OEI INTERNATIONAL INC
S-1/A, 1998-07-07
ENGINEERING SERVICES
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      AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON JULY 7, 1998
                                                      REGISTRATION NO. 333-50323
    
================================================================================

                       SECURITIES AND EXCHANGE COMMISSION
                            ------------------------
   
                                AMENDMENT NO. 4
                                       TO
                                    FORM S-1
    
                             REGISTRATION STATEMENT
                                     UNDER
                           THE SECURITIES ACT OF 1933
                            ------------------------

                            OEI INTERNATIONAL, INC.
             (EXACT NAME OF REGISTRANT AS SPECIFIED IN ITS CHARTER)
   
<TABLE>
<CAPTION>
<S>                                       <C>                                         <C>
              DELAWARE                                  8711                                 76-0552644
   (STATE OR OTHER JURISDICTION OF          (PRIMARY STANDARD INDUSTRIAL                  (I.R.S. EMPLOYER
   INCORPORATION OR ORGANIZATION)           CLASSIFICATION CODE NUMBER)                IDENTIFICATION NUMBER)
</TABLE>
    
                         2727 NORTH LOOP WEST, SUITE 400
                              HOUSTON, TEXAS 77009
                              PHONE: (713) 880-6200
                               FAX: (713) 880-6300
    (ADDRESS, INCLUDING ZIP CODE, AND TELEPHONE NUMBER, INCLUDING AREA CODE,
                  OF REGISTRANT'S PRINCIPAL EXECUTIVE OFFICES)

                                MICHAEL L. BURROW
                             CHIEF EXECUTIVE OFFICER
                             OEI INTERNATIONAL, INC.
                         2727 NORTH LOOP WEST, SUITE 400
                              HOUSTON, TEXAS 77009
                              PHONE: (713) 880-6200
                               FAX: (713) 880-6300

            (NAME, ADDRESS, INCLUDING ZIP CODE, AND TELEPHONE NUMBER,
                   INCLUDING AREA CODE, OF AGENT FOR SERVICE)

                            ------------------------

                                WITH COPIES TO:

           ROBERT G. REEDY                              STEPHEN P. FARRELL
       PORTER & HEDGES, L.L.P.                      MORGAN, LEWIS & BOCKIUS LLP
      700 LOUISIANA, 35TH FLOOR                           101 PARK AVENUE
      HOUSTON, TEXAS 77002-2764                    NEW YORK, NEW YORK 10178-0060
        PHONE: (713) 226-0600                          PHONE: (212) 309-6000
         FAX: (713) 226-0274                            FAX: (212) 309-6273

     APPROXIMATE DATE OF PROPOSED SALE TO THE PUBLIC:  As soon as practicable
after this Registration Statement becomes effective.

     If any of the securities being registered on this Form are to be offered on
a delayed or continuous basis pursuant to Rule 415 under the Securities Act of
1933, check the following box. [ ]

     If this Form is filed to register additional securities for an offering
pursuant to Rule 462(b) under the Securities Act, please check the following box
and list the Securities Act registration statement number of the earlier
effective registration statement for the same offering. [ ]

     If this Form is a post-effective amendment filed pursuant to Rule 462(c)
under the Securities Act, check the following box and list the Securities Act
registration statement number of the earlier effective registration statement
for the same offering. [ ]

     If delivery of the prospectus is expected to be made pursuant to Rule 434,
please check the following box. [ ]

     THE REGISTRANT HEREBY AMENDS THIS REGISTRATION STATEMENT ON SUCH DATE OR
DATES AS MAY BE NECESSARY TO DELAY ITS EFFECTIVE DATE UNTIL THE REGISTRANT SHALL
FILE A FURTHER AMENDMENT WHICH SPECIFICALLY STATES THAT THIS REGISTRATION
STATEMENT SHALL THEREAFTER BECOME EFFECTIVE IN ACCORDANCE WITH SECTION 8(A) OF
THE SECURITIES ACT OF 1933 OR UNTIL THE REGISTRATION STATEMENT SHALL BECOME
EFFECTIVE ON SUCH DATE AS THE COMMISSION, ACTING PURSUANT TO SAID SECTION 8(A),
MAY DETERMINE.

================================================================================
<PAGE>
******************************************************************************
*                                                                            *
*   INFORMATION CONTAINED HEREIN IS SUBJECT TO COMPLETION OR AMENDMENT. A    *
*   REGISTRATION STATEMENT RELATING TO THESE SECURITIES HAS BEEN FILED       *
*   WITH THE SECURITIES AND EXCHANGE COMMISSION. THESE SECURITIES MAY NOT    *
*   BE SOLD NOR MAY OFFERS TO BUY BE ACCEPTED PRIOR TO THE TIME THE          *
*   REGISTRATION STATEMENT BECOMES EFFECTIVE. THIS PROSPECTUS SHALL NOT      *
*   CONSTITUTE AN OFFER TO SELL OR THE SOLICITATION OF AN OFFER TO BUY NOR   *
*   SHALL THERE BE ANY SALE OF THESE SECURITIES IN ANY STATE IN WHICH SUCH   *
*   OFFER, SOLICITATION OR SALE WOULD BE UNLAWFUL PRIOR TO REGISTRATION OR   *
*   QUALIFICATION UNDER THE SECURITIES LAWS OF ANY SUCH STATE.               *
*                                                                            *
******************************************************************************
   
                   SUBJECT TO COMPLETION, DATED JULY 7, 1998
    
PROSPECTUS

                                4,300,000 Shares

                         [OEI INTERNATIONAL, INC. LOGO]

                                  Common Stock
                               ------------------
   
     All of the 4,300,000 shares of common stock, par value $.001 per share (the
"Common Stock"), offered hereby (the "Offering") are being sold by OEI
International, Inc. ("OEI"). Prior to the Offering, there has been no public
market for the Common Stock of OEI. It is currently estimated that the initial
public offering price will be between $13.00 and $15.00 per share. See
"Underwriting" for a discussion of the factors to be considered in determining
the initial public offering price. The Common Stock has been approved for
listing on the New York Stock Exchange under the symbol "ENG," subject to
official notice of issuance.
    
     SEE "RISK FACTORS" COMMENCING ON PAGE 8 OF THIS PROSPECTUS FOR A
DISCUSSION OF CERTAIN FACTORS THAT SHOULD BE CONSIDERED BY PROSPECTIVE
PURCHASERS OF THE COMMON STOCK OFFERED HEREBY.
                               ------------------

    THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES
    AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION, NOR HAS THE
     SECURITIES AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION
          PASSED UPON THE ACCURACY OR ADEQUACY OF THIS PROSPECTUS. ANY
             REPRESENTATION TO THE CONTRARY IS A CRIMINAL OFFENSE.

                                           UNDERWRITING
                       PRICE TO           DISCOUNTS AND            PROCEEDS
                        PUBLIC            COMMISSIONS(1)        TO COMPANY(2)
- ------------------------------------------------------------------------------
Per Share            $                     $                     $
- ------------------------------------------------------------------------------
Total(3)             $                     $                     $
- ------------------------------------------------------------------------------

(1) For information regarding indemnification of the several Underwriters, see
    "Underwriting."

(2) Before deducting expenses of the Offering payable by OEI, estimated at
    $         .

(3) OEI has granted the Underwriters a 30-day option to purchase up to 645,000
    additional shares of Common Stock solely to cover over-allotments, if any.
    See "Underwriting." If such option is exercised in full, the total Price
    to Public, Underwriting Discounts and Commissions, and Proceeds to Company
    will be $         , $         and $         , respectively.

                               ------------------

     The shares of Common Stock are being offered by the several Underwriters
named herein, subject to prior sale, when, as and if accepted by them and
subject to certain conditions. It is expected that certificates for the shares
of Common Stock offered hereby will be available for delivery on or about
          , 1998 at the office of Salomon Smith Barney, 333 West 34th Street,
New York, NY 10001.

Salomon Smith Barney

                                 CIBC Oppenheimer

                                                            Sanders Morris Mundy

               , 1998
<PAGE>
     CERTAIN PERSONS PARTICIPATING IN THIS OFFERING MAY ENGAGE IN TRANSACTIONS
THAT STABILIZE, MAINTAIN OR OTHERWISE AFFECT THE PRICE OF THE COMMON STOCK,
INCLUDING OVERALLOTMENT, ENTERING STABILIZING BIDS, EFFECTING SYNDICATE COVERING
TRANSACTIONS AND IMPOSING PENALTY BIDS. FOR A DESCRIPTION OF THESE ACTIVITIES,
SEE "UNDERWRITING."

                                       2
<PAGE>
                               PROSPECTUS SUMMARY

     UNLESS OTHERWISE INDICATED, REFERENCES HEREIN TO (I) "OEI" MEAN OEI
INTERNATIONAL, INC., WHICH IS THE HOLDING COMPANY FORMED FOR THE PURPOSE OF
CONDUCTING THE OFFERING AND SIMULTANEOUSLY COMBINING, IN SEPARATE TRANSACTIONS
(THE "PENDING ACQUISITIONS"), FOUR OTHER ENGINEERING FIRMS (SUCH OTHER FIRMS
COLLECTIVELY, THE "ACQUIRED COMPANIES") WITH PETROCON ENGINEERING, INC. AND
ITS SUBSIDIARIES ("PETROCON") AND (II) THE "COMPANY" MEAN OEI AND ITS
SUBSIDIARIES, WHICH INCLUDE, AFTER GIVING EFFECT TO THE PENDING ACQUISITIONS,
PETROCON AND THE ACQUIRED COMPANIES.

     THE FOLLOWING SUMMARY IS QUALIFIED IN ITS ENTIRETY BY THE DETAILED
INFORMATION AND FINANCIAL STATEMENTS, INCLUDING THE NOTES THERETO, APPEARING
ELSEWHERE IN THIS PROSPECTUS. UNLESS OTHERWISE INDICATED, THE INFORMATION IN
THIS PROSPECTUS, INCLUDING SHARE AND PER SHARE DATA, (I) GIVES EFFECT TO THE
PENDING ACQUISITIONS, (II) ASSUMES THE UNDERWRITERS' OVER-ALLOTMENT OPTION IS
NOT EXERCISED AND (III) GIVES EFFECT TO A 1,828.368-FOR-ONE SPLIT OF COMMON
STOCK EFFECTED ON APRIL 6, 1998.

                                  THE COMPANY
   
     The Company is a diversified engineering company providing engineering
services and engineered systems to a broad range of industrial, commercial and
institutional clients throughout the United States and internationally. The
Company's multidisciplined expertise enables it to offer its clients total
design and engineering solutions extending from project inception through
completion, start-up and operation, within multiple industries and across
diverse geographic markets. During 1997, the Company was involved in engineering
projects in 26 states and over 21 countries worldwide, generating pro forma
combined revenues of approximately $169.1 million, of which $119.5 million, or
70.7%, was from domestic projects, and $49.6 million, or 29.3%, was from
international work.
    
     OEI was formed in October 1997 by Petrocon's management to conduct the
Offering, simultaneously consummate the Pending Acquisitions and continue
Petrocon's successful acquisition program. The Company, through Petrocon, has
grown significantly through acquisitions, having acquired more than 13
engineering firms since 1988. As a result of the Pending Acquisitions and the
Offering, the Company believes it will have greater financial, technical and
professional resources, which will enable it to aggressively continue its
successful acquisition strategy, enhance its technical capabilities and expand
its already diversified client base.

     The Company operates in two principal segments: engineering services and
engineered systems. The Company's engineering services encompass all aspects of
the process, civil, structural, mechanical, instrument, electrical, geotechnical
and environmental engineering and design disciplines, providing its clients with
a single source for all their design, engineering and permitting needs. The
Company has designed and engineered facilities ranging from refineries,
petrochemical plants, pulp and paper processing plants and wastewater treatment
facilities, to food and beverage processing plants, pharmaceutical plants and
laboratories, electronics manufacturing facilities, hotels and casinos. The
Company's engineered systems are primarily custom designed, built, programmed
and installed on a fixed-price, turnkey basis and include control and
instrumentation systems and modular processing plants primarily for the oil and
gas, refining and chemical processing industries. During 1997, approximately
$123.5 million, or 73.0%, of the Company's pro forma combined revenues were
attributable to engineering services and $45.6 million, or 27.0%, were
attributable to engineered systems. The Company provides engineering services
and engineered systems to a number of Fortune 100 companies through a staff of
over 1,600 employees, including approximately 1,100 engineers and design
professionals as of March 31, 1998.

     The Company has developed a strategic plan to:

            o   EXPAND AND DIVERSIFY THROUGH ACQUISITIONS.  By continuing to
     acquire well-established and highly respected local and regional firms
     within the U.S., as well as foreign firms, the Company intends to (i)
     expand into new geographic markets, (ii) broaden its areas of acknowledged
     technical

                                       3
<PAGE>
     expertise, (iii) continue to strengthen its presence within existing
     geographic markets and specialties and (iv) enhance its cross-marketing
     opportunities.

            o   ACCELERATE INTERNAL GROWTH.  The principal elements of the
     Company's internal growth strategy are to (i) attract larger, higher margin
     projects, (ii) leverage the Company's capabilities and expertise through
     cross-marketing and (iii) develop partnering relationships and other
     strategic alliances.

            o   IMPROVE OPERATING MARGINS.  The Company intends to capitalize on
     opportunities to achieve operating efficiencies and cost savings by
     implementing strategies to (i) increase its overall staff utilization rate
     by more effectively deploying and allocating its professional resources,
     (ii) consolidate administrative functions and (iii) use its increased
     purchasing power to gain volume discounts for itself and in connection with
     its procurement services for its clients.

            o   OUTSOURCE CONSTRUCTION ACTIVITIES.  The Company believes it can
     offer clients the advantages of turnkey, lump sum projects, without
     directly performing the construction activities associated with these
     projects, by forming joint ventures and other partnering relationships with
     construction firms. The Company believes it will benefit from such a
     strategy by limiting its exposure to construction risks.

            o   OPERATE ON A DECENTRALIZED BASIS.  The Company intends to manage
     its operating companies on a decentralized basis, with local management
     retaining responsibility for day-to-day operations, profitability and
     growth. The Company believes that combining a decentralized management
     structure with strong, centralized operating and financial controls geared
     to accountability, will support the entrepreneurial and creative culture at
     each of the operating companies, while allowing the Company to capitalize
     on the local and regional market knowledge, goodwill, name recognition and
     client relationships of each of the operating companies.

     In recent years, the Company has observed and benefitted from a growing
demand for its services and systems due to, among other reasons, (i) an industry
trend towards outsourcing engineering functions as a result of reduced in-house
engineering staffs, (ii) rapid technological advancements in construction,
manufacturing and processing operations, (iii) the increased scope and
complexity of governmental, and particularly environmental, regulations and (iv)
increased capital expenditures resulting from aging infrastructures of the
United States and Western Europe, as well as the rapid growth and
industrialization of the lesser developed countries. According to ENGINEERING
NEWS-RECORD ("ENR"), its "Top 500 Design Firms," which include U.S.-based
engineer-constructor, engineer-architect and other hybrid organizations, as well
as exclusively design and planning firms, billed their clients an aggregate of
$32.7 billion in 1997. ENR also reports that the world's "Top 200 International
Design Firms" had worldwide revenues aggregating more than $34.5 billion in
1996, the latest year for which data is currently available. Industry
consultants estimate there are more than 28,000 engineering firms in the U.S.
alone, and the Company believes there are significant opportunities for an
established, professionally managed and well-capitalized engineering company to
consolidate regional, local and foreign engineering firms.

     The Company's executive offices are located at 2727 North Loop West, Suite
400, Houston, Texas 77009, and its telephone number is (713) 880-6200.

                                       4
<PAGE>
                                  THE OFFERING

Common Stock offered by the Company..... 4,300,000
Common Stock to be outstanding after the 
  Offering(1)........................... 11,835,494
Use of Proceeds......................... To pay the cash portion of the purchase
                                         price for the Pending Acquisitions, to 
                                         repay expenses incurred in connection 
                                         with the organization of OEI and the 
                                         Offering and to repay certain 
                                         indebtedness of the Company. See "Use 
                                         of Proceeds."
NYSE symbol............................. ENG

- ------------

(1) The number of shares estimated to be outstanding on completion of the
    Offering consists of (i) 1,828,368 shares issued to the organizers of OEI,
    including 609,395 shares issued to members of OEI's executive management,
    (ii) 5,053,027 shares to be issued as consideration in the Pending
    Acquisitions, (iii) the 4,300,000 shares being offered by this Prospectus
    and (iv) 654,099 shares which will be placed in escrow, and which will be
    subject to a maximum three-year earnout arrangement with respect to one of
    the Pending Acquisitions (see "The Company -- Summary of Terms of the
    Pending Acquisitions"). Such share number does not include (i) an aggregate
    of 1,765,223 subject to options to be granted or allocated for grant on or
    prior to the closing of the Offering under the Company's 1998 Incentive Plan
    (the "Incentive Plan"), 996,839 shares of which have an exercise price
    equal to the initial public offering price per share and 768,384 of which
    will have a weighted average exercise price per share of $7.68 (see
    "Management -- Incentive Plan") or (ii) an aggregate of 357,579 shares
    subject to warrants at an exercise price per share of $9.42 to be issued in
    connection with the acquisition of Petrocon (see "The Company -- Summary of
    Terms of the Pending Acquisitions").

                                  RISK FACTORS
   
     The Common Stock offered hereby involves a high degree of risk. See "Risk
Factors" beginning immediately after this Prospectus Summary for information
that should be considered by prospective investors. Such risks include limited
combined operating history and risks related to integration and internal growth;
dependence on industry spending; dependence on large projects; risks related to
foreign operations; dependence on acquisitions for growth; need for additional
financing, including debt financing, for acquisition program; risks associated
with new credit facility; pricing and related risk sharing; competition; risks
associated with backlog; risks inherent in completion guarantees; reliance on
skilled professionals and management personnel; proceeds of offering payable to
affiliates and associates; liability claims and insurance; fluctuations in
quarterly operating results; implications of government regulations; significant
intangible assets; impact of year 2000 compliance; significant voting control by
existing management and stockholders; potential effect of shares eligible for
future sale on price of Common Stock; immediate and substantial dilution; no
prior market and possible volatility of stock price; potential anti-takeover
effects; and forward-looking statements.
    
                                       5
<PAGE>
            SUMMARY HISTORICAL AND PRO FORMA COMBINED FINANCIAL DATA

     The Company will consummate the Pending Acquisitions concurrently with, and
as a condition to, the consummation of the Offering. For financial statement
presentation purposes, Petrocon is deemed to be the accounting acquirer. The
following summary historical financial data of Petrocon for the years ended
December 31, 1995, 1996 and 1997, and as of December 31, 1996 and 1997, have
been derived from audited consolidated financial statements of Petrocon included
elsewhere in this Prospectus. The following selected historical financial data
for Petrocon for the three months ended March 31, 1997 and 1998, and as of March
31, 1998, have been derived from unaudited consolidated financial statements of
Petrocon which have been prepared on the same basis as the audited financial
statements and, in the opinion of Petrocon, reflect all adjustments, consisting
of normal recurring adjustments, necessary for a fair presentation of such data.
The following summary unaudited pro forma combined financial data gives effect
to the Pending Acquisitions and certain other pro forma adjustments and is
adjusted to reflect the consummation of the Offering and the application of the
estimated net proceeds therefrom. See "Selected Historical and Pro Forma
Combined Financial Data" and the Unaudited Pro Forma Combined Financial
Statements and the notes thereto included elsewhere in this Prospectus.
   
<TABLE>
<CAPTION>
                                                             PETROCON
                                       -----------------------------------------------------       PRO FORMA COMBINED(1)
                                                                            THREE MONTHS       ------------------------------
                                                                               ENDED                             THREE MONTHS
                                           YEAR ENDED DECEMBER 31,           MARCH 31,          YEAR ENDED          ENDED
                                       -------------------------------  --------------------   DECEMBER 31,       MARCH 31,
                                         1995       1996       1997       1997       1998          1997              1998
                                       ---------  ---------  ---------  ---------  ---------   ------------      ------------
                                                               (IN THOUSANDS, EXCEPT PER SHARE DATA)
                                                                            (UNAUDITED)                 (UNAUDITED)
<S>                                    <C>        <C>        <C>        <C>        <C>          <C>               <C>       
STATEMENT OF OPERATIONS DATA:
  Revenues...........................  $  52,386  $  61,851  $  92,616  $  19,496  $  25,915    $  169,065        $   42,184
                                       ---------  ---------  ---------  ---------  ---------   ------------      ------------
  Gross profit.......................     10,242     12,599     20,923      4,017      5,394        51,204            12,183
  General and administrative
   expenses..........................      8,336      9,498     15,062      3,233      3,689        30,903(2)          8,536(2)
  Goodwill amortization..............         23         79        254         85        103         1,858(3)            504(3)
                                       ---------  ---------  ---------  ---------  ---------   ------------      ------------
  Income from operations.............      1,883      3,022      5,607        699      1,602        18,443             3,143
  Interest income (expense), net.....       (456)      (592)    (1,569)      (350)      (386)         (446)(4)          (196) (4)
  Other income (expense), net........        382         86        290         88        (65)          421               (51)
                                       ---------  ---------  ---------  ---------  ---------   ------------      ------------
  Income from continuing operations
   before provision for income
   taxes.............................      1,809      2,516      4,328        437      1,151        18,418             2,896
    Provision for income taxes.......        599      1,051      1,574        159        479         8,010             1,319
                                       ---------  ---------  ---------  ---------  ---------   ------------      ------------
  Income from continuing
   operations........................  $   1,210  $   1,465  $   2,754  $     278  $     672    $   10,408        $    1,577
                                       =========  =========  =========  =========  =========   ============      ============
  Income per share from continuing
   operations
    Basic............................                                                           $      .88        $      .13
                                                                                               ============      ============
    Diluted..........................                                                           $      .85        $      .13
                                                                                               ============      ============
  Shares used in computing pro forma
   income per share from continuing
   operations
    Basic............................                                                           11,835,494(4)     11,835,494(4)
                                                                                               ============      ============
    Diluted..........................                                                           12,299,454(4)     12,299,454(4)
                                                                                               ============      ============
    
<CAPTION>

                                                    PETROCON
                                       ----------------------------------
                                                                                     MARCH 31, 1998
                                           DECEMBER 31,        MARCH 31,     ------------------------------
                                       --------------------   -----------     PRO FORMA
                                         1996       1997         1998        COMBINED(1)     AS ADJUSTED(5)
                                       ---------  ---------   -----------    ------------    --------------
                                                                  (IN THOUSANDS)
                                                              (UNAUDITED)             (UNAUDITED)
<S>                                    <C>        <C>           <C>            <C>              <C>     
BALANCE SHEET DATA:
  Working capital (deficit)..........  $  (1,482) $  (3,807)    $(3,610)       $(32,556)        $ 17,080
  Total assets.......................     26,377     41,903      42,864         135,845          137,017
  Total debt, including current
   portion...........................     11,865     16,445      16,435          56,890            5,832
  Stockholders' equity...............      6,753     13,919      14,638          54,251          107,237
</TABLE>
                                                   (FOOTNOTES ON FOLLOWING PAGE)

                                       6
<PAGE>
- ------------

(1) The pro forma combined statement of operations data assume the following
    transactions and events were consummated on January 1, 1997: (i) the
    organization of OEI and its initial issuance of shares of Common Stock; (ii)
    a 1,828.368 for-one split of the outstanding Common Stock; (iii) the Pending
    Acquisitions; and (iv) the closing of the Offering and the application of
    its estimated net proceeds, and are not necessarily indicative of the
    results the Company would have obtained had these events actually occurred
    at that date or of the Company's future results. The pro forma combined
    balance sheet data assume that items (i), (ii) and (iii) above occurred on
    March 31, 1998 and that the net indebtedness incurred by the Company since
    March 31, 1998 occurred and existed on that date. The pro forma combined
    financial data (i) are based on preliminary estimates, available information
    and certain assumptions that management deems appropriate and (ii) should be
    read in conjunction with the other financial statements and notes thereto
    included elsewhere in this Prospectus.
   
(2) The pro forma combined statement of operations data include the effect of:
    (i) a reduction in compensation and benefits of approximately $2.7 million
    for the year ended December 31, 1997 agreed to as part of the purchase
    agreements by certain owners and key employees of the Acquired Companies
    pursuant to the Pending Acquisitions; (ii) the elimination of a non-cash,
    non-recurring compensation charge of approximately $0.5 million by the
    Company for the three months ended March 31, 1998; and (iii) distributions
    by certain Acquired Companies of certain assets prior to the closing of the
    Pending Acquisitions. The Unaudited Pro Forma Combined Financial Statements
    do not reflect other potential cost savings, revenue growth or costs
    associated with being a public company.
    
(3) Reflects amortization of the goodwill to be recorded over a 40-year period
    as a result of the Pending Acquisitions.

(4) Computed on a basis described in Note 4 of Notes to the Unaudited Pro Forma
    Combined Financial Statements.

(5) Reflects the closing of the Offering and the Company's application of the
    net proceeds therefrom and repayment of $1.4 million at March 31, 1998 of
    Petrocon indebtedness from cash on hand. See "Use of Proceeds."

                                       7
<PAGE>
                                  RISK FACTORS

     Prior to making an investment decision, prospective purchasers of the
Common Stock offered hereby should consider carefully all of the information set
forth in this Prospectus and, particularly, should evaluate the following risk
factors.

LIMITED COMBINED OPERATING HISTORY; RISKS RELATED TO INTEGRATION AND INTERNAL
GROWTH

     Petrocon and the Acquired Companies have operated, and will continue to
operate prior to the closing of the Pending Acquisitions, as separate,
independent businesses. Consequently, the pro forma financial information
contained herein may not be indicative of the Company's future operating results
and financial condition. The Company will rely initially on the separate
accounting and information systems of Petrocon and each of the Acquired
Companies, but the success of the Company will depend, in part, on the extent to
which it is able to centralize and integrate necessary systems and functions,
including accounting, financial reporting and job costing systems, among the
Acquired Companies. The inability of the Company to successfully centralize and
integrate these systems and functions could have a material adverse effect on
the Company's business, financial condition and results of operations, and could
adversely affect the Company's implementation of its acquisition and operating
strategies. See "Business -- Operations."

     The success of the Company's internal growth strategy will depend on
various factors, including the demand for the Company's services and systems and
the Company's ability to (i) attract larger, higher margin projects, (ii)
leverage its capabilities and expertise through cross-marketing, (iii) develop
partnering relationships and other strategic alliances and (iv) achieve client
acceptance of project processes through which the Company intends to share work,
professionals and other resources among its operating companies. These factors
are, at least in part, beyond the Company's control, and there can be no
assurance the Company's internal growth strategy will be successful.

DEPENDENCE ON INDUSTRY SPENDING

     The demand for the Company's services and systems depends on the level of
capital and maintenance expenditures by its industrial, commercial and
institutional clients, particularly those private sector clients involved in the
oil and gas, refining and petrochemical industries. In 1997, the revenues
attributable to the oil and gas, refining and petrochemical industries
represented $141.2 million, or 83.5% of the Company's pro forma combined
revenues. These industries historically have been cyclical in nature and
vulnerable to many of the same national and regional economic factors that
affect the economy in general. In addition, if the current or any future decline
in energy prices were to be sustained over a significant period of time, the
capital and maintenance expenditures within these industries may be adversely
affected, which could have a material adverse effect on the Company's operating
results. Other factors influencing private and public spending levels include
general economic conditions, inflation, interest rates, the availability of
financing, the availability and price of raw materials, and political
considerations.

DEPENDENCE ON LARGE PROJECTS

     The Company historically has not had a continuing dependence on any single
client or a limited group of clients; however, one or a few clients have
contributed in the past, and may in the future contribute, a substantial portion
of the Company's revenues in any one year or over a period of several
consecutive years due to the size of particular engineering projects. In 1997,
the Company's five largest projects represented $14.4 million, or 8.5%, of the
Company's pro forma combined revenues. Accordingly, the Company must continually
obtain significant new engineering projects, whether from existing or new
clients, in order to generate revenues in the future as existing projects are
completed. The failure to do so would have a material adverse effect on the
Company's operating results. See "Business -- Clients."

RISKS RELATED TO FOREIGN OPERATIONS
   
     In 1997, the Company derived approximately $49.6 million, or approximately
29.3%, of its pro forma combined revenues from foreign projects. Also, Petrocon
Arabia Limited ("PAL"), in which the Company has a 50% interest, had 1997
revenues of approximately $16.4 million, which are not included in the
    
                                       8
<PAGE>
Company's 1997 pro forma combined revenues because the Company accounts for its
interest in PAL by the equity method. Most of PAL's revenues were derived from
work in the Middle East. International engineering and design work involves
risks that are normally associated with doing business overseas, such as risks
of war, terrorism, expropriation, civil unrest, political and economic
instability, nationalization of assets, currency fluctuation and repatriation
risks, overlap of different tax structures and sometimes ill-defined or
underdeveloped systems of contract laws and commercial codes. Additionally,
certain international risks are particular to engineering and construction,
including (i) open-ended bonds or other security instruments to guarantee bids
and performance, (ii) reliance on host country subcontractors, suppliers and
personnel, (iii) permitting, construction and payment delays occasioned by
bureaucratic inefficiencies, and (iv) difficulties in obtaining required or
appropriate insurance. See "Business -- Foreign Operations."

DEPENDENCE ON ACQUISITIONS FOR GROWTH

     The Company intends to grow primarily by acquiring engineering and design
firms which expand or complement the Company's existing operations. The
Company's acquisition strategy presents risks that, singly or in combination,
could materially adversely affect its business and financial performance. These
risks include those inherent in assessing the value, strengths, weaknesses,
contingent or other liabilities and potential profitability of acquisition
candidates, the possibility of an adverse effect on existing operations of the
Company from the diversion of management attention and resources to
acquisitions, and the possible loss of acquired client bases and key personnel,
including engineers, designers, scientists and other professionals. The success
of the Company's acquisition strategy will depend on the extent to which
acquisition candidates continue to be available and whether the Company will be
able to acquire, successfully integrate and profitably manage additional
businesses. The Company believes that competitive and other pressures are
causing engineering firms of all sizes to combine at the local, regional,
national and international levels. Therefore, competition for acquisition
candidates could materially increase their cost. The timing, size and success of
the Company's acquisition efforts, and the associated capital commitments,
cannot readily be predicted. Accordingly, no assurance can be given the
Company's acquisition strategy will succeed. See "Business -- Business
Strategy" and "Business -- Acquisition Strategy."

NEED FOR ADDITIONAL FINANCING FOR ACQUISITION PROGRAM

     All of the net proceeds of the Offering will be used in connection with the
Pending Acquisitions. See "Use of Proceeds." The Company's acquisition
strategy will require substantial additional capital. The Company currently
intends to use cash and shares of Common Stock in making future acquisitions.
Using internally generated cash or debt to complete acquisitions could
substantially limit the Company's operational and financial flexibility. The
extent to which the Company will be able or willing to use Common Stock for
acquisitions will depend on the market value of the Common Stock from time to
time and the willingness of potential sellers to accept the Common Stock as full
or partial payment. Using Common Stock for acquisitions may result in a
significant dilution to then existing Company stockholders. To the extent the
Company is unable to use Common Stock to make future acquisitions, its growth
may be limited by its ability to raise capital for this purpose through debt or
additional equity financings. The Company cannot assure that it will be able to
obtain the necessary capital to finance a successful acquisition program while
meeting its other cash needs. If the Company is unable to obtain additional
capital on acceptable terms, it may be required to reduce the scope of its
presently anticipated expansion. See "Management's Discussion and Analysis of
Financial Condition and Results of Operations -- Pro Forma Combined -- Liquidity
and Capital Resources."

RISKS ASSOCIATED WITH NEW CREDIT FACILITY

     The Company has recently received a commitment letter from Bank One, Texas,
N.A. to provide the Company with a credit facility (the "New Credit Facility")
from $50.0 million to $75.0 million, depending on syndication subscriptions,
which may be used for refinancing of certain indebtedness of the Company,
acquisitions, working capital and other general corporate purposes. The New
Credit Facility will be secured by a pledge of the capital stock of all OEI's
domestic subsidiaries and a negative pledge of the Company's assets. The New
Credit Facility will require compliance with various affirmative and negative
covenants

                                       9
<PAGE>
(including maintenance of certain financial ratios) which could limit the
Company's operational and financial flexibility. The New Credit Facility is
subject to negotiation of definitive documentation and certain other customary
conditions, and there can be no assurance that the Company will be able to
obtain the New Credit Facility on terms acceptable to the Company. See
"Management's Discussion and Analysis of Financial Condition and Results of
Operations -- Pro Forma Combined -- Liquidity and Capital Resources."

PRICING AND RELATED RISK SHARING

     Historically, a high percentage of the Company's projects have been
undertaken on a relatively riskless cost plus fee (either fixed or a percentage)
basis. However, project owners are increasingly seeking, and the Company and its
competitors are accepting and even initiating, pricing alternatives designed to
shift to the service provider, or requiring the service provider to at least
share in, the risks of cost overruns and inefficiencies in the delivery of
services. These alternatives include fixed-price, guaranteed maximum price,
incentive fee, competitive bidding and other "value based" pricing
arrangements. The Company expects this trend to continue in the future, with the
result that the Company will be required to maintain and continually improve,
relative to its competitors, both the precision of its cost estimates and the
efficiency with which it delivers its services. If the Company's discipline in
either of these areas declines or fails to keep pace with that of its
competitors, both the volume of awarded projects and their margins may be
affected adversely. See "-- Competition," "Business -- Contracts" and
"Business -- Competition."

COMPETITION

     The Company competes nationally and internationally with many engineering
and construction management firms that are substantially larger and have
substantially greater financial, professional and other resources than the
Company. The Company also faces competition from many regional and local firms.
Barriers to entry for engineering firms are relatively low, and the risk of new
competitors entering the market, particularly in local and regional areas, and
particularly with respect to speciality areas, is high. See
"Business -- Competition."

RISKS ASSOCIATED WITH BACKLOG

     The Company's combined backlog was $101.7 million at December 31, 1997
compared to $63.3 million at December 31, 1996, and was $86.2 million at March
31, 1998. The combined backlog, most of which is expected to be completed within
the next 12 months, includes only contracts for which the Company has received
authorization to proceed with the work. Although this backlog represents only
work which is under contract, it is not necessarily indicative of the Company's
future revenues or earnings related to the performance of the work included in
backlog. The Company's contracts are subject to standard industry cancellation
provisions, including cancellation on short notice or upon completion of
designated stages. Authorizations to proceed are for periods generally shorter
than the duration of the work the Company expects to perform for a particular
client, and substantial scope-of-work adjustments are common. For these and
other reasons beyond the Company's control, work represented in backlog may be
delayed or cancelled, and backlog should not be relied upon as an indicator of
the Company's future performance. See "Business -- Backlog."

RISKS INHERENT IN COMPLETION GUARANTEES
   
     In certain instances, the Company guarantees project completion by a
scheduled date or by achievement of certain acceptance and performance testing
or milestone levels. At December 31, 1997, the Company had underway projects
aggregating approximately $47.2 million in contract amount, which are subject to
some form of completion or performance guarantee. If the Company fails to meet
any required completion or performance requirement and is unable to remedy the
failure within any applicable cure period, the Company could incur financial
penalties in the form of liquidated damages or could be required to redesign or
repeat the service or replace or repair the system. While the Company has in the
past undertaken a limited number of guaranteed projects and has not incurred
material obligations with respect to
    
                                       10
<PAGE>
such projects, the Company may in the future undertake more guaranteed projects,
which could have a material adverse effect on the Company if it is unable to
satisfy future guarantee requirements.

RELIANCE ON SKILLED PROFESSIONALS AND MANAGEMENT PERSONNEL

     The Company derives its revenues from, and its reputation is based on, the
efforts of engineers, scientists, chemists, designers and other highly skilled
and experienced technical personnel. Demand for these professionals is high,
their qualifications render them particularly mobile, and they are particularly
attentive to their workplace environment. The on-going risk of losing qualified
and experienced professionals from the Company could increase because of actual
or perceived changes resulting from becoming part of a larger and perhaps
culturally different organization. The business of the Company could be affected
adversely if the Company's ability to retain skilled professionals becomes
impaired for any reason.

     The Company also depends in large part on the continuing efforts of its
executive officers and senior management, and will likely depend on the senior
management of any significant business it acquires in the future. That
dependence may be intensified by the Company's decentralized operating strategy.
If members of senior management leave the Company, until the Company attracts
and retains qualified replacements, the Company's business or prospects could be
affected adversely. Further, the historical growth of the Company can in some
measure be attributed to the entrepreneurial spirit of the senior management of
the Acquired Companies. To the extent the Company, as a larger, more structured
organization than any of the Acquired Companies, fails to sustain this
entrepreneurial attitude, the impetus for the Company's continued growth
following the Pending Acquisitions could diminish.

PROCEEDS OF OFFERING PAYABLE TO AFFILIATES AND ASSOCIATES
   
     The net proceeds from the Offering will be used: (i) to pay the cash
portion of the aggregate purchase price for the Pending Acquisitions
(approximately $27.8 million); (ii) to repay certain outstanding indebtedness of
the Company (approximately $21.8 million), approximately $3.0 million of which
is payable to the GEI stockholders; (iii) to place in escrow approximately $3.4
million, which will be subject to a maximum three year earnout arrangement with
respect to one of the Pending Acquisitions; and (iv) to pay certain expenses of
the Offering and the Pending Acquisitions. See "Use of Proceeds." The cash
payable to the former stockholders of Petrocon and the Acquired Companies will
include approximately $2.7 million payable to persons who will become directors
or executive officers of OEI. The Offering will enable the Company to repay $2.5
million of advances by Equus II Incorporated ("Equus II"), which were used to
pay expenses of the Offering, and will benefit the existing stockholders of the
Company by creating a public market for the Common Stock. For a more detailed
discussion of the use of proceeds of the Offering, and the benefits to be
received by persons who are or will become directors or executive officers of
OEI or beneficial holders of 5% or more of the Common Stock on consummation of
the Offering and the Pending Acquisitions, see "Use of Proceeds" and "Certain
Transactions -- Pending Acquisitions Involving Certain Officers, Directors and
Stockholders."
    
LIABILITY CLAIMS AND INSURANCE

     Providing engineering and design services involves the risk of contract,
professional errors and omissions and other liability claims, as well as adverse
publicity. Further, many of the Company's contracts with its clients require the
Company to indemnify the clients not only for the Company's negligence, but also
for the concurrent negligence of the clients. While the Company maintains
liability insurance coverage, including for professional errors and omissions,
in amounts it considers adequate, there can be no assurance that claims outside
of or exceeding its insurance coverage will not be made, or that the Company
will be able to continue to obtain adequate insurance coverage at rates it
considers reasonable. See "Business -- Risk Management; Litigation."

FLUCTUATIONS IN QUARTERLY OPERATING RESULTS

     Holidays and inclement weather during the Company's fourth quarter exert
downward pressure on the Company's revenues for that quarter, which is only
partially offset by the year-end efforts on the part of

                                       11
<PAGE>
many of the Company's clients, particularly in the energy and public sectors, to
spend any remaining funds budgeted for capital expenditures during the year. The
annual budgeting and approval process under which these clients operate is
normally not completed until after the beginning of each new year, which, when
combined with continuing inclement weather, can depress the Company's operating
results for the first quarter. Principally due to these factors, the Company's
revenues during its first and fourth quarters tend to be, but are not always,
lower than in its second and third quarters.

IMPLICATIONS OF GOVERNMENT REGULATIONS

     The Company and its clients are subject to various foreign, federal, state
and local laws and regulations, including those relating to the environment,
health and safety. To date, the Company has mostly benefited from these laws and
regulations because of their impact on its clients, and the cost of the
Company's own compliance has not been material, but the fact that such laws and
regulations are changed frequently makes uncertain both the Company's future
benefits and costs associated with such laws and regulations. The modification
of existing laws or regulations or the adoption of new laws or regulations
affecting the Company's clients or its own operations or industry could
adversely affect the Company.

SIGNIFICANT INTANGIBLE ASSETS
   
     As a result of the Pending Acquisitions, goodwill accounts for a material
portion of the Company's total assets and stockholders' equity. On a pro forma
combined basis, as adjusted for the Offering, goodwill was recorded at $73.5
million at March 31, 1998, representing approximately 53.6% and 68.5% of the
Company's total assets and stockholders' equity, respectively. The Company may
also record additional goodwill and related amortization charges in connection
with the implementation of its acquisition strategy. Goodwill arises when an
acquirer pays more for a business than the fair value of the tangible and
separately measurable intangible net assets acquired. Generally accepted
accounting principles require that goodwill and all other intangible assets be
amortized over the period benefited, not to exceed 40 years. If management of an
acquiring company does not separately recognize a material intangible asset
having a benefit period less than 40 years, or does not give effect to shorter
benefit periods of factors giving rise to a material portion of the goodwill,
earnings reported in periods immediately following the acquisition of an
acquired business would be overstated. Further, in later years, the acquiring
company would be burdened by a continuing charge against earnings without the
associated benefit to income valued by management in arriving at the
consideration paid for the businesses. Earnings in later years also could be
significantly affected if management determined then that the remaining balance
of goodwill was impaired. The Company's management has determined that the
period benefited by the goodwill resulting from the Pending Acquisitions will be
no less than 40 years. In making such determination, management has reviewed
with its independent accountants all of the factors and related future cash
flows which it considered in arriving at the amount incurred to acquire each of
the Acquired Companies. Management concluded that the anticipated future cash
flows associated with the intangible assets recognized in the Pending
Acquisitions will continue indefinitely, and there is no persuasive evidence
that any material portion will dissipate over a period shorter than 40 years.
    
IMPACT OF YEAR 2000 COMPLIANCE

     The Company uses computer software programs and operating systems in its
internal operations, including applications used in financial business systems
and various administration functions, and also utilizes software programs in
providing certain engineering services and engineered systems. To the extent
that these software applications contain code that is unable to appropriately
interpret upcoming calendar year 2000, some level of modification of such source
code or applications will be necessary. Prior to the year 2000, the Company
expects to incur approximately $2.4 million of capital expenditures for new
computer software and hardware relating to financial reporting and certain
engineering applications, all of which will be year 2000 compliant. The Company
also expects to spend approximately $0.1 million for upgrades to certain
existing engineering software to ensure year 2000 compliance, which amounts will
be expensed in the period incurred. The Company is currently in the process of
evaluating its other computer software programs and operating systems to ensure
such programs and systems will be able to process

                                       12
<PAGE>
transactions in the year 2000. The Company does not believe that the costs to
modify its other programs or systems will be material to its financial condition
or results of operations. The Company does not currently have information
concerning the year 2000 compliance of its clients and suppliers. However, since
the Company does not generally interface its computer systems with its clients
or suppliers, the failure of the Company's clients and suppliers to achieve year
2000 compliance should not have a material adverse effect on the Company's
financial condition and results of operations.

SIGNIFICANT VOTING CONTROL BY EXISTING MANAGEMENT AND STOCKHOLDERS

     Upon closing of the Pending Acquisitions and the Offering, the respective
stockholders of Petrocon and the Acquired Companies, OEI's initial financing
source (Equus II) and the executive officers of OEI (all but one of whom is also
an executive officer of Petrocon), will beneficially own in the aggregate
approximately 63.7% of the outstanding Common Stock. If these persons were to
act in concert, they would be able to exercise control over the Company's
affairs, including the election of the entire Board of Directors and, subject to
Section 203 of the Delaware General Corporation Law (the "DGCL"), any matter
submitted to a vote of stockholders. See "Principal Stockholders."

POTENTIAL EFFECT OF SHARES ELIGIBLE FOR FUTURE SALE ON PRICE OF COMMON STOCK

     RESALES OF EXISTING SHARES.  Upon closing of the Pending Acquisitions and
the Offering, 11,835,494 shares of Common Stock will be outstanding. The
4,300,000 shares sold in the Offering (other than shares purchased by affiliates
of the Company) will be freely tradable. The remaining shares outstanding may be
resold publicly only following their effective registration under the Securities
Act of 1933, as amended (the "Securities Act"), or under an available
exemption from the registration requirements of the Securities Act, such as the
exemption provided by Securities Act Rule 144 promulgated by the Securities and
Exchange Commission (the "SEC"). Under Rule 144, all those remaining shares
will be eligible for Rule 144 sales, subject to certain volume limitations and
other requirements, on the day following the first anniversary of the date the
Offering closes. The holders of a substantial number of those remaining shares
have certain registration rights granted by OEI in connection with the Pending
Acquisitions, subject to a one-year lockup period.
   
     EXERCISES OF OPTIONS AND WARRANTS.  Upon closing of the Offering, options
and warrants to purchase up to a total of 2,122,802 shares of Common Stock will
be outstanding or allocated for grant, of which options and warrants to purchase
566,076 shares will be exercisable immediately after the closing. The Company
intends to register all the shares subject to options granted under the
Incentive Plan and the Company's 1998 Employee Stock Purchase Plan (the
"Employee Purchase Plan") under the Securities Act for public resale.
    
     LOCKUP ARRANGEMENTS.  OEI, the OEI directors, executive officers and
current stockholders (including Equus II) and all persons who acquire shares of
Common Stock in connection with the Pending Acquisitions have agreed not to
offer, sell or otherwise dispose of any shares for a period of one year
following the date of this Prospectus without the prior written consent of Smith
Barney Inc., except that the Company may issue, subject to certain conditions,
Common Stock in connection with acquisitions and pursuant to awards under the
Incentive Plan and the Employee Purchase Plan (see "Management -- Incentive
Plan"). Smith Barney, Inc. will evaluate various factors in determining whether
to consent to any proposed transfer during the two-year restriction period,
including the reason for the transfer, the number of shares requested to be
transferred, the potential effect of the transfer on the market price of the
Common Stock, the number of shares previously allowed to be transferred and
other relevant circumstances at the time of the transfer. In addition, under the
terms of the respective purchase agreements, persons receiving shares of Common
Stock in the Pending Acquisitions have agreed with OEI to similar transfer
restrictions for a period of one year following the date of this Prospectus.

     FUTURE REGISTRATIONS FOR ACQUISITIONS.  The Company intends to register
3,000,000 additional shares of Common Stock under the Securities Act during
1998, for use in connection with future acquisitions. These shares generally
will be freely tradable after their issuance by persons not affiliated with the

                                       13
<PAGE>
Company, unless the Company is able to contractually restrict their resale.
Sales of these shares during the Lockup Period would require the prior written
consent of Smith Barney, Inc.

     Availability for sale, or sale, of the shares of Common Stock eligible for
future sale could adversely affect the market price of the Common Stock from
time to time. See "Shares Eligible for Future Sale."

IMMEDIATE AND SUBSTANTIAL DILUTION

     Purchasers of Common Stock in the Offering (i) will experience immediate,
substantial dilution in the net tangible book value of their stock of $11.15 per
share and (ii) may experience further dilution in that value from future
issuances of shares of Common Stock. See "Dilution."

NO PRIOR MARKET; POSSIBLE VOLATILITY OF STOCK PRICE
   
     Before the Offering, no public market for the Common Stock has existed, and
the initial public offering price negotiated by the Company and the
representatives of the Underwriters may not be indicative of the price at which
the Common Stock will trade after the Offering. See "Underwriting" for the
factors to be considered in determining the initial public offering price. The
Company has been approved for listing of the Common Stock on the New York Stock
Exchange, subject to official notice of issuance, but no assurance can be given
that an active trading market for the Common Stock will develop or, if it does,
that it will continue after the Offering. The market price of the Common Stock
after the Offering may be subject to significant fluctuations from time to time
in response to many factors, including variations in the reported financial
results of the Company and changing conditions in the economy in general, in the
Company's industry in particular, or in the industry of one of the Company's
major client groups. In addition, the stock markets experience significant price
and volume volatility from time to time which may affect the market price of the
Common Stock for reasons unrelated to the Company or its performance.
    
POTENTIAL ANTI-TAKEOVER EFFECTS

     OEI's Certificate of Incorporation, as amended (the "Charter"),
authorizes the issuance, without stockholder approval, of one or more series of
preferred stock having such preferences, powers and relative, participating,
optional and other rights (including preferences over the Common Stock
respecting dividends, distributions and voting rights) as the board of directors
of OEI (the "Board of Directors") may determine. See "Description of Capital
Stock -- Preferred Stock."

     Certain provisions of the Charter, OEI's bylaws and the DGCL may delay,
discourage, inhibit, prevent or render more difficult an attempt to obtain
control of the Company, whether by means of a tender offer, business
combination, proxy contest or otherwise. These provisions include the Charter
authorization of "blank check" preferred stock, classification of the Board of
Directors, a limitation on the removal of directors only for cause, and then
only on approval of holders of two-thirds of the outstanding voting stock, a
restriction on the ability of stockholders to take actions by written consent
and a DGCL restriction on business combinations with certain interested parties.
See "Description of Capital Stock."

FORWARD-LOOKING STATEMENTS

     With the exception of historical information, the matters discussed in this
Prospectus may include forward-looking statements that involve risks and
uncertainties. Discussions containing such forward-looking statements may be
found in the material set forth under "Prospectus Summary," "Risk Factors,"
"Management's Discussion and Analysis of Financial Condition and Results of
Operations," "Business," "Business -- Business Strategy,"
"Business -- Acquisition Strategy," "Business -- Business Development and
Marketing" and "Business -- Clients," as well as in this Prospectus
generally. While forward-looking statements are sometimes presented with
numerical specificity, they are based on a variety of assumptions made by
management regarding future circumstances over which the Company has little or
no control. A number of important factors, including those identified in this
paragraph or discussed elsewhere in this Prospectus, could cause the Company's
actual results to differ materially from those depicted in forward-looking
statements or financial information. Actual results may differ from
forward-looking results for a number of reasons, including the following: (i)
changes in world economic conditions (including, but

                                       14
<PAGE>
not limited to, the potential instability of governments and legal systems in
countries in which the Company conducts business, and significant changes in
energy prices and currency valuations); (ii) changes in client demands as they
affect levels of capital and maintenance expenditures (including, but not
limited to, the effect of strikes at clients' facilities, variations in backlog
and the impact of changes in business cycles); (iii) competitive factors
(including, but not limited to, changes in client contract terms and procedures
and the introduction of new design and other processes by existing and new
competitors); (iv) changes in operating costs (including, but not limited to,
the effect of changes in the Company's engineering processes, changes in costs
associated with varying levels of operations, changes resulting from different
levels of clients' demands and changes in cost of labor and benefits); (v) the
success of the Company's operating plan (including, but not limited to, its
ability to achieve the total planned benefits of its strategic plan, its ability
to integrate acquisitions into Company operations, and the ability of recently
acquired companies to achieve satisfactory operating results); and (vi)
unanticipated litigation, claims or assessments (including, but not limited to,
claims or problems related to contract, professional errors and omissions and
other liability claims).

                                       15
<PAGE>
                                  THE COMPANY

     OEI was formed in October 1997 by Petrocon's management to conduct the
Offering, simultaneously consummate the Pending Acquisitions and continue
Petrocon's successful acquisition program. Petrocon is a multidisciplined
engineering company, which provides a full range of process, civil, structural,
mechanical, instrument and electrical engineering and design services,
principally to the oil and gas, petroleum processing and pulp and paper
industries both domestically and abroad. Petrocon also designs, engineers,
programs and installs automated control systems for specific applications,
primarily for the downstream petroleum and chemical processing industries.
Petrocon, formed in 1988, is headquartered in Beaumont, Texas, with offices in
Houston, Texas, Lake Charles and Baton Rouge, Louisiana, Saudi Arabia and Abu
Dhabi. At March 31, 1998, Petrocon had approximately 1,171 employees, including
839 engineers, designers and draftsmen and 124 construction managers, inspectors
and technicians. Petrocon has experienced significant growth in its ten-year
history, having increased its revenues from approximately $4.0 million in 1988,
to approximately $92.6 million in 1997, in large part through acquisitions.
Since 1988, Petrocon has made more than 13 acquisitions, gaining in the process
valuable experience in negotiating, closing and successfully integrating
acquisitions. According to ENR'S 1997 ranking of the top 500 engineering and
design firms in the United States, Petrocon ranked 58th in terms of client
billings.

     Concurrently with, and as a condition to, the closing of the Offering, OEI
will consummate the Pending Acquisitions. For a description of the transactions
in which Petrocon and the Acquired Companies will be acquired and the
consideration to be paid by OEI for each of them, see "-- Summary of Terms of
the Pending Acquisitions" and "Certain Transactions -- Organization of OEI."
The Acquired Companies are:

     PS&S:  Paulus, Sokolowski and Sartor, Inc. ("PS&S") provides total
design, engineering, geotechnical and environmental services to the
pharmaceutical, industrial, entertainment and utility industries, as well as to
commercial, institutional and public sector clients in the United States and
abroad. PS&S was founded in 1962 and is headquartered in Warren, New Jersey,
with regional offices in Atlantic City, New Jersey and Tampa, Florida. At March
31, 1998, PS&S's staff consisted of approximately 204 employees, including over
160 engineers, designers and draftsmen. For 1997, PS&S had revenues of
approximately $21.7 million and was ranked 253rd, based on client billings, in
ENR'S ranking of the top 500 engineering and design firms in the United States.

     GEI:  Gulsby Engineering, Inc. (together with its subsidiary, "GEI")
designs, engineers, builds and installs modular processing plants for the oil
and gas industry. GEI was founded in 1977 and maintains its offices and
fabrication facilities in Houston, Texas. While GEI specializes in cryogenic
turbo-expander units which employ extremely low temperatures in the processing
of natural gas, it also designs and fabricates a large range of modular
treatment and processing facilities for the refining and petrochemical
industries, including plants for gas treatment, sulfur, dehydration and
fractionation, crude stabilization and production, MTBE, waste heat recovery,
cogeneration and amine treatment. At March 31, 1998, GEI's staff consisted of
approximately 25 employees, including a team of 7 chemical, electrical and
mechanical engineers and designers. For 1997, GEI had revenues of approximately
$18.3 million.

     W-I:  W-Industries, Inc. ("W-I") designs, engineers, assembles, programs
and installs control and instrumentation systems for specific applications in
the upstream and offshore oil and gas and processing industries, including both
conventional pneumatic and hydraulic control systems and sophisticated
microprocessor-based controls employing programmable logic. W-I was founded in
1984 and maintains its headquarters and engineering and assembly plant
facilities in Houston, Texas. At March 31, 1998, W-I's staff consisted of
approximately 103 employees, including 17 engineers and designers representing
the instrument, electrical and mechanical disciplines. For 1997, W-I had
revenues of approximately $20.6 million.

                                       16
<PAGE>
     C&I:  Chemical & Industrial Engineering, Inc. ("C&I") provides full
engineering, procurement and construction management services, with
state-of-the-art 3D modeling capabilities, principally to the refining,
chemical, food and beverage, pharmaceutical and utility industries, both
domestically and internationally. C&I was founded in 1983 and maintains its
executive and engineering offices in Louisville, Kentucky. At March 31, 1998,
C&I's staff consisted of approximately 107 employees, including approximately 79
engineers. For 1997, C&I had revenues of approximately $15.9 million and was
ranked 338th, based on client billings, in ENR'S 1997 ranking of the top 500
engineering and design firms in the United States.
   
     SUMMARY OF TERMS OF THE PENDING ACQUISITIONS:  Subject to certain
adjustments described below, the aggregate consideration payable to consummate
the Pending Acquisitions consists of (i) approximately $27.8 million in cash,
(ii) 5,053,027 shares of Common Stock, (iii) 654,099 shares of Common Stock and
approximately $3.4 million, which will be placed in escrow, and which will be
subject to a maximum three-year earnout arrangement with respect to one of the
Pending Acquisitions, (iv) options to purchase 768,384 shares of Common Stock to
be issued in connection with the Petrocon acquisition (the "Replacement
Options") and (v) warrants to purchase 357,579 shares of Common Stock to be
issued in connection with the Petrocon acquisition (the "Replacement
Warrants").

     The Company will assume and repay upon or shortly after the Closing of the
Offering, certain of the then outstanding indebtedness of Petrocon and the
Acquired Companies, which as of March 31, 1998 aggregated approximately $28.7
million ($21.8 million of which will be repaid from proceeds of the Offering and
$1.4 million of which will be repaid from cash on hand), attributable as
follows: Petrocon -- $16.4 million; PS&S -- $3.2 million; GEI -- $4.6 million;
W-I -- $4.3 million; and C&I -- $0.1 million. Of the $4.6 million of GEI
indebtedness, approximately $3.0 million is payable to the GEI stockholders
relating to the June 1998 settlement of a legal judgment entered against GEI.
Under the GEI acquisition agreement, the GEI stockholders are entitled to
receive on the closing of the Pending Acquisitions the excess of the amount
accrued for this legal judgment at December 31, 1997 over the settlement amount.
See Notes 8 and 10 to the Consolidated Financial Statements of GEI. The Company
will also repay to Equus II funds advanced to OEI to pay expenses of the
Offering (estimated to be approximately $2.5 million as of the closing of the
Offering). Before the closing of the Pending Acquisitions, W-I and PS&S, each of
which is an S corporation, are expected to distribute cash to their respective
stockholders in amounts accumulated in their respective accumulated adjustment
accounts ("AAA accounts") after December 31, 1997. An AAA account generally
represents undistributed earnings of an S corporation on which taxes have been
or will be paid by its stockholders. Before the closing of the Pending
Acquisitions, certain of the Acquired Companies will make other distributions to
their stockholders of certain assets and related liabilities with an aggregate
net book value of approximately $9.1 million.
    
     The Replacement Options and Replacement Warrants to be issued in the
Petrocon acquisition will replace options and warrants to purchase shares of
Petrocon common stock granted to employees and issued in connection with a prior
Petrocon acquisition. The aggregate purchase price which would have otherwise
been payable for Petrocon has been reduced by $4.2 million as a result of the
grant of the Replacement Options and Replacement Warrants.

     The purchase price for Petrocon was reduced by $2.0 million based on a
negotiated discounted value of projected annual earnout payments due by Petrocon
to the former shareholders of RPM Engineering, Inc. ("RPM") through 2001 in
connection with the RPM acquisition in October 1996. The additional earnout
payments, if any, will be accounted for as additional goodwill and amortized
over the applicable amortization period. See Note 15 to the Notes to the
Petrocon Consolidated Financial Statements.

     A portion of the purchase price for GEI will be subject to a maximum
three-year earnout arrangement. Upon the closing of the GEI acquisition,
approximately $3.4 million in cash and 654,099 shares of Common Stock will be
placed in escrow and held for subsequent distribution to the former GEI
stockholders, or returned to the Company, depending on the future financial
performance of GEI. Distributions from the

                                       17
<PAGE>
escrow will be made annually to the former GEI stockholders if certain
cumulative financial performance thresholds are achieved by GEI within the
three-year period, or earlier if those thresholds are achieved sooner. The
additional earnout payments, if any, will be accounted for as additional
goodwill and amortized over the applicable amortization period. Any escrowed
stock and cash not distributed to the former GEI stockholders after three years
will be returned by the escrow agent to the Company.

     The consideration being paid by the Company for each Acquired Company was
determined by customary and usual negotiations between the Company and
representatives of that Acquired Company. The consideration being paid for
Petrocon was determined using the same valuation methodology used to negotiate
the consideration being paid to the stockholders of the Acquired Companies,
except that in the determination of the Petrocon consideration, a higher pricing
multiple was applied to Petrocon's adjusted earnings. See "Certain
Transactions."

     The closing of each Pending Acquisition is subject to customary conditions.
They include, among others: the continuing accuracy of the respective
representations and warranties made by Petrocon and the Acquired Companies,
their respective principal stockholders and OEI; the performance of each of
their respective covenants included in the agreements relating to the Pending
Acquisitions; and the absence of a material adverse change in the results of
operations, financial condition or business of Petrocon and each Acquired
Company.

     No assurance can be given that the conditions to the closing of all the
Pending Acquisitions will be satisfied or waived or that each of the Pending
Acquisitions will close. For information regarding the employment agreements to
be entered into by certain key officers of Petrocon and the Acquired Companies,
see "Management -- Employment Agreements."

     STRATEGIC BENEFITS OF ACQUIRED COMPANIES:  The Company believes the
Acquired Companies provide the following strategic benefits, among others: PS&S
provides the Company with additional engineering services expertise in the
geotechnical and environmental disciplines, as well as broadening the Company's
client base to include the pharmaceutical and entertainment industries. GEI
contributes modular plant systems expertise, which the Company believes can be
cross-marketed to clients of certain of the other operating companies. W-I
enhances the Company's control systems capabilities, while at the same time
expanding the Company's client base into the upstream oil and gas market. C&I
expands the geographic coverage of the Company's engineering services segment,
broadens the Company's client base into the food and beverage and pharmaceutical
industries and provides the Company with state-of-the-art 3D modeling
capabilities that can be utilized at other operating companies.

                                       18
<PAGE>
                                USE OF PROCEEDS

     The net proceeds to the Company from the sale of the shares of Common Stock
offered by this Prospectus, after deducting underwriting discounts and
commissions and estimated offering expenses payable by the Company (including
the repayment of approximately $2.5 million of advances by Equus II to fund a
portion of the Offering expenses), are estimated to be approximately $53.0
million (approximately $61.4 million if the Underwriters exercise their
over-allotment option in full), assuming an initial public offering price of
$14.00 per share (the midpoint of the estimated initial public offering price
range). Of the net Offering proceeds, approximately $27.8 million will be used
to pay the cash portion of the purchase prices for the Pending Acquisitions,
approximately $21.8 million will be used concurrently for the repayment of
certain outstanding indebtedness of Petrocon and the Acquired Companies
(excluding the repayment of the $2.5 million of advances by Equus II referred to
above) and approximately $3.4 million will be placed in escrow with respect to
one of the Pending Acquisitions. See "The Company -- Summary of Terms of the
Pending Acquisitions" and "Certain Transactions -- Organization of OEI."

     The indebtedness to be repaid from the proceeds of the Offering (some of
which has been guaranteed by stockholders of the Acquired Companies) bears
interest at rates ranging from 5.9% to 10.0% per annum. Such indebtedness would
otherwise mature at various dates through January 2004.

                                DIVIDEND POLICY

     It is the Company's current intention to retain earnings to finance the
expansion of its business. Any future dividends will be at the discretion of the
Board of Directors after taking into account various factors, including, among
others, the Company's financial condition, results of operations, cash flows
from operations, current and anticipated cash needs and expansion plans, the
income tax laws then in effect, the requirements of Delaware law, the
restrictions imposed by the New Credit Facility and any restrictions that may be
imposed by the Company's future credit facilities. The Company expects that its
New Credit Facility will require compliance with various loan covenants,
including restrictions on the payment of dividends. See "Management's
Discussion and Analysis of Financial Condition and Results of Operations -- Pro
Forma Combined -- Liquidity and Capital Resources."

                                       19
<PAGE>
                                 CAPITALIZATION

     The following table sets forth the short-term debt and current maturities
of long-term obligations and capitalization as of March 31, 1998 of the Company
on a pro forma combined basis: (i) giving effect to the Pending Acquisitions and
the net incurrence of indebtedness by the Company since March 31, 1998; and (ii)
as adjusted giving effect to the Offering and the application of the estimated
net proceeds therefrom. See "Use of Proceeds" and Unaudited Pro Forma Combined
Financial Statements and the related notes thereto included elsewhere in this
Prospectus.

                                                MARCH 31, 1998
                                           ------------------------
                                           PRO FORMA
                                           COMBINED     AS ADJUSTED
                                           ---------    -----------
                                                (IN THOUSANDS)
Short-term debt and current maturities
  of long-term obligations(1)...........    $53,540      $   5,832
                                           =========    ===========
Long-term obligations, less current
  maturities............................    $ 3,350      $  --
                                           ---------    -----------
Stockholders' equity:
     Preferred stock: $.001 par value
       1,000,000 authorized; none issued
       and outstanding..................      --            --
     Common stock: $.001 par value
       40,000,000 shares authorized;
       7,535,494 outstanding pro forma;
       and 11,835,494 outstanding, as
       adjusted(2)......................          8             12
     Additional paid-in capital.........     48,654        101,636
     Retained earnings..................      5,589          5,589
                                           ---------    -----------
          Total stockholders' equity....     54,251        107,237
                                           ---------    -----------
          Total capitalization..........    $57,601      $ 107,237
                                           =========    ===========

- ------------

(1) The pro forma combined balance includes $27.8 million of cash consideration
    payable in connection with the Pending Acquisitions.

(2) Includes an aggregate 654,099 shares which will be placed in escrow and will
    be subject to a maximum three-year earnout arrangement with respect to one
    of the Pending Acquisitions (see "The Company -- Summary of Terms of the
    Pending Acquisitions"), and excludes (i) an aggregate of 1,765,223 shares
    subject to options to be granted or allocated for grant on or prior to the
    closing of the Offering under the Incentive Plan, 996,839 of which will have
    an exercise price equal to the initial public offering price per share and
    768,384 of Replacement Options which will have a weighted average exercise
    price per share of $7.68, and (ii) an aggregate of 357,579 shares subject to
    the Replacement Warrants to be issued in connection with the Petrocon
    acquisition and which have an exercise price per share of $9.42. See
    "Management -- Incentive Plan," "Certain Transactions -- Organization of
    OEI" and "The Company -- Summary of Terms of the Pending Acquisitions."

                                       20
<PAGE>
                                    DILUTION

     The deficit in pro forma combined net tangible book value of the Company as
of March 31, 1998 was approximately $19.2 million, or approximately $2.55 per
share, after giving effect to the Pending Acquisitions and the net incurrence of
indebtedness by the Company since March 31, 1998. The deficit in pro forma net
tangible book value per share represents the amount by which the Company's pro
forma total liabilities exceeded the Company's pro forma net tangible assets as
of March 31, 1998, divided by the number of shares to be outstanding after
giving effect to the Pending Acquisitions. After giving effect to the sale of
the 4,300,000 shares offered hereby and deducting the estimated underwriting
discounts and commissions and estimated offering expenses payable by the
Company, the Company's pro forma net tangible book value as of March 31, 1998
would have been approximately $33.8 million, or approximately $2.85 per share,
based on an assumed initial public offering price of $14.00 per share (the
midpoint of the estimated initial public offering price range). This represents
an immediate increase in pro forma net tangible book value of approximately
$5.40 per share to existing stockholders and an immediate dilution of
approximately $11.15 per share to new investors purchasing shares in the
Offering. The following table illustrates this per share pro forma dilution:

Initial public offering price per
share................................             $   14.00
     Pro forma net tangible book
      value (deficit) per share
      before the Offering............  $   (2.55)
     Increase in pro forma tangible
      value attributable to new
      investors......................       5.40
Pro forma net tangible book value per
share after the Offering.............                  2.85
                                                  ---------
Dilution per share to new
investors............................             $   11.15
                                                  =========

     The following table sets forth, on a pro forma basis to give effect to the
Pending Acquisitions and the closing of the Offering and the application of the
estimated net proceeds therefrom as of March 31, 1998, the number of shares of
Common Stock purchased from the Company, the total consideration paid to the
Company and the average price per share paid to the Company by existing
stockholders (including persons acquiring Common Stock in the Pending
Acquisitions) and the new investors purchasing shares of Common Stock in the
Offering (before deducting the underwriting discounts and commissions and
estimated offering expenses):
<TABLE>
<CAPTION>
                                                                         TOTAL
                                           SHARES PURCHASED         CONSIDERATION(1)       AVERAGE
                                        ----------------------    --------------------      PRICE
                                          NUMBER      PERCENT      AMOUNT     PERCENT     PER SHARE
                                        ----------    --------    --------    --------    ----------
<S>                                      <C>             <C>      <C>          <C>          <C>    
Existing stockholders................    7,535,494       63.7%    $(19,203)    (46.8)%      $(2.55)
New investors........................    4,300,000       36.3       60,200      146.8        14.00
                                        ----------    --------    --------    --------
          Total......................   11,835,494      100.0%    $ 40,997      100.0%
                                        ==========    ========    ========    ========
</TABLE>
- ------------

(1) Total consideration paid by existing stockholders represents the pro forma
    stockholders' equity of the Company less pro forma goodwill before giving
    effect to the post-merger adjustments set forth on the Unaudited Pro Forma
    Combined Balance Sheet included herein.

                                       21
<PAGE>
           SELECTED HISTORICAL AND PRO FORMA COMBINED FINANCIAL DATA
                     (IN THOUSANDS, EXCEPT PER SHARE DATA)

     The Company will consummate the Pending Acquisitions concurrently with, and
as a condition to, the consummation of the Offering. For financial statement
presentation purposes, Petrocon is deemed to be the accounting acquirer. The
following selected historical financial data of Petrocon for the years ended
December 31, 1995, 1996 and 1997, and as of December 31, 1996 and 1997, have
been derived from the audited consolidated financial statements of Petrocon
included elsewhere in this Prospectus. The following selected historical
financial data for Petrocon for the years ended December 31, 1993 and 1994 and
the three months ended March 31, 1997 and 1998, and as of December 31, 1993,
1994 and 1995 and March 31, 1998, have been derived from unaudited consolidated
financial statements of Petrocon which have been prepared on the same basis as
the audited financial statements and, in the opinion of Petrocon, reflect all
adjustments, consisting of normal recurring adjustments, necessary for a fair
presentation of such data. The following summary unaudited pro forma combined
financial data gives effect to the Pending Acquisitions and certain other pro
forma adjustments and is adjusted to reflect the consummation of the Offering
and the application of the estimated net proceeds therefrom. See the Unaudited
Pro Forma Combined Financial Statements and the notes thereto included in this
Prospectus.
   
<TABLE>
<CAPTION>
                                                                        PETROCON                                     PRO FORMA
                                       ---------------------------------------------------------------------------  COMBINED(1)
                                                                                               THREE MONTHS ENDED   ------------
                                                      YEAR ENDED DECEMBER 31,                      MARCH 31,         YEAR ENDED
                                       -----------------------------------------------------  --------------------  DECEMBER 31,
                                         1993       1994       1995       1996       1997       1997       1998         1997
                                       ---------  ---------  ---------  ---------  ---------  ---------  ---------  ------------
<S>                                    <C>        <C>        <C>        <C>        <C>        <C>        <C>         <C>       
STATEMENT OF OPERATIONS DATA:
  Revenues...........................  $  48,113  $  51,524  $  52,386  $  61,851  $  92,616  $  19,496  $  25,915   $  169,065
                                       ---------  ---------  ---------  ---------  ---------  ---------  ---------  ------------
  Gross profit.......................      9,162      9,317     10,242     12,599     20,923      4,017      5,394       51,204
  General and administrative
   expenses..........................      7,989      7,274      8,336      9,498     15,062      3,233      3,689       30,903 (2)
  Goodwill amortization..............     --         --             23         79        254         85        103        1,858 (3)
                                       ---------  ---------  ---------  ---------  ---------  ---------  ---------  ------------
  Income from operations.............      1,173      2,043      1,883      3,022      5,607        699      1,602       18,443
  Interest income (expense), net.....       (291)      (358)      (456)      (592)    (1,569)      (350)      (386)        (446)(4)
  Other income (expense), net........        (93)       739        382         86        290         88        (65)         421
                                       ---------  ---------  ---------  ---------  ---------  ---------  ---------  ------------
  Income from continuing operations
   before provision for income
   taxes.............................        789      2,424      1,809      2,516      4,328        437      1,151       18,418
  Provision for income taxes.........        307        720        599      1,051      1,574        159        479        8,010
                                       ---------  ---------  ---------  ---------  ---------  ---------  ---------  ------------
  Income from continuing
   operations........................  $     482  $   1,704  $   1,210  $   1,465  $   2,754  $     278  $     672   $   10,408
                                       =========  =========  =========  =========  =========  =========  =========  ============
  Income per share from continuing
   operations
    Basic............................                                                                                $      .88
                                                                                                                    ============
    Diluted..........................                                                                                $      .85
                                                                                                                    ============
  Shares used in computing pro forma
   income per share from continuing
   operations
    Basic............................                                                                                11,835,494 (4)
                                                                                                                    ============
    Diluted..........................                                                                                12,299,454 (4)
                                                                                                                    ============
</TABLE>
                                       THREE MONTHS
                                           ENDED
                                         MARCH 31,
                                           1998
                                       -------------
STATEMENT OF OPERATIONS DATA:
  Revenues...........................   $    42,184
                                       -------------
  Gross profit.......................        12,183
  General and administrative
   expenses..........................         8,536 (2)
  Goodwill amortization..............           504 (3)
                                       -------------
  Income from operations.............         3,143
  Interest income (expense), net.....          (196)
  Other income (expense), net........           (51)
                                       -------------
  Income from continuing operations
   before provision for income
   taxes.............................         2,896
  Provision for income taxes.........         1,319
                                       -------------
  Income from continuing
   operations........................   $     1,577
                                       =============
  Income per share from continuing
   operations
    Basic............................   $       .13
                                       =============
    Diluted..........................   $       .13
                                       =============
  Shares used in computing pro forma
   income per share from continuing
   operations
    Basic............................    11,835,494 (4)
                                       =============
    Diluted..........................    12,299,454 (4)
                                       =============
    
<TABLE>
<CAPTION>
                                                                      PETROCON
                                          ----------------------------------------------------------------     MARCH 31,
                                                                                                                 1998
                                                              DECEMBER 31,                                   -------------
                                          -----------------------------------------------------  MARCH 31,     PRO FORMA
                                            1993       1994       1995       1996       1997       1998      COMBINED (1)
                                          ---------  ---------  ---------  ---------  ---------  ---------   -------------
<S>                                       <C>        <C>        <C>        <C>        <C>         <C>          <C>       
BALANCE SHEET DATA:
  Working capital (deficit).............  $      73  $   1,044  $   2,402  $  (1,482) $  (3,807)  $(3,610)     $ (32,556)
  Total assets..........................     21,013     18,007     20,014     26,377     41,903    42,864        135,845
  Total debt, including current
   portion..............................      4,950      5,121      5,495     11,865     16,445    16,435         56,890
  Stockholders' equity..................      3,331      4,271      3,865      6,753     13,919    14,638         54,251
</TABLE>
                                               AS
                                          ADJUSTED (5)
                                          ------------
BALANCE SHEET DATA:
  Working capital (deficit).............    $ 17,080
  Total assets..........................     137,017
  Total debt, including current
   portion..............................       5,832
  Stockholders' equity..................     107,237

                                                   (FOOTNOTES ON FOLLOWING PAGE)

                                       22
<PAGE>
- ------------

(1) The pro forma combined statement of operations data assume that the
    following transactions and events were consummated on January 1, 1997: (i)
    the organization of OEI and its initial issuance of shares of Common Stock;
    (ii) a 1,828.368-for-one split of the outstanding Common Stock; (iii) the
    Pending Acquisitions; and (iv) the closing of the Offering and the
    application of its estimated net proceeds, and are not necessarily
    indicative of the results the Company would have obtained had these events
    actually occurred at that date or of the Company's future results. The pro
    forma combined balance sheet data assume that items (i), (ii) and (iii)
    above occurred on March 31, 1998 and that the net indebtedness incurred by
    the Company since March 31, 1998 occurred and existed on that date. The pro
    forma combined financial data (i) are based on preliminary estimates,
    available information and certain assumptions that management deems
    appropriate and (ii) should be read in conjunction with the other financial
    statements and notes thereto included elsewhere in this Prospectus.
   
(2) The pro forma combined statement of operations data include the effect of:
    (i) a reduction in compensation and benefits of approximately $2.7 million
    for the year ended December 31, 1997 agreed to as part of the purchase
    agreements by certain owners and key employees of the Acquired Companies
    pursuant to the Pending Acquisitions; (ii) the elimination of a non-cash,
    non-recurring compensation charge of approximately $0.5 million by the
    Company for the three months ended March 31, 1998; and (iii) distributions
    by certain Acquired Companies of certain assets prior to the closing of the
    Pending Acquisitions. The Unaudited Pro Forma Combined Financial Statements
    do not reflect other potential cost savings, revenue growth or costs
    associated with being a public company.
    
(3) Reflects amortization of the goodwill to be recorded over a 40-year period
    as a result of the Pending Acquisitions.

(4) Computed on a basis described in Note 4 of Notes to the Unaudited Pro Forma
    Combined Financial Statements.

(5) Reflects the closing of the Offering and the Company's application of the
    net proceeds therefrom and repayment of $1.4 million at March 31, 1998 of
    Petrocon indebtedness from cash on hand. See "Use of Proceeds."

                                       23
<PAGE>
          MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION
                           AND RESULTS OF OPERATIONS

     The following discussion should be read in conjunction with the financial
statements and related notes thereto and "Selected Historical and Pro Forma
Combined Financial Data" appearing elsewhere in this Prospectus.

INTRODUCTION

     The Company's revenues are primarily derived from engineering, design and
related services provided to its clients. Direct costs consist primarily of
labor, material and other related expenses necessary to complete the various
engineering and design projects. General and administrative expenses consist
primarily of executive compensation and related benefits, administrative
salaries and benefits, office supplies, rent, utilities, insurance and
professional fees.

     Petrocon and the Acquired Companies have been managed throughout the
periods discussed below as independent private companies, and their results of
operations reflect different tax structures (S corporations and C corporations),
which have influenced, among other things, their historical levels of owners'
compensation. Some owners of these companies and certain key employees have
prospectively agreed to certain reductions in their compensation and benefits in
connection with the Pending Acquisitions.

     OEI has conducted no operations to date other than in connection with the
Offering and the Pending Acquisitions. The Company intends to integrate these
businesses and their operations and administrative functions. The integration
process may present opportunities to reduce costs through the elimination of
duplicate functions and through economies of scale, but will necessitate
additional costs and expenditures for corporate management and administration.
The Company will also incur corporate expenses related to being a public
company, implementation of an acquisition program and systems integration. These
various costs and possible cost-savings may make comparison of historical
operating results not comparable to, nor indicative of, future performance. No
such cost savings were reflected in the pro forma combined statement of
operations data, except for compensation reductions provided for in the
agreements entered into in connection with certain of the Pending Acquisitions
and other known cost eliminations.
   
     In March 1998, OEI sold 36,564 shares of Common Stock to a new member of
management. As a result, the Company recorded a non-recurring, non-cash
compensation charge of $0.5 million in the first quarter of 1998, representing
the difference between the amount paid for the shares and the estimated fair
value of the shares, which value has been discounted from the estimated initial
public offering price due primarily to restrictions on the sale and
transferability of the shares issued.

     In July 1996, the SEC issued Staff Accounting Bulletin No. 97 ("SAB 97")
relating to business combinations immediately prior to an initial public
offering. SAB 97 requires that these combinations be accounted for using the
purchase method of accounting. Under the purchase method, the owners of the
company that receive the largest portion of voting rights in the combined
enterprise as a result of the Pending Acquisitions are presumed to be the
accounting acquirer. Accordingly, Petrocon has been designated as the accounting
acquirer. Goodwill totalling approximately $64.2 million will be recorded on the
Company's balance sheet in connection with the Pending Acquisitions, $46.5
million of which represents the excess of the fair value of the merger
consideration to be paid for the Acquired Companies over the fair value of the
net assets to be acquired. This goodwill will be amortized over a 40-year period
as a non-cash charge to the Company's statements of operations. The pro forma
impact of this amortization expense, which is non-deductible for federal income
tax purposes, is $1.6 million per year on an after-tax basis.

     In addition, upon consummation of the Pending Acquisitions, the Company
will record a $7.7 million non-recurring, non-cash compensation charge related
to an aggregate of 609,395 shares of Common Stock owned by management, which
shares were sold by OEI to them in October 1997 and March 1998. The charge
represents the difference between the amount paid for the shares and the
estimated fair value of the shares based on a discount from the estimated
initial offering price due primarily to restrictions on the sale of the shares
issued. The charge will be reflected in the Company's historical income
statement for the
    
                                       24
<PAGE>
   
quarter in which the Pending Acquisitions occur, and for the year 1998, and will
not be deductible for federal income tax purposes. The issuances of the
management shares were made in contemplation of the Offering and the Pending
Acquisitions, and no further stock issuance of this nature are anticipated.
    
PRO FORMA COMBINED -- LIQUIDITY AND CAPITAL RESOURCES
   
     At March 31, 1998, on a pro forma combined basis, after giving effect to
(i) the net incurrence of indebtedness by the Company since March 31, 1998, (ii)
the Pending Acquisitions, (iii) the closing of the Offering and the Company's
application of the net proceeds therefrom to repay certain indebtedness of
Petrocon and the Acquired Companies (approximately $21.8 million), (iv) the
repayment of an additional 1.4 million of Petrocon indebtedness from cash on
hand and (v) $1.0 million of advances by Equus II, which have been used to pay a
portion of the expenses of the Offering (which advances are estimated to
aggregate $2.5 million at the time the Offering closes), the Company would have
had an aggregate of $3.5 million of cash and short-term investments, $17.1
million of working capital and no long-term debt obligations.
    
     The Company has recently received a commitment letter from Bank One, Texas,
N.A. to provide the New Credit Facility, which would be available upon the
closing of the Offering. According to the proposed New Credit Facility terms,
the Company would have a line of credit from $50.0 million to $75.0 million,
depending on syndication subscriptions, which may be used for general corporate
purposes, including refinancing of certain indebtedness of Petrocon and the
Acquired Companies, acquisitions, capital expenditures and working capital. The
New Credit Facility will be secured by a pledge of the capital stock of all
OEI's domestic subsidiaries and a negative pledge of the Company's assets. The
New Credit Facility will require compliance with various affirmative and
negative covenants, including, among others, (i) maintenance of certain
financial ratios, (ii) a restriction on additional indebtedness and (iii)
restrictions on liens, guarantees, advances, dividends and business activities
unrelated to the Company's existing operations. Failure to comply with such
covenants and restrictions would constitute a default under the New Credit
Facility. The New Credit Facility is subject to negotiation of definitive
documentation and certain other customary conditions, and there can be no
assurance that the Company will be able to obtain the New Credit Facility on
terms acceptable to the Company.

     The Company intends to pursue further acquisition opportunities. The
Company expects to fund future acquisitions through the issuance of additional
Common Stock, borrowings (including amounts available under the New Credit
Facility) and cash flow from operations. To the extent the Company funds a
significant portion of the consideration for future acquisitions with cash, it
may have to increase the amount available under the New Credit Facility or
obtain other sources of financing. There can be no assurance such financing will
be available on terms acceptable to the Company. The Company expects that its
cash flow from operations will provide cash sufficient to meet the Company's
normal working capital needs, debt service requirements and planned capital
expenditures for property and equipment (exclusive of acquisitions of other
businesses) for at least the next several years. On a combined basis, the
Company made capital expenditures for property and equipment of approximately
$1.6 million and $1.9 million in 1996 and 1997, respectively. The Company's
capital expenditures for 1998 are expected to be approximately $2.0 million,
primarily for computer equipment and software, excluding capital expenditures
for acquisitions.

     Due to the relatively low levels of inflation experienced in 1997,
inflation did not have a significant effect on the pro forma combined results of
operations of the Company in that period.

SEASONALITY

     The Company historically has experienced quarterly fluctuations in
revenues, operating income and cash flows. In recent years, the Company has
experienced greater revenue, operating income and cash flows in the second and
third calendar quarters as compared with the other two calendar quarters,
primarily as a result of holidays and inclement weather during the first and
fourth calendar quarters and delays in expenditures until after completion of
the Company's clients annual budgeting process, which normally occurs during the
first calendar quarter.

                                       25
<PAGE>
IMPACT OF YEAR 2000

     Prior to the year 2000, the Company expects to incur approximately $2.4
million of capital expenditures for new computer software and hardware relating
to financial reporting and certain engineering applications, all of which
software will be year 2000 compliant. The Company also expects to spend
approximately $0.1 million for upgrades to certain existing engineering software
to ensure year 2000 compliance, which amounts will be expensed in the period
incurred. The Company is currently in the process of evaluating its other
computer software programs and operating systems to ensure such programs and
systems will be able to process transactions in the year 2000. The Company does
not believe that the costs to modify these other programs or systems will be
material to its financial condition or results of operations. The Company does
not currently have information concerning the year 2000 compliance of its
clients and suppliers. However, since the Company does not generally interface
its computer systems with its client or suppliers, the failure of the Company's
clients and suppliers to achieve year 2000 compliance could have a material
adverse effect on the Company's financial condition and results of operations.

PETROCON -- RESULTS OF OPERATIONS

     The following table sets forth, for the periods indicated, the percentage
relationship that certain items in Petrocon's Consolidated Statements of Income
bear to revenues:
<TABLE>
<CAPTION>
                                                                                                             THREE MONTHS ENDED
                                                              YEAR ENDED DECEMBER 31,                            MARCH 31,
                                          ----------------------------------------------------------------  --------------------
                                                  1995                  1996                  1997                  1997
                                          --------------------  --------------------  --------------------  --------------------
                                                            (DOLLARS IN THOUSANDS)             (UNAUDITED)
<S>                                       <C>            <C>    <C>            <C>    <C>            <C>    <C>            <C>   
Revenues................................  $  52,386      100.0% $  61,851      100.0% $  92,616      100.0% $  19,496      100.0%
Direct costs............................     42,144       80.4     49,252       79.6     71,693       77.4     15,479       79.4
                                          ---------  ---------  ---------  ---------  ---------  ---------  ---------  ---------
Gross profit............................     10,242       19.6     12,599       20.4     20,923       22.6      4,017       20.6
General and administrative expenses.....      8,359       16.0      9,577       15.5     15,315       16.6      3,318       17.0
                                          ---------  ---------  ---------  ---------  ---------  ---------  ---------  ---------
Income from operations..................      1,883        3.6      3,022        4.9      5,608        6.0        699        3.6
Other income (expense)..................        (74)      (0.1)      (506)      (0.8)    (1,279)      (1.3)      (262)      (1.3)
                                          ---------  ---------  ---------  ---------  ---------  ---------  ---------  ---------
Income from continuing operations before
  income tax............................      1,809        3.5      2,516        4.1      4,329        4.7        437        2.3
Provision for income tax................        599        1.2      1,051        1.7      1,574        1.7        159         .8
                                          ---------  ---------  ---------  ---------  ---------  ---------  ---------  ---------
Income from continuing operations.......  $   1,210        2.3% $   1,465        2.4% $   2,755        3.0% $     278        1.5%
                                          =========  =========  =========  =========  =========  =========  =========  =========
</TABLE>
                                                  1998
                                          --------------------
Revenues................................  $  25,915      100.0%
Direct costs............................     20,521       79.2
                                          ---------  ---------
Gross profit............................      5,394       20.8
General and administrative expenses.....      3,792       14.6
                                          ---------  ---------
Income from operations..................      1,602        6.2
Other income (expense)..................       (451)      (1.7)
                                          ---------  ---------
Income from continuing operations before
  income tax............................      1,151        4.5
Provision for income tax................        479        1.9
                                          ---------  ---------
Income from continuing operations.......  $     672        2.6%
                                          =========  =========

THREE MONTHS ENDED MARCH 31, 1998 COMPARED TO THREE MONTHS ENDED MARCH 31, 1997

     Revenues increased by $6.4 million, or 32.9%, to $25.9 million during the
first quarter of 1998 from $19.5 million during the three months ended March 31,
1997. This increase was mainly due to internal growth at most of the Company's
subsidiaries caused by strong customer demand for Petrocon's engineering and
design services. In addition, Alliance Engineering, Inc. ("AEI"), was acquired
during the first quarter of 1997 and contributed revenues of $2.1 million during
that period compared to $4.9 million during the first three months of the
current year.

     Gross profit improved by $1.4 million, or 34.3%, to $5.4 million during the
three months ended March 31, 1998 from $4.0 million during the same period in
the prior year. The gross margin increased to 20.8% for the first quarter of
1998 from 20.6% for the same period in 1997. The increase was primarily due to
increased revenues throughout the Company, and particularly at AEI, which
generally achieves higher gross margins than the other Petrocon subsidiaries.

     General and administrative expenses increased by $0.5 million to $3.8
million during the first quarter of 1998 from $3.3 million during the comparable
prior year period. This increase was principally related to the inclusion of
administrative costs for AEI for the full three-month period during 1998 versus
only two months during the 1997 quarter. Various other payroll-related and
administrative costs increased during the first three months of 1998 from the
comparable prior year period mainly due to the rise in revenues from 1997 to
1998.
   
     Other income (expense) for the first quarter of 1998 increased by $(0.2)
million to $(0.5) million from $(0.3) million for the comparable period in 1997.
This increase was primarily related to a $0.1 million
    
                                       26
<PAGE>
decrease in the earnings of PAL resulting from a reduction in project revenues
from the Middle East region, which earnings are reported under the equity
method.

     Net income increased by $0.4 million, or 142%, to $0.7 million for the
first three months ended March 31, 1998 from $0.3 million during the same period
in 1997.

YEAR ENDED DECEMBER 31, 1997 COMPARED TO YEAR ENDED DECEMBER 31, 1996

     Revenues for 1997 increased by $30.7 million, or 49.6% to $92.6 million
from $61.9 million for 1996. This increase was principally due to the
acquisitions of AEI, RPM/Barnard & Burke ("RPM") and Triangle Engineers &
Constructors, Inc. ("TE&C") in February 1997, October 1996 and July 1996,
respectively. These entities contributed revenues of $39.7 million in 1997 as
compared to $6.1 million in 1996. This increase was partially offset by a
reduction in revenues at Petrocon (excluding revenues attributable to the
acquisitions) primarily as a result of the transfer of an aggregate of
approximately $3.5 million of revenues to PAL and the acquired companies.

     Gross profit for 1997 increased by $8.3 million, or 65.9%, to $20.9 million
from $12.6 million for 1996. The gross margin increased to 22.6% in 1997 from
20.4% in 1996. This increase was principally due to the acquisitions of AEI and
RPM, which achieved generally higher gross margins than the other Petrocon
subsidiaries. AEI, RPM and TE&C contributed aggregate gross profit for 1997 of
$10.6 million as compared to $1.6 million for 1996.

     General and administrative expenses for 1997 increased by $5.7 million to
$15.3 million from $9.6 million for 1996, primarily as a result of the AEI, RPM,
and TE&C acquisitions, the addition during June 1996 of a corporate acquisition
staff and an increase in office work as contrasted with in-plant assignments.
AEI, RPM and TE&C accounted for $7.4 million of general and administrative
expenses for 1997 as compared to only $1.2 million in 1996. In addition, office
work generally carries higher general and administrative expenses but also
generates higher margins than in-plant assignments.

     Other income (expense) for 1997 increased by $(0.8) million to $(1.3)
million from $(0.5) million for 1996. This increase was primarily due to (i) a
$1.0 million increase in interest expense resulting from increased borrowings
needed to fund acquisitions, a shareholder preferred stock buy-back program and
working capital requirements and (ii) a $0.5 million charge related to the
write-off of certain leasehold improvements and other property. These expense
increases were partially offset by an $0.8 million increase in the earnings of
PAL reported under the equity method.

     Income from continuing operations for 1997 increased by $1.3 million, or
86.7%, to $2.8 million from $1.5 million for 1996.

YEAR ENDED DECEMBER 31, 1996 COMPARED TO YEAR ENDED DECEMBER 31, 1995

     Revenues for 1996 increased by $9.5 million, or 18.1%, to $61.9 million
from $52.4 million in 1995. This increase was primarily the result of the
acquisitions of RPM and TE&C, which contributed revenues of $6.1 million in
1996. In addition, internal growth accounted for an increase of $3.4 million
based in part on the receipt of significant incentive payments on several large
projects completed in 1996.

     Gross profit for 1996 increased by $2.4 million, or 23.5%, to $12.6 million
from $10.2 million for 1995, primarily due to the increase in revenues and from
the RPM and TE&C acquisitions. The gross margin increased to 20.4% in 1996 from
19.6% in 1995. This improvement was principally due to the RPM acquisition,
which achieved generally a higher gross margin than the other Petrocon
subsidiaries.

     General and administrative expenses for 1996 increased by $1.2 million to
$9.6 million from $8.4 million for 1995, primarily as a result of the RPM and
TE&C acquisitions and the addition of the corporate acquisition staff in June
1996. RPM and TE&C accounted for $1.2 million of general and administrative
expenses in 1996.
   
     Other income (expense) for 1996 increased by $(0.4) million to $(0.5)
million from $(0.1) million for 1995. This increase related principally to (i) a
$0.1 million increase in interest expense due to increased borrowings to fund
acquisitions and the shareholder preferred stock buy-back program and (ii) a
$0.4 million decrease in the earnings of PAL reported under the equity method.
The decrease in the earnings of PAL resulted primarily from the imposition of
quota requirements under certain client contracts that have since been resolved.
    
                                       27
<PAGE>
     Income from continuing operations for 1996 increased $0.3 million to $1.5
million from $1.2 million for 1995.

PETROCON -- LIQUIDITY AND CAPITAL RESOURCES

     Petrocon had cash and cash equivalents of $2.3 million and $0.7 million at
December 31, 1997 and March 31, 1998, respectively. In addition, Petrocon has a
$14.5 million revolving credit facility, of which $11.6 million and $12.3
million was outstanding at December 31, 1997 and March 31, 1998, respectively.
This credit facility is secured by the Company's accounts receivable and
requires Petrocon to maintain certain financial covenants regarding net worth
and cash flow, as well as certain financial ratios, including fixed charge
coverage and specified levels of certain other items. The credit facility
expires in August 1999. The Company intends to repay this credit facility with
proceeds from the Offering and enter into the New Credit Facility. See "Use of
Proceeds" and "-- Pro Forma Combined -- Liquidity and Capital Resources."

     For 1997, net cash provided by operations totaled $3.3 million as compared
to $4.6 million for 1996. Cash provided by operations for 1997 consisted of net
income of $2.8 million, plus non-cash revenue and expenses of $1.9 million, less
changes in working capital of $1.4 million in the aggregate. Non-cash revenue
and expenses for 1997 included depreciation and amortization expense of $1.8
million. Changes in working capital included a $3.3 million increase in accounts
receivable as a result of the higher revenues in 1997, and a $1.4 million
increase in costs and estimated earnings in excess of billings on uncompleted
contracts due to an increase in projects in progress but not completed at year
end. This use of working capital was partially offset by increases in accounts
payable of $0.8 million and accrued salaries and fringe benefits of $2.7
million, primarily due to the higher revenues in 1997 and the AEI acquisition.

     For the three months ended March 31, 1998, net cash used in operations
totaled $1.2 million compared to $0.8 million during the same period in 1997.
Current year cash used in operations consisted of net income of $0.7 million,
plus non-cash expenses of $0.3 million, less working capital changes of $2.2
million.

     Non-cash revenue and expenses during the January to March 1998 period
included depreciation and amortization expense of $0.4 million. Changes in
working capital included a $0.8 million increase in accounts receivable as a
result of higher revenues in 1998, and a $1.4 million increase in costs and
estimated earnings in excess of billings on uncompleted contracts due to an
increase in the amount of projects in progress but not completed at March 31. In
addition, working capital was used to reduce accrued compensation and benefits.
This use of working capital was partially offset by an increase in amounts
payable of $1.1 million, primarily due to higher revenues in 1998.

     Capital expenditures were $1.2 million and $0.4 million for the year ended
December 31, 1997 and for the three months ended March 31, 1998, respectively.
Such expenditures were principally for the purchase of computer equipment and
software and certain AEI leasehold improvements.

     In February 1997, a wholly-owned subsidiary of Petrocon merged with AEI.
Cash used for the acquisition, net of cash acquired, was $3.1 million in the
aggregate. In August 1997, Petrocon repurchased 154,531 shares of its
outstanding Series A preferred stock in exchange for cash of $0.9 million and
other consideration. At December 31, 1997, net increases in amounts outstanding
under PEI's credit facility and notes payable were $3.8 million in the
aggregate, principally to fund the AEI acquisition and for working capital
requirements.

     Petrocon capital expenditures for 1998 are expected to be approximately
$1.5 million, primarily for Petrocon computer equipment and software.

                                       28
<PAGE>
                               INDUSTRY OVERVIEW

GENERAL

     Engineering is an integral part of virtually every type of construction,
manufacturing, processing, natural resource extraction, power generation or
transportation activity. Firms providing engineering services range from small,
local firms employing several or even a single engineer, to global organizations
whose professionals number in the thousands and which have worldwide
capabilities. Some engineering firms confine their activities to "pure"
planning and design functions, while many combine their engineering work with
varying degrees of construction, architectural and other activities. Some
engineering firms are specialized, either on a discipline or industry basis, and
others are multidisciplined and serve a broader base of clients.

     Given the breadth of activities constituting "engineering" and the
diversity of the firms conducting these activities, generalizations and
characterizations are difficult and largely subjective. ENR annually reports on
and ranks by client billings what it calls "The Top 500 Design Firms," which
include U.S.-based engineer-constructor, engineer-architect and other hybrid
organizations, as well as exclusively design and planning firms. Ranked
companies classify themselves as concentrating in specified areas of work.
According to ENR'S report for 1997, its 500 top ranked firms as a group billed
their clients $32.7 billion in 1997, representing a 10.3% increase over 1996.
For 1997, the "Top 500's" total reported client billings by areas of work were
as follows:

                                          BILLINGS
                                        (IN BILLIONS     PERCENT
            TYPE OF WORK                 OF DOLLARS)     OF TOTAL
- -------------------------------------   -------------    --------
General Building.....................        5.0           16.8
Transportation.......................        4.6           15.4
Hazardous Waste......................        4.5           15.1
Petroleum............................        4.0           13.7
Industrial Process...................        3.0           10.1
Sewerage/Solid Waste.................        2.6            8.7
Power................................        1.7            5.6
Manufacturing........................        1.6            5.3
Water Supply.........................        1.5            4.9
Other................................        1.3            4.5

     Of the total 1997 billings reported by ENR'S "Top 500," $25.4 billion, or
77.7%, was represented by domestic billings, and $7.3 billion, or 22.3%, was
represented by international work. Out of the "Top 500" firms, 309 firms
reported increases in their professional staff during 1997, versus 179 firms
which reported losses or no change in professional staff, and 304 firms reported
higher backlogs at the end of the year, while 163 firms reported lower or
unchanged backlog levels.

INDUSTRY CONDITIONS

     The markets served by the ENR ranked firms and the many thousands of
unranked U.S. and foreign-based design and engineering firms make up a global
construction market estimated to exceed $3 trillion annually. In the United
States, over the last decade, the annual value of construction put in place has
been assessed by the U.S. Department of Commerce at over $400 billion in current
dollars. The market for engineering services has experienced significant growth
in recent years as reflected by an increase in annual billings by ENR'S "Top
500" of $3.3 billion, or 11.2%, from $29.4 billion in 1995 to $32.7 billion in
1997. The Company believes there will be a continued strong demand for
engineering services within the United States and internationally due to, among
other things, the following factors:

          ANTICIPATED SPENDING ON INFRASTRUCTURES.  The United States
     infrastructure needs have been much publicized. Upgrades and expansions of
     the existing infrastructure, including highways, water and sewer lines and
     gas and other power utilities are currently estimated by the Associated
     General Contractors of America to require more than $3 trillion over the
     next 20 years, averaging approximately $180 billion each year. Similarily,
     significant infrastructure expenditures are expected in

                                       29
<PAGE>
     Europe, with construction spending estimated at approximately $500 billion
     per year. In lesser developed countries, increasing urbanization and the
     growing demand for an improved standard of living are expected to generate
     substantial engineering and construction infrastructure projects.

          CONTINUED IMPROVEMENT OF INDUSTRIAL OPERATING AND PROCESSING
     EFFICIENCIES.  The industrial construction market both within the United
     States and abroad is expected to continue to be driven by competitive and
     technological forces. Global competition is believed by management to be
     motivating plant owners to increase their spending on solutions that
     further automate and streamline their businesses. As a result, the global
     demand for technically diverse engineering services is expected to continue
     to increase.

          CONTINUED INCREASES IN REGULATORY REQUIREMENTS IMPACTING U.S.
     INDUSTRY.  Regulations regarding the environmental and safety compliance of
     U.S. businesses continue to create significant construction and engineering
     opportunities. For example, the EPA currently estimates that U.S. pulp and
     paper manufacturers will be required to make more than $1.8 billion in
     total capital expenditures and $277 million annually to comply with surface
     water discharge limitations currently in effect. The EPA further estimates
     that approximately $140 billion must be spent over the next 20 years to
     conform U.S. wastewater and hazardous waste disposal sites to comply with
     current regulatory requirements.

          CONTINUED TRENDS IN OUTSOURCING OF PLANT OPERATION AND
     MAINTENANCE.  Technical staffing by engineering firms should continue to
     expand as refineries and manufacturing and processing plants rely
     increasingly on outside firms to provide engineering services related to
     plant operations and maintenance. Industrial clients have continued to
     reduce their in-house engineering staffs related to these areas as a result
     of outsourcing non-core business functions and industry downsizing.
     Industry studies estimate that between 20% and 50% of the total cost of
     running a plant is represented by maintenance and that the total potential
     plant maintenance market ranges from $300 billion to $500 billion annually.

TREND TOWARD CONSOLIDATION

     The Company believes that more than 28,000 U.S. firms, and an even greater
number of foreign firms, offer some form of engineering and design services. The
Company also believes that these firms are combining at the local, national and
international levels as they seek to expand their geographic coverage, broaden
their professional capabilities, expand within existing geographic markets and
specialties, and leverage their engineering capabilities through
cross-marketing. The Company believes that the same motivating factors that have
led some of Europe's largest firms to acquire or obtain controlling interests in
some of the largest and best known engineering firms in the United States, and
VICE VERSA, will continue to induce combinations among local, regional, national
and foreign firms of every size and type.

     The Company further believes that at the mid-size and regional firm level,
several other factors are contributing to an increasing number of firms seeking
to combine with other, larger organizations. Frequently, the founders and
principals of these firms are engineers or designers first, and professional
business managers second. Their firm's growth has imposed on them greater
management responsibilities at the expense of their professional practice, and
many are seeking either relief from or assistance with their management burdens.
Also, regardless of their legal form, many such firms, over the life of their
development, have assumed partnership-like characteristics as growing numbers of
professionals have become equity owners in the firm, a process which often
raises difficult governance and other issues that can be solved by a combination
with a larger, professionally managed firm. Furthermore, many of these firms
recognize their need for overhead reductions, but feel constrained in making
them by what often are non-economic factors. The Company believes that in many
instances, such firms may view their acquisition as an opportunity to achieve
appropriate and necessary overhead reductions without having to self-impose
them. Finally, the growth opportunities of these firms are often limited by
bonding and other performance guarantee requirements which are beyond their
financial capabilities, but which could be satisfied by access to greater
financial resources through association with a larger firm.

                                       30
<PAGE>
                                    BUSINESS

GENERAL
   
     The Company is a diversified engineering company providing engineering
services and engineered systems to a broad range of industrial, commercial and
institutional clients throughout the United States and internationally. The
Company's multidisciplined expertise enables it to offer its clients total
design and engineering solutions extending from project inception through
completion, start-up and operation, within multiple industries and across
diverse geographic markets. During 1997, the Company was involved in engineering
projects in 26 states and over 21 countries worldwide, generating pro forma
combined revenues of $169.1 million, of which $119.5 million, or 70.7%, was from
domestic projects, and $49.6 million, or 29.3%, was from international work.
    
     OEI was formed in October 1997 by Petrocon's management to conduct the
offering, simultaneously consummate the Pending Acquisitions and continue
Petrocon's successful acquisition program. The Company, through Petrocon, has
grown significantly through acquisitions, having acquired more than 13
engineering firms since 1988. As a result of the Pending Acquisitions and the
Offering, the Company believes it will have greater financial, technical and
professional resources, which will enable it to aggressively continue its
successful acquisition strategy, enhance its technical capabilities and expand
its already diversified client base.

     The Company operates in two principal segments: engineering services and
engineered systems. The Company's engineering services encompass all aspects of
the process, civil, structural, mechanical, instrument, electrical, geotechnical
and environmental engineering and design disciplines, providing its clients with
a single source for all their design, engineering and permitting needs. The
Company has designed and engineered facilities ranging from refineries,
petrochemical plants, pulp and paper processing plants and wastewater treatment
facilities, to food and beverage processing plants, pharmaceutical plants and
laboratories, electronics manufacturing facilities, hotels and casinos. The
Company's engineered systems are primarily custom designed, built, programmed
and installed on a fixed-price, turnkey basis and include control and
instrumentation systems and modular processing plants primarily for the oil and
gas, refining and chemical processing industries. During 1997, approximately
$123.5 million, or 73.0%, of the Company's pro forma combined revenues were
attributable to engineering services and $45.6 million, or 27.0%, were
attributable to engineered systems. The Company provides engineering services
and engineered systems to a number of Fortune 100 companies through a staff of
over 1,600 employees, including approximately 1,100 engineers and design
professionals as of March 31, 1998.

BUSINESS STRATEGY

     The Company has developed a strategic plan to:

     EXPAND AND DIVERSIFY THROUGH ACQUISITIONS.  The Company intends to
aggressively continue its acquisition program targeted at well-established,
profitable engineering companies offering engineering services and engineered
systems similar or complementary to those offered by the Company. See
"-- Acquisition Strategy" and "-- Acquisition History." The key elements of
the Company's acquisition strategy are to:

          ENTER NEW GEOGRAPHIC MARKETS.  The Company intends to expand its
     geographic coverage by acquiring well-established and highly respected
     local and regional firms within the U.S., as well as foreign firms, with
     operations in geographic areas not currently served by the Company.

          EXPAND AREAS OF TECHNICAL EXPERTISE.  The Company intends to expand
     the scope of its technical expertise by acquiring firms with acknowledged
     expertise and experience in specialized service areas that are not offered
     by the Company or in which the Company does not enjoy a widely recognized
     reputation. This would provide the Company's existing and future clients
     with a broader range of services.

                                       31
<PAGE>
          STRENGTHEN PRESENCE WITHIN EXISTING GEOGRAPHIC MARKETS AND
     SPECIALTIES.  The Company intends to acquire firms in markets currently
     served and specialties currently offered by the Company in order to
     increase the professional resources available to the Company and secure
     larger projects.

          ENHANCE CROSS-MARKETING OPPORTUNITIES  The Company also intends to
     enhance its cross-marketing opportunities by acquiring other engineering
     firms whose services and systems can be packaged or cross-marketed with the
     Company's existing services and systems.

     ACCELERATE INTERNAL GROWTH.  The principal elements of the Company's
internal growth strategy are to (i) attract larger, higher-margin projects by
virtue of increased financial, professional and technical resources, (ii)
leverage the Company's capabilities and expertise through cross-marketing and
(iii) develop new partnering relationships and other strategic alliances.

     IMPROVE OPERATING MARGINS.  The Company believes that combining Petrocon
and the Acquired Companies will provide significant opportunities to increase
the Company's profitability. The key components of this strategy are to:

          INCREASE OPERATING EFFICIENCIES.  The Company believes that it will be
     able to increase its overall staff utilization rate by more effectively
     deploying and allocating its professional resources. The Company intends to
     accomplish this goal with the aid of computer networking, which will allow
     work to be sent instantly by computer to the location of available
     resources, and by extending the concepts of the Company's "Vision 2000,"
     a project-driven approach which the Company has had in place for almost
     four years and which has helped Petrocon lower significantly its
     non-billable hours and maximize its rate of chargeability. The Company also
     expects improvements in its overall staff utilization rate as a result of:
     (i) increased utilization of highly specialized personnel based upon a
     larger number of Company-wide engineering projects; (ii) increased
     flexibility to make staff adjustments at those operating companies located
     in geographic areas with more limited talent pools; and (iii) the
     Company-wide application of Petrocon's operating experience in the Texas
     Gulf Coast area, which is one of the country's most competitive
     environments for engineering services.

          CENTRALIZE APPROPRIATE ADMINISTRATIVE FUNCTIONS.  The Company believes
     that opportunities exist to improve operating margins by consolidating the
     administrative functions of the Company, such as finance, insurance,
     employee benefits and accounting.

          EXPLOIT PURCHASING POWER.  The Company expects to use its increased
     purchasing power to gain volume discounts both for itself and in connection
     with its procurement services for its clients. These discounts will enable
     the Company to secure larger margins on its turnkey projects and
     fixed-price contracts, and to potentially secure additional contracts in
     situations where these discounts can be passed through to its clients.

     OUTSOURCE CONSTRUCTION ACTIVITIES.  While the Company recognizes the
current trend among project owners and operators toward turnkey projects, under
which a single firm provides all engineering, procurement and construction
services associated with a project, the Company believes it can offer clients
these projects, without assuming all of their associated construction risks, by
forming joint ventures and other partnering relationships with specialized
construction firms. Similarly, in instances where the Company is asked or
required to take an equity interest in a project, the Company intends to seek
financial partners with capital available for that purpose, rather than
deploying its own capital in meeting any project equity requirements. The
Company believes that combining Petrocon and the Acquired Companies will result
in a larger firm, both financially and in terms of professional resources, and
thus a more attractive partnering candidate for potential construction and
financial partners.

     OPERATE ON A DECENTRALIZED BASIS.  The Company intends to manage its
operating companies and subsequently acquired companies on a decentralized
basis, with local management retaining responsibility for day-to-day operations,
profitability and growth. The Company's executive management intends to closely
monitor operating results of its operating companies and will provide direction
and guidance on operational matters, such as staff utilization rates, backlog
control and marketing and cross-selling opportunities, in an effort to improve
profitability at each operating level. The Company believes that

                                       32
<PAGE>
combining a decentralized management structure with strong, centralized
operating and financial controls geared to accountability will support the
entrepreneurial and creative culture at each of its operating companies, while
allowing the Company to capitalize on the local and regional market knowledge,
goodwill, name recognition and client relationships of each of the operating
companies.

ACQUISITION STRATEGY

     The Company intends to aggressively continue its acquisition program
targeting well-established and profitable companies offering engineering
services and engineered systems similar or complementary to those offered by the
Company. Acquisitions will be expected to expand the Company's geographic
coverage, broaden its technical capabilities or expertise, improve its market
share within existing geographic markets or specialties, or provide increased
cross-selling opportunities. Certain acquisitions will be large enough to
maintain their own operating and management structure, while other smaller
acquisitions will be folded into an existing operation without significantly
increasing the Company's infrastructure. From among the many thousands of
engineering companies estimated to be active in the United States, and the many
more thousands of foreign firms, the Company believes there will be no shortage
of acquisition candidates. The Company will selectively pursue acquisition
candidates based on the Company's acquisition criteria, such as profitability,
revenue growth potential, similar or complementary services, systems and client
bases that provide potential cross-selling opportunities, established
reputation, qualified and experienced management, professional and technical
personnel and geographic and cultural compatibility.

     The Company believes it will be regarded by acquisition candidates as an
attractive acquirer because of: (i) the Company's strategy for creating a
professionally managed engineering firm of internationally recognized stature;
(ii) the Company's decentralized operating strategy which emphasizes an ongoing
role for owners, management and key personnel of acquired firms, as well as
meaningful equity positions for these individuals which will enable them to
participate in the Company's growth and realize improved liquidity; (iii) the
Company's objective of maintaining a professional environment which will attempt
to preserve and capitalize on the entrepreneurial spirit, creativity and
ingenuity of the acquired firms' owners and professional personnel; (iv) the
potential for growth of both the acquired entity and the Company overall by
virtue of increasing the scope and variety of services which the acquired firm
and the Company can together make available to their existing client bases, as
well as increasing the size and variety of the projects which can be undertaken
by the acquired firm as a result of its access to greater financial, technical
and professional resources; and (v) the potential for increased profitability of
the acquired company due to centralization of administrative functions, enhanced
information and design systems capabilities and purchasing economies.

     The Company intends to use various combinations of its Common Stock, cash
and notes as consideration for future acquisitions. The consideration for each
future acquisition will vary on a case-by-case basis. The Company will finance
future acquisitions through funds provided by operations, by the New Credit
Facility and from the proceeds of future equity and debt financings. During
1998, the Company intends to register 3,000,000 shares of Common Stock under the
Securities Act for use in connection with future acquisitions.

                                       33
<PAGE>
ACQUISITION HISTORY

     Since 1988, the Company has experienced substantial growth through
acquisitions. Key members of the Company's management team have worked together
for several years at Petrocon, which has made over 13 acquisitions to date. In
the process, the Company's management has gained valuable experience in
sourcing, negotiating, closing and successfully integrating acquisitions. The
following table describes eight of the more strategically significant
acquisitions by the Company since 1988:
<TABLE>
<CAPTION>
                                             PRE-ACQUISITION
                                   YEAR        REVENUES(1)
       COMPANY ACQUIRED          ACQUIRED     (IN MILLIONS)           DESCRIPTION
- ------------------------------   --------    --------------- ------------------------------
<S>                              <C>           <C>           <C>                         
Engineering Division of Austin      1988          $ 6.5      Multidisciplined engineering
  Industries, Inc.                                           services to the process
                                                             industries in the Texas and
                                                             Louisiana Gulf Coast Area
DLH Associates                      1991          $ 1.2      Intrumentation and
                                                             programmable logic control
                                                             systems
Coastal Technical Corporation       1991          $ 8.0      Technical personnel
                                                             outsourcing
HTC, Inc.                           1992          $ 0.6      Instrumentation and
                                                             programmable logic control
                                                             systems
Eagleton Saudi Arabia Limited       1992          $12.0(3)   Engineering services to the
  (PAL)(2)                                                   petroleum industry in the
                                                             Middle East
Triangle Engineers &                1996          $ 7.0      Multidisciplined engineering
  Constructors, Inc.                                         services to the petroleum and
                                                             chemical industries in the
                                                             Gulf Coast area
RPM/Barnard & Burke                 1996          $17.5      Services to the downstream oil
                                                             and gas industry in the
                                                             Mississippi River corridor of
                                                             Louisiana
Alliance Engineering, Inc.          1997          $14.0      Process design serving the
                                                             upstream segment of the oil
                                                             and gas industry, with subsea
                                                             structural design specialty
</TABLE>
- ------------

(1) Represents unaudited revenues for the fiscal year ending in the year
    immediately preceding the year of the acquisition.

(2) Acquisition of a 50% interest in what is now PAL.

(3) Represents 100% of PAL's revenues. No PAL revenues are included in the
    Company's revenues because it uses the equity method to account for PAL.

     Through these acquisitions, the Company has demonstrated the ability to
implement its acquisition strategy. The Company expanded internationally through
its acquisition of a 50% interest in PAL (formerly Eagleton Saudi Arabia
Limited), which has provided the Company with a presence in the Middle East and
surrounding countries. PAL has also provided cross-selling opportunities by
assisting the Company in securing engineering projects for its U.S-based
operating companies. The Company broadened its technical expertise in control
systems through a series of acquisitions, including DLH Associates and HTC,
Inc., which enabled the Company to immediately compete for a growing number of
control system project opportunities. The Company acquired Coastal Technical
Corporation to take advantage of an industry trend of outsourcing certain
in-plant engineering functions and as a hedge against cyclical downturns. The
acquisitions of RPM/Barnard & Burke, Triangle Engineers & Constructors, Inc. and
Alliance Engineering, Inc. have strengthened the Company's position in the Gulf
Coast region, while at the same time expanding the Company's engineering
capabilities in the upstream oil and gas market. These acquisitions also
permitted the Company to gain additional plant engineering projects with certain
of its long-term alliance clients by adding new office locations in close
proximity to their plants.

                                       34
<PAGE>
ENGINEERING ACTIVITIES

     The Company groups its engineering activities into two principal segments:
engineering services and engineered systems. The following table sets forth, for
the periods indicated, the contribution to the Company's combined revenues from
each of these segments:

                                           YEAR ENDED DECEMBER 31,
                                       -------------------------------
                                         1995       1996       1997
                                       ---------  ---------  ---------
                                                (IN MILLIONS)
Engineering Services.................  $    80.8  $    94.7  $   123.5
Engineered Systems...................       19.6       39.7       45.6
                                       ---------  ---------  ---------
     Total...........................  $   100.4  $   134.4  $   169.1
                                       =========  =========  =========

     ENGINEERING SERVICES.  The Company's engineering service capabilities
encompass all aspects of the process, civil, structural, mechanical, instrument,
electrical, geotechnical and environmental engineering disciplines, providing
its clients with a single source for all their design, engineering and
permitting needs. This multidisciplined expertise enables the Company to offer
total design and engineering solutions extending from product inception through
completion, start-up and operation, within multiple industries and across
diverse geographic markets.

     The Company's services include feasibility studies, conceptual design,
detail engineering, site and environmental planning, evaluation and permitting,
procurement, project and construction management, inspection and verification,
maintenance, plant operations, quality assurance/control and information
technology. The Company has designed and engineered facilities ranging from
refineries, petrochemical plants, pulp and paper processing plants and
wastewater treatment facilities, to food and beverage processing plants,
pharmaceutical plants and laboratories, electronics manufacturing facilities,
hotels and casinos.

     The nature and variety of the Company's engineering services are
illustrated by the following representative listing of projects completed by the
Company:

      o   Total design, integration and project management for a substantial
          refinery upgrade project for Lyondell-Citgo in the Houston, Texas
          area.

      o   Total design, procurement, installation supervision and startup of a
          fruit processing plant in southern India.

      o   Engineering, procurement and construction management services for a
          significant distributed control system upgrade for a major refinery in
          the Middle East.

      o   Engineering, design, procurement, construction support and startup
          services for a process system to blend coffee for Pepsi-Cola
          International.

      o   Full range of environmental planning, permitting and engineering
          consulting services relating to a 25,000 seat waterfront amphitheater
          located in New Jersey.

      o   Design and permitting services related to a gas/odor collection system
          project for a major New York landfill.

      o   Total engineering and design services for a marine research
          laboratory, which includes a state-of-the-art 32,000 gallon aquarium
          with seawater filtration and water temperature and lighting controls
          for simulation of various aquatic conditions.

      o   Process engineering services for a substantial chemical plant project
          in mainland China for a major U.S. chemical company.

     The Company also provides engineers, designers and draftsmen to its clients
for assignment inside the clients' facilities. These staffing arrangements,
primarily with refineries and petrochemical and processing plants in the Texas
and Louisiana Gulf Coast region, include: partnering relationships with clients;
in-plant task forces operating under the Company's supervision; and
employee-lending arrangements where Company employees work under the client's
supervision. At March 31, 1998, approximately 509 Company

                                       35
<PAGE>
personnel were contracted for some form of in-plant assignment. The Company
intends to continue pursuing a strategy of placing employees on in-plant
assignments in order to take advantage of what it believes to be a sustained
trend toward outsourcing and single sourcing among plant owners and operators,
and as a hedge against cyclical slumps resulting from general economic or
industry specific conditions.

     ENGINEERED SYSTEMS.  The Company provides two primary types of engineered
systems: control and instrumentation systems and modular processing plants.

     CONTROL AND INSTRUMENTATION SYSTEMS.  The Company designs, engineers,
assembles, programs, installs, integrates and services control and
instrumentation systems for specific applications, principally in various energy
and processing related industries. The Company's control and instrumentation
systems are custom designed and include both conventional pneumatic and
hydraulic control systems and sophisticated electronic, microprocessor-based
controls employing programmable logic. Typical applications for the Company's
control and instrumentation systems include oil and gas production safety
systems, fire and gas detection systems, pipeline compressor station and data
acquisition systems, surface controls for subsea production systems and control
systems for oil and gas wells, engine and gas turbine driven compressors, pumps,
boilers and heaters, and processing equipment. The Company offers turnkey
electrical and instrumentation field construction services for equipment
packages, offshore oil and gas production facilities, pipeline compressor
stations, refineries and processing plants. All facets of control and
instrumentation system design, engineering, assembly and testing are performed
in-house by the Company, and the Company's full service field installation and
technical staff performs complete electrical and instrumentation installation
projects, start-up and commissioning services, modifications to existing
systems, on-site training and routine maintenance procedures for client
operating personnel. The Company's control systems unit does not produce
products for inventory and purchases component parts for its systems only on an
as-needed basis.

     MODULAR PROCESSING PLANTS.  The Company designs, engineers, fabricates and
installs modular processing plants for the oil and gas and petrochemical
industries. The Company specializes in cryogenic turbo-expander units which
employ extreme low temperatures in the processing of natural gas for the
extraction of ethane and heavier gas liquids and the removal of nitrogen and
other inerts. The Company also designs and builds extraction plants using
conventional refrigeration to remove propane and heavier gas liquids from
natural gas. Other modular plants designed and built by the Company include
plants for gas treatment, sulfur, dehydration and fractionation, crude
stabilization and production, MTBE, waste heat recovery and cogeneration, and
amine treatment. The Company has designed and built plants ranging in capacity
up to 450 million standard cubic feet per day for extraction plants, 250 million
standard cubic feet per day for gas treatment plants, 600 tons per day for
sulfur plants, 60,000 barrels per day for fractionation plants and 1.2 billion
cubic feet per day for gas dehydration plants.

     All mechanical, structural, civil, piping, electrical and instrumentation
engineering incorporated in the Company's modular plants is performed by the
Company. The Company's modular plants are constructed at its fabrication
facility in Houston, Texas. The plants are built on skids and transported to
their site either by the Company or its client depending on the client's
preference. If requested by the client, the Company provides full on-site
installation, testing and commissioning services for its modular plants.

     The Company believes that its modular plants offer advantages over
comparable plants constructed on site, including quicker and more predictable
delivery schedules, higher quality assurance due to the controlled environment
in which the plants are built, and lower costs attributable to simplified
materials delivery, quantifiable labor costs and simplified field installation.

     Historically, the Company has undertaken only a small number of high-margin
modular plant projects annually, and most of its plants were for installation in
the oil and gas producing regions of the United States, principally in Texas,
Louisiana, Oklahoma and New Mexico. In recent years, the Company has been
concentrating on building plants for foreign clients, for installation abroad,
since the Company believes foreign projects generally offer greater profit
opportunities. In 1997, the Company's two largest foreign projects were built
for installation in Argentina and the Ivory Coast, respectively.

                                       36
<PAGE>
BUSINESS DEVELOPMENT AND MARKETING

     The Company believes marketing and business development are Company-wide
responsibilities, and all of the Company's project and other managers are
formally encouraged to be actively involved in business development efforts
through the maintenance of professional and personal relationships and through
the identification and pursuit of new business opportunities. Company managers
closely monitor the Company's client list to insure that all existing clients
are contacted on a regular basis so that the Company remains before the client
and aware of all current and proposed client projects.

     At March 31, 1998, the Company had 20 full-time business development
managers who are responsible for both maintaining existing client relationships
and identifying new clients, projects and markets. The Company business
development managers are located in Houston (six) and Beaumont (four), Texas;
Baton Rouge (four) and Lake Charles (one), Louisiana; Louisville, Kentucky
(three); and Warren, New Jersey (two). Two of these business development
managers are responsible primarily for international business development. In
addition, the Company retains business development agents in Mexico City, three
Saudi Arabia locations and Lagos, Nigeria.

     In addition to the regional business development managers, the Company has
recently created the position of Executive Vice President of Marketing and
Development to implement, control, monitor, report and evaluate marketing
policies and procedures to be adopted on a corporate level and approved by the
President. These policies and procedures will be set after consultation with
management of the Company's primary operating locations and will be modified
from time to time as market and Company conditions warrant. Other
responsibilities of the Executive Vice President of Marketing and Development
will include developing, implementing, monitoring and evaluating policies and
procedures relating to cost-effective integration techniques at the operating
company level with emphasis on resource allocation, such as staff utilization,
work-load variances and man-hour cost-to-billing differentials, in an effort to
achieve periodic and long-term consolidated financial planning objectives, while
at the same time maintaining acceptable internal growth rates at the operating
companies.

OPERATIONS

     The Company intends to operate on a decentralized basis, with the
management of each operating company responsible for day-to-day operations,
profitability and growth. However, the Company intends to centralize certain
administrative activities from its executive offices. Centralized activities
will include accounting for the consolidated group, financing, business
development support, management information systems support, contract
administration, insurance and safety administration and audits. In addition, all
operating locations will be required to adhere to Company-wide policies and
procedures relating to financial reporting, internal controls, purchasing and
human resources and administration.

     The Company will also initiate "best practices" among all the operating
companies for project monitoring and cost controls, backlog reporting, risk
management and, where determined by the Company to be advisable, engineering
policies and procedures. The Company intends to establish a President's Council,
comprised of the president of OEI and the presidents of each of the Company's
significant operating companies, to meet periodically for the purpose of
implementing "best practices" and identifying areas where opportunities for
synergies may be realized.

     The Company intends to integrate in the near term the existing computer
system of Petrocon with each of the primary facilities of the Company's
significant operations. This system should increase the Company's overall staff
utilization rate by allowing the Company to instantly transmit work to the
location of available resources. The Company has recently retained an
integration coordinator to implement the integration of this system and other
centralized administrative functions.

COMPETITION

     In its engineering services segment, the Company competes nationally and
internationally with a large number of other firms of all sizes, ranging from
the industry's largest firms which operate on a worldwide basis to much smaller
regional and local firms. Among the firms larger than the Company, many offer a

                                       37
<PAGE>
broader range of services than does the Company, many concentrate their services
in one or more of the Company's service areas, and many have greater financial
and professional resources than the Company. The Company does not believe that
any one firm dominates or contributes a significantly large percentage of the
total volume of work performed in any particular service area.

     Competition in the Company's engineering services segment is primarily
centered on performance and the ability to provide the engineering, planning and
project execution skills required to complete projects in a timely and cost
efficient manner, as well as price. The high level of competition in this area
of the Company's business has fostered a trend away from the relatively riskless
cost-plus fee arrangements to pricing alternatives designed to shift to the
service provider, or requiring the service provider to at least share in, the
risks of cost overruns and inefficiencies in the delivery of services. These
alternatives include fixed-price, guaranteed maximum price, incentive fee,
competitive bidding, and other "value based" pricing arrangements. See "Risk
Factors -- Pricing and Related Risk Sharing" and "-- Contracts."

     In its engineered systems segment, the Company emphasizes, and believes it
is known for, the engineering quality and performance characteristics of its
systems, its total turnkey capabilities, its innovative design solutions and its
ability to meet promised delivery dates. The emphasis both clients and the
Company place on pricing tends to vary with cyclical conditions in the oil and
gas, petroleum and processing industries, with pricing becoming a more important
factor during industry downturns. The Company's control systems and modular
processing plants compete with similar systems built by other companies both
larger and smaller than the Company, some of which compete primarily on the
basis of pricing.

FOREIGN OPERATIONS

     The Company has performed engineering and construction management services
in over 25 countries, both directly and through its 50% interest in PAL, which
is headquartered in Al Khobar, Saudi Arabia and serves the entire Arabian Gulf
Region. In addition to its Al Khobar headquarters, PAL has branch offices in
Riyadh, Yanbu and Abu Dhabi, from which it services clients in Bahrain, Kuwait,
Oman, Qatar, Saudi Arabia and the United Arab Emirates. Through agents and
partners, the Company maintains offices in Mexico City, Mexico and Lagos,
Nigeria.
   
     For the years ended December 31, 1995, 1996 and 1997, combined revenues
from Company projects outside of the United States, excluding all PAL projects,
were approximately 18.5%, 28.6% and 29.3% of total revenues, respectively. The
Company accounts for its 50% interest in PAL by the equity method, and therefore
no PAL revenues are included in the Company's revenues. For the years ended
December 31, 1995, 1996 and 1997, PAL had revenues of approximately $9.2
million, $8.1 million and $16.4 million, respectively.
    
CONTRACTS

     The price provisions of the Company's contracts with its clients vary
greatly. However, these provisions can generally be grouped into one of three
categories: cost-plus; guaranteed maximum price; and fixed-price.

     COST-PLUS contracts provide for reimbursement of costs incurred by the
Company plus a predetermined fee or a fee based on a percentage of costs
incurred. This pricing arrangement presents the least risk to the Company.

     GUARANTEED MAXIMUM PRICE contracts are performed in the same manner as cost
plus contracts, except the total actual cost plus the fee cannot exceed the
guaranteed price negotiated between the Company and its client. If it does, then
the Company may bear all or a portion of the excess. Where the cost and fee are
less than the guaranteed price, the Company may share the savings with the
client on a predetermined basis.

     FIXED-PRICE contracts include both negotiated fixed-price contracts and
lump sum bid contracts that require the Company to perform work for a stated
amount. Under a negotiated fixed-price contract, the Company is first selected
as the contractor, and then the contract price is negotiated. Negotiated
fixed-price contracts are frequently agreed to in turnkey arrangements where the
Company has the opportunity to

                                       38
<PAGE>
perform feasibility studies and design work before negotiating the price. Under
lump sum bid contracts, the Company must bid against other firms based upon
specifications furnished by the client. Contract bidding carries certain
inherent risks, including the possibility of ambiguities in specifications,
problems with new technologies, strike delays, work stoppages and other
unforseen developments and changes that may occur over the contract period, that
are reallocated through the negotiation process. Although both forms of contract
involve a firm price for the customer, the lump sum bid contract presents the
greater degree of risk to the Company.

     The Company's control systems and modular processing plants are contracted
primarily on a lump sum, turnkey basis either FOB the Company or installed on
site. For modular processing plants, the client typically makes an initial
payment upon commencement of the project and progress payments at various stages
of the project. Retainages beyond the completion date, designed to insure plant
performance and compliance with specifications, are common.

     Most of the Company's contracts related to its engineering services
activities have historically been undertaken on a cost-plus basis. However, the
trend in the industry is away from this form of relatively riskless pricing,
with project owners increasingly requiring pricing alternatives that shift to
the service provider certain or all of the risk associated with cost overruns
and other service delivery inefficiencies. These alternatives include guaranteed
maximum price, fixed-price, incentive fee and other forms of "value-based"
pricing arrangements. The Company expects this trend to continue in the future,
with the result that the Company will be required to maintain and continually
improve, relative to its competitors, both the precision of its cost estimates
and the efficiency with which it delivers services. If managed properly, these
forms of pricing arrangements provide the Company with the potential for higher
margins. However, if the Company's discipline in either its cost estimates or
service efficiency declines or fails to keep pace with that of its competitors
the volume of awarded projects and their margins may be affected adversely. See
"-- Competition."

     The following table reflects the amount and approximate percentage of the
Company's combined revenues for each of the last three years, derived from each
of the Company's three basic types of contract pricing provisions:
<TABLE>
<CAPTION>
                                                           YEAR ENDED DECEMBER 31,
                                       ----------------------------------------------------------------
                                               1995                  1996                  1997
                                       --------------------  --------------------  --------------------
                                                                (IN MILLIONS)
<S>                                    <C>        <C>        <C>        <C>        <C>        <C>  
Cost-plus............................  $    74.8       74.5% $    84.9       63.2% $   109.6       64.8%
Guaranteed maximum price.............        6.1        6.1        5.9        4.4        6.7        4.0
Fixed-price..........................       19.5       19.4       43.6       32.4       52.8       31.2
                                       ---------  ---------  ---------  ---------  ---------  ---------
     Total...........................  $   100.4      100.0% $   134.4      100.0% $   169.1      100.0%
                                       =========  =========  =========  =========  =========  =========
</TABLE>
     In cases relating to the Company's engineering service projects where the
Company is responsible for equipment or materials procurement and places a
markup on the procurement costs, the Company records on its accounts the
revenues and expenses associated with the procurement services. On other
projects involving procurement services where the Company charges no mark-up on
the equipment or materials provided to its client, the revenues and expenses
associated with the Company's procurement services are not recorded on its
accounts.

     In accordance with industry practice, most of the Company's contracts are
subject to termination at the discretion of the client. Most contracts provide
for reimbursement of costs incurred and payment of fees earned by the Company
through the date of termination. Many of the Company's contracts also provide
indemnification to the client for losses and expenses incurred by the client as
a result of the Company's negligence and, in certain instances, the concurrent
negligence of the client. While the Company historically has not incurred
material losses with respect to these claims and maintains insurance in amounts
it considers adequate, no assurance can be given that the Company will not have
significant indemnification claims in the future, that claims made will not be
outside or exceed the Company's insurance coverage or that the

                                       39
<PAGE>
Company will be able to continue to obtain insurance coverage at rates it
considers reasonable. See "-- Risk Management; Litigation."
   
     Under certain contracts, the Company guarantees project completion by a
scheduled date or by achievement of certain acceptance and perfomance testing or
milestone levels. At December 31, 1997, the Company had underway projects
aggregating approximately $47.2 million in contract amount, which are subject to
some form of completion or performance guarantee. If the Company fails to meet
any required completion or performance requirements and is unable to remedy the
failure within the applicable cure period, the Company could incur financial
penalties in the form of liquidated damages or could be required to design or
repeat the service or repair or replace the system. See "Risk
Factors -- Completion Guarantees."
    
CLIENTS

     During 1997, the Company provided engineering, design, construction
management and procurement services to more than 702 industrial, commercial and
institutional clients, involving more than 1,780 projects in the private sector
and 90 projects in the public sector. The following table reflects the
approximate percentage of combined revenues derived from the Company's major
client groups for each of the last three years:

                                           YEAR ENDED DECEMBER 31,
                                       -------------------------------
                                         1995       1996       1997
                                       ---------  ---------  ---------
                                                (IN MILLIONS)
General Building.....................  $     4.7  $     5.2  $     6.5
Transportation.......................        1.9        1.7        0.2
Hazardous waste......................        3.2        1.2        0.7
Industrial/Petroleum.................       75.5      112.8      141.2
Sewerage/solid waste.................        4.9        4.1        4.5
Power................................        3.3        3.1        1.7
Manufacturing........................        5.9        5.3        5.6
Water supply.........................        0.4        1.0        1.4
Other(1).............................        0.6        0.0        7.3
                                       ---------  ---------  ---------
     Total...........................  $   100.4  $   134.4  $   169.1
                                       =========  =========  =========

- ------------

(1) Includes environmental and geotechnical reports and retail and residential
    site surveys.

     The Company's engineering services group has many clients representing a
broad range of industries and institutions, most of whom are repeat clients, and
historically has not had a continuing dependence on any single client or any
limited group of clients. However, one or a few clients have in the past and may
in the future contribute a substantial portion of the Company's revenues in any
one year or over a period of several consecutive years due to the size of major
engineering projects. The Company's business is not necessarily dependent upon
sustaining the level of revenues contributed by particular clients in any given
year or period of consecutive years. Historically, the Company has not generated
significant revenues from governmental clients, which accounted for only
approximately $4.4 million, $4.4 million and $3.6 million of the Company's
combined revenues during 1995, 1996 and 1997, respectively. In the Company's
experience, once it begins work on a particular project, it is unlikely the
client will terminate the Company's involvement before completion of the
project, unless the project itself is cancelled or postponed. Historically, the
Company has undertaken new projects for prior clients and has provided ongoing
services to clients following completion of their projects. Nonetheless, the
Company must continually obtain new engineering projects, whether from existing
or new clients, in order to generate revenues in future years as existing
projects are completed.

     In recent years, the continuing trend among the Company's engineering
services clients and their industry counterparts toward outsourcing,
single-sourcing and downsizing has fostered the development of arrangements with
clients which are less oriented toward specified projects and more focused on
ongoing,

                                       40
<PAGE>
longer-term relationships. These arrangements, often referred to as partnering
relationships or alliances, and, in some cases, sole source contracts, vary in
their scope, duration and degree of commitment. Some provide the Company with a
minimum number of work man-hours over specified periods; some assure the Company
of at least a designated percentage of the client's requirements for engineering
services at one or more locations; and some establish the Company as the
client's sole source of engineering services at a specific location or
locations. Other agreements express only a client's non-binding preference or
intent with respect to the Company and its services, or establish a general
contractual framework for what the parties expect will be an ongoing
relationship. Despite their variety, the collective effect of these partnering
relationships or alliances is to exert a stabilizing influence on the Company's
engineering services revenues. At present, the Company has some form of
partnering or alliance arrangement with several major refineries and chemical
companies. At March 31, 1998, approximately an aggregate $51.0 million of future
work under the Company's partnering or alliance contracts was considered to be
sufficiently firm for inclusion in the Company's backlog at that date. See
"-- Backlog".

     The Company's engineered systems clients include both end users, such as
drilling companies, oil and gas producers, pipelines, compressor stations,
chemical companies and processing plants, that own or operate the facilities for
which the systems are designed, and equipment manufacturers, construction
contractors and other engineering firms that incorporate the Company's control
systems into facilities and products of their own design, construction and
manufacture. In the past, the Company has undertaken only a small number of
modular processing plant projects each year, seeking out and choosing only those
which offer the greatest profit margin opportunities. As in the Company's
engineering services segment, in any given year, a small number of clients may
account for a large percentage of the engineered systems revenues for that year,
depending on the number of major projects undertaken by the Company. Though the
engineered systems segment frequently receives work from repeat clients, its
client list may vary greatly from year to year.

     No single client accounted for 10% or more of the Company's 1997 pro forma
combined revenues.

BACKLOG

     The following table sets forth the Company's combined backlog at December
31, 1996 and 1997 and March 31, 1998, for each of its two major segments and by
geographic regions:

                                           DECEMBER 31,
                                       --------------------     MARCH 31,
                                         1996       1997          1998
                                       ---------  ---------     ---------
                                                 (IN MILLIONS)
Engineering Services.................  $    42.7  $    86.2      $  74.6
Engineered Systems...................       20.6       15.5         11.6
                                       ---------  ---------     ---------
     Total...........................  $    63.3  $   101.7      $  86.2
                                       =========  =========     =========
Domestic.............................  $    44.0  $    79.5      $  73.3
International........................       19.3       22.2         12.9
                                       ---------  ---------     ---------
     Total...........................  $    63.3  $   101.7      $  86.2
                                       =========  =========     =========

     The Company's combined backlog at March 31, 1998, most of which is expected
to be completed within the next 12 months, includes only contracts for which the
Company has received authorization to proceed with the work. Although this
backlog represents only work which is under contract, it is not necessarily
indicative of the Company's future revenues or earnings related to the
performance of the work included in backlog. The Company's contracts are subject
to standard industry cancellation provisions, including cancellation on short
notice or upon completion of designated stages. Authorizations to proceed are
for periods generally shorter than the duration of the work the Company expects
to perform for a particular client, and significant scope-of-work adjustments
are common. For certain risks associated with the Company's backlog, see "Risk
Factors -- Nature of Backlog."

                                       41
<PAGE>
FACILITIES

     For its professional, technical and administrative staff, the Company
leases 16 offices in the U.S. and foreign locations totaling approximately
358,000 square feet, and owns two office buildings in Baton Rouge, Louisiana
totaling approximately 40,500 square feet. The leases have remaining terms
ranging from one to four years and are at what the Company considers to be
commercially reasonable rental rates. The Company's principal office locations
are in Houston, Beaumont and Nederland, Texas; Baton Rouge and Lake Charles,
Louisiana; Warren and Atlantic City, New Jersey; Miami and Tampa, Florida;
Louisville, Kentucky; Al-Khobar, Riyadh and Yanbu, Saudi Arabia; and Abu Dhabi,
United Arab Emirates. The Company's Warren, New Jersey offices, comprising
approximately 90,300 square feet, are leased from entities controlled by certain
of the former stockholders of PS&S under several leases expiring in 2008.

     Engineering and assembly of the Company's control and instrumentation
systems is performed at its approximately 21,000 square foot leased facility in
Beaumont, Texas, and at its approximately 30,000 square foot owned facility in
Houston. The Beaumont property is leased from a partnership owned one-third by
each of Petrocon, Michael L. Burrow and another Petrocon shareholder, which
lease expires in 2000.

     The Company builds its modular gas processing plants in Houston, Texas at a
five-acre site, which includes approximately 33,000 square feet of owned office
and shop space and an adjacent 2,300 square foot leased paint and sandblasting
building, which is leased from a former GEI stockholder.

     The Company believes its office and other facilities are well-maintained
and adequate for the Company's existing and planned operations at each operating
location.

EMPLOYEES

     As of March 31, 1998, the Company had approximately 1,610 regular,
full-time employees, including 1,105 engineers, scientists, chemists, designers
and draftsmen, 225 construction managers, inspectors and technicians, 29
production support staff, and 251 administrative and clerical personnel. At that
date, approximately 1,606 Company employees were based in the United States, of
which approximately 509 were placed on assignment in client facilities, and
approximately 4 employees were based in foreign countries. In addition, at March
31, 1998, PAL employed 239 foreign-based employees. The table below shows the
number of regular, full-time employees in each of the Company's engineering
segments at the dates indicated.

                                          DECEMBER 31,
                                 -------------------------------     MARCH 31,
                                   1995       1996       1997          1998
                                 ---------  ---------  ---------     ---------
Engineering Services...........      1,473      1,322      1,393        1,415
Engineered Systems.............        150        195        221          195
                                 ---------  ---------  ---------     ---------
     Total.....................      1,623      1,517      1,614        1,610
                                 =========  =========  =========     =========

     The Company is not a party to any collective bargaining agreements, has not
experienced any strikes or work stoppages and believes its relationship with its
employees is good.

GOVERNMENT REGULATION

     The Company and its clients are subject to various evolving foreign,
federal, state and local laws and regulations, including those relating to the
environment, health and safety. To date, the Company has mostly benefited from
these laws and regulations and their impact on its clients, and the cost of the
Company's own compliance has not been material, but the fact that such laws and
regulations are changed frequently makes uncertain both the Company's expected
continuing benefits and costs associated with such laws and regulations. The
modification of existing laws or regulations or the adoption of new laws or
regulations affecting the Company's clients or its own operations or industry
could adversely affect the Company.

     The Company and members of its professional staff are subject to a variety
of state, local and foreign licensing, registration and other regulatory
requirements governing the practice of engineering. Company professionals are
licensed or registered in approximately 46 states and foreign jurisdictions. The
Company endeavors to be in compliance with all applicable licensing and
registration requirements, and does not

                                       42
<PAGE>
believe that any failure to be in such compliance at any given time will have a
material adverse effect on its operations or revenues. Nor does the Company
believe that such licensing or registration requirements will offer any material
impediment to the Company's proposed geographic expansion due to the prevalence
of reciprocity arrangements, the relative ease of the licensing process in most
jurisdictions, and the number and varied disciplines and qualifications of its
professional staff.

RISK MANAGEMENT; LITIGATION

     In performing services for its clients, the Company could potentially be
liable for breach of contract, personal injury, property damage or negligence,
including professional errors and omissions. The Company often agrees to
indemnify its clients for losses and expenses incurred by them as a result of
the Company's negligence and, in certain instances, the concurrent negligence of
the clients. A portion of the Company's activities relate to environmental
services which involve significant risks to the Company with respect to
environmental damage, personal injury, fines and costs imposed by regulatory
agencies. Although liabilities arising from environmental regulations are more
directly applicable to the Company's clients, under certain circumstances those
regulations could impose liability on the Company, including on a joint and
several liability basis. The Company's quality control and assurance program
includes a control function to establish standards and procedures for
performance and documentation of performance project tasks, and an assurance
function to audit the control function and to monitor compliance with procedures
and quality standards. The Company maintains liability insurance for bodily
injury and third-party property damage, professional errors and omissions, and
workers compensation coverage which it considers sufficient to insure against
these risks, subject to self-insured amounts.

     The Company is, from time to time, a party to litigation arising in the
ordinary course of its business, most of which involves contract claims,
professional errors and omissions claims and claims for personal injury or
property damage incurred in connection with its operations. The Company is not
currently involved in any litigation that the Company believes will have a
material adverse effect on its financial condition or results of operations.

     No assurance can be given that the Company's insurance will be sufficient
under all circumstances to protect the Company against significant claims for
damages. The occurrence of a significant event not fully insured against could
materially and adversely affect the Company's financial condition and results of
operations. Moreover, no assurance can be given that the Company will be able to
maintain adequate insurance in the future at commercially reasonable rates or on
acceptable terms.

                                       43
<PAGE>
                                   MANAGEMENT

DIRECTORS AND EXECUTIVE OFFICERS

     The following table sets forth certain information regarding the
individuals who will be OEI's directors and executive officers when the Offering
closes (ages are as of May 15, 1998):
<TABLE>
<CAPTION>
                                                                                                   DIRECTOR
                NAME                    AGE                        POSITION                          CLASS
- -------------------------------------   ----   ------------------------------------------------   -----------
<S>                                     <C>    <C>                                                <C>
Michael L. Burrow, P.E.(1)(4)........    50    Chairman of the Board, Chief Executive Officer     Class III
Gary J. Coury(1)(4)..................    53    President, Chief Operating Officer, Director       Class II
Rick Berry...........................    45    Executive Vice President, Chief Financial
                                               Officer
Dana W. Swindler.....................    39    Executive Vice President -- Mergers and
                                                 Acquisitions
Robert W. Raiford....................    53    Controller
Nolan Lehmann(1)(2)(3)(4)............    54    Director                                           Class II
Gary L. Forbes(1)(2)(3)(4)...........    54    Director                                           Class I
W. Bernard Pieper*(2)(3).............    66    Director                                           Class I
Bob G. Gower*(2)(3)..................    60    Director                                           Class III
C. Roland Haden*(2)(3)...............    58    Director                                           Class II
</TABLE>
- ------------

 * Appointment will become effective on closing of the Offering.

(1) Member of the Board's Executive Committee.

(2) Member of the Board's Audit Committee.

(3) Member of the Board's Compensation Committee.

(4) Member of the Board's Nominating Committee.

     MICHAEL L. BURROW has been the Chairman, Chief Executive Officer and a
director of OEI since its formation in October 1997. Mr. Burrow founded Petrocon
and has served as its Chairman and Chief Executive Officer since its inception
in 1988. Mr. Burrow is a registered mechanical engineer and has approximately 27
years of experience in the engineering industry.

     GARY J. COURY has been the President, Chief Operating Officer and a
director of OEI since its formation in October 1997. Mr. Coury has served as the
President and Chief Operating Officer of Petrocon since September 1995. Before
then, he served for eight years in various positions with Petrocon and its
predecessors, subsidiaries and affiliates, including as the President of PAL and
the President of international operations and a Vice President/General Manager,
of Petrocon's Houston operations from 1989 to 1993. Mr. Coury has over 30 years
of experience in the engineering industry.

     RICK BERRY was appointed Executive Vice President and Chief Financial
Officer of OEI in March 1998. From 1989 to March 1998, Mr. Berry served as
Executive Vice President, Chief Financial Officer, Secretary and Treasurer of
TEI, Inc., a publicly traded environmental services company. From 1979 to 1989,
he served as Senior Vice President Finance of Mischer Enterprises, Inc., and
prior to that time, was employed by Peat Marwick, Mitchell & Co. Mr. Berry is a
certified public accountant.

     DANA W. SWINDLER has been the Executive Vice President -- Mergers and
Acquisitions of OEI since October 1997. From June 1996 to the present, Mr.
Swindler served in that same capacity for Petrocon. Mr. Swindler served as the
Chief Financial Officer and a director of Maxim Technologies, Inc., a Dallas,
Texas based engineering and environmental company from April 1995 to May 1996,
and as the Executive Vice President of Maxim Engineers, Inc., a predecessor of
Maxim Technologies, Inc., commencing in April 1992.

     ROBERT W. RAIFORD has been the Controller of OEI since its formation in
October 1997. He has served as the Executive Vice-President, Administrative
Services and Chief Financial Officer of Petrocon, since 1988.

                                       44
<PAGE>
     NOLAN LEHMANN has been a director of OEI since its formation in October
1997. Since 1983, Mr. Lehmann has served as the President and a director of
Equus Capital Management Corporation, a registered investment advisor. He also
serves as the President and a director of Equus II, a registered investment
company. Mr. Lehmann serves as a director of Allied Waste Industries, Inc., a
solid waste management company, American Residential Services, Inc., a
residential services company, Brazos Sportswear, Inc., a casual sportswear
company, Drypers Corporation, a manufacturer of disposable diapers, and Garden
Ridge Corporation, a specialty retailer, all of which are public companies. He
was appointed to the Board of Directors under OEI's funding agreement with Equus
II. See "Certain Transactions."

     GARY L. FORBES has been a director of OEI since October 1997. Since 1991,
Mr. Forbes has served as a Vice President of Equus Capital Management
Corporation, a registered investment advisor, and as a Vice President of Equus
II. He serves as a director of Consolidated Graphics, Inc., a consolidator of
commercial printing companies, Drypers Corporation, a manufacturer of disposable
diapers, NCI Building Systems, Inc., a manufacturer of prefabricated metal
buildings, and Advanced Technical Products, Inc., a manufacturer of high
performance composite parts for the aerospace and defense industries, all of
which are publicly owned companies. Mr. Forbes was also appointed to the Board
of Directors under OEI's funding agreement with Equus II. See "Certain
Transactions."

     W. BERNARD PIEPER will be appointed a director of OEI upon the closing of
the Offering. Mr. Pieper retired from Halliburton Company in January 1996, after
a 38-year career with Halliburton Company and its Brown & Root, Inc. subsidiary.
He was named President of Brown & Root, Inc. in 1989, and served in that
capacity until 1992, when he became Vice Chairman of Halliburton Company. In
1994, he added the title of Chief Operating Officer and became responsible for
Halliburton's three operating units: Brown & Root, Inc., Halliburton Energy
Services and Highlands Insurance Company. Mr. Pieper is a fellow of the American
Society of Civil Engineers and serves on the Board of Governors, the George R.
Brown School of Engineering Advisory Board, and the Jones Graduate School of
Administration Council of Overseers at Rice University, and is the current
Chairman of the Engineering Advisory Board at Rice. Mr. Pieper serves as a
director of Union Texas Petroleum Holdings, Inc., a public independent oil and
gas company, and Highlands Insurance Group, Inc., a public insurance company.

     BOB G. GOWER will be appointed a director of OEI upon the closing of the
Offering. Mr. Gower is Chairman and Chief Executive Officer of Specified Fuels &
Chemicals, L.L.C., a custom processor of specialty chemicals and manufacturer of
reference fuels. From 1988 to 1997, he served first as President and Chief
Executive Officer and then as Chairman and Chief Executive Officer of Lyondell
Petrochemical Company. Mr. Gower serves as a director of Kirby Corporation, a
public marine transportation company.

     C. ROLAND HADEN will be appointed a director of OEI upon the closing of the
Offering. Since 1993, Dr. Haden has served as Vice Chancellor and Dean of
Engineering of Texas A&M University. He serves as the Chair for the Texas
Society of Professional Engineers PEE Committee and the Engineering Deans
Council of Texas, and as director of the Engineering Dean Council ASEE, and has
affiliations with several other professional and engineering organizations. Dr.
Haden also serves as a director of Inter-Tel, Inc., a public communication
company. He has served in various academic capacities for over 30 years,
including Dean and Professor of Engineering and Applied Services at Arizona
State University and Vice Chancellor for Academic Affairs at Louisiana State
University. Dr. Haden received his Ph.D. from University of Texas, Austin and
his MS from California Institute of Technology.

CLASSES OF DIRECTORS; DIRECTOR COMPENSATION

     The Board of Directors is divided into three classes. Following a
transitional period, the directors of each class will serve for three years,
with one class being elected each year at the annual stockholders' meeting.
During the transitional period, the terms of the Class I directors will expire
at the 1999 meeting, the terms of the Class II directors will expire at the 2000
meeting and the terms of the Class III directors will expire at the 2001
meeting. Classification of the Board could lengthen the time necessary to change
the composition of a majority of the members comprising the Board. In general,
at least two annual meetings of

                                       45
<PAGE>
stockholders will be necessary for stockholders to effect a change in a majority
of the members of the Board.

     Directors who are employees of the Company do not receive additional
compensation for serving as directors. Following the closing of the Offering,
each director who is not an employee of the Company initially will receive a fee
of $2,500 for each board meeting attended and $1,500 for each board committee
meeting attended and will periodically be granted options under the Incentive
Plan for the purchase of Common Stock. See "-- Incentive Plan." When the
Offering closes, each of OEI's five outside directors will be granted options to
purchase 10,000 shares of Common Stock at an exercise price per share equal to
the initial public offering price. The Company will reimburse directors for
out-of-pocket expenses incurred in attending Board of Directors or Board
committee meetings in their capacity as directors.

EXECUTIVE COMPENSATION; EMPLOYMENT AGREEMENTS

     On closing of the Offering, the Company will have employment agreements
with Messrs. Burrow, Coury, Berry, Swindler and Raiford, which provide for
annual base salaries of $300,000, $250,000, $175,000, $200,000 and $162,000,
respectively. As of the closing of the Pending Acquisitions, certain Acquired
Companies will enter into employment agreements with a total of 13 of their key
officers, including Jerry G. Gulsby, the President of GEI, William Paulus, Jr.,
Anthony J. Sartor and Philip A. Falcone, the principal stockholders and
executive officers of PS&S, Kenneth W. Castlebury, T.L. Lynn, Kenneth W. Oliver
and John W. White, the principal stockholders and executive officers of W-I, and
James W. Kerr and Jamie Ghazi, stockholders and executive officers of C&I. The
following is a summary of the material terms of the employment agreements of
these executives and key officers, a form of which agreement has been filed as
an exhibit to the Registration Statement of which this Prospectus is a part.
Each of these agreements has a three-year term subject to the right of the
Company to terminate the employee's employment at any time after one year. If
the employee's employment is terminated by the Company within the first three
years without cause (as defined), the employee will be entitled to the payment
of any annual base salary and continuation of health insurance benefits for one
year following termination. Each employment agreement contains a covenant
limiting competition with the Company following the termination of employment
for a period of (i) four years from the effective date of the employment
agreement if employment is terminated for cause (as defined) or voluntarily by
the executive or (ii) six months following the termination if employment is
terminated without cause or due to disability, subject to the right of the
Company, in the latter circumstances, to extend the period of restricted
competition for up to an additional one year by continuing the executive's
annual base salary and insurance benefits for the additional year.

     The Company will also pay one-time cash bonuses in the amount of $60,000 to
each of Messrs. Coury and Swindler for their efforts and assistance in
connection with, and conditioned on the closing of, the Pending Acquisitions and
the Offering.

INCENTIVE PLAN

     The description set forth below summarizes the principal terms and
conditions of the Incentive Plan, does not purport to be complete and is
qualified in its entirety by reference to the Incentive Plan, a copy of which
has been filed as an exhibit to the Registration Statement of which this
Prospectus is a part.

     GENERAL.  The objectives of the Incentive Plan, which was approved by the
Board of Directors and stockholders, are to attract and retain selected key
employees, consultants and outside directors, encourage their commitment,
motivate their performance, facilitate their obtaining ownership interests in
the Company (aligning their personal interests to those of the Company's
stockholders) and enable them to share in the long-term growth and success of
the Company.

     SHARES SUBJECT TO INCENTIVE PLAN.  Under the Incentive Plan, the Company
may issue Incentive Awards (as defined below) covering at any one time an
aggregate of the greater of (i) 2,000,000 shares of Common Stock and (ii) 10% of
the number of shares of Common Stock issued and outstanding on the last day of
the then preceding calendar quarter. No more than 2,000,000 shares of Common
Stock will be available for ISOs (as defined below). As of the closing of the
Pending Acquisitions, options covering

                                       46
<PAGE>
1,765,223 shares of Common Stock will be outstanding or allocated for grant and
234,777 shares of Common Stock then will be available for subsequent Incentive
Awards. The number of securities available under the Incentive Plan and
outstanding Incentive Awards are subject to adjustments to prevent enlargement
or dilution of rights resulting from stock dividends, stock splits,
recapitalization or similar transactions or resulting from a change in
applicable laws or other circumstances.

     ADMINISTRATION.  The Incentive Plan will be administered by the
compensation committee of the Board of Directors (the "Committee"). Following
the Offering, the Committee will consist solely of directors ("Outside
Directors") each of whom is (i) an "outside director" under Section 162(m) of
the Internal Revenue Code of 1986, as amended (the "Code"), and (ii) a
"non-employee director" under Rule 16b-3 under the Securities Exchange Act of
1934, as amended (the "Exchange Act"). The Committee may delegate to the chief
executive officer or other senior officers of the Company its duties under the
Incentive Plan, except with respect to any authority to grant Incentive Awards
or take other action with respect to persons who are subject to Section 16 of
the Exchange Act or Section 162(m) of the Code. In the case of an Incentive
Award to an Outside Director, the Board of Directors shall act as the Committee.
Subject to the express provisions of the Incentive Plan, the Committee is
authorized to, among other things, select grantees under the Incentive Plan and
determine the size, duration and type, as well as the other terms and conditions
(which need not be identical), of each Incentive Award. The Committee also
construes and interprets the Incentive Plan and any related agreements. All
determinations and decisions of the Committee are final, conclusive and binding
on all parties. The Company will indemnify members of the Committee against any
damage, loss, liability, cost or expenses arising in connection with any claim,
action, suit or proceeding by reason of any action taken or failure to act under
the Incentive Plan, except for any such act or omission constituting willful
misconduct or gross negligence.

     ELIGIBILITY.  Key employees, including officers (whether or not they are
directors), and consultants of the Company and non-employee directors are
eligible to participate in the Incentive Plan. A key employee generally is any
employee of the Company who, in the opinion of the Committee, is in a position
to contribute materially to the growth and development and to the financial
success of the Company.

     TYPES OF INCENTIVE AWARDS.  Under the Incentive Plan, the Committee may
grant (i) incentive stock options ("ISOs"), as defined in Section 422 of the
Code, (ii) "nonstatutory" stock options ("NSOs"), (iii) stock appreciation
rights ("SARs"), (iv) shares of restricted stock, (v) performance units and
performance shares, (vi) other stock-based awards, and (vii) supplemental
payments dedicated to the payment of income taxes (collectively, "Incentive
Awards"). ISOs and NSOs are sometimes referred to collectively herein as
"Options." The terms of each Incentive Award will be reflected in an agreement
(the "Incentive Agreement") between the Company and the participant.

     OPTIONS.  Generally, Options must be exercised within 10 years of the grant
date. ISOs may be granted only to employees, and the exercise price of each ISO
may not be less than 100% of the fair market value of a share of Common Stock on
the date of grant. The Committee will have the discretion to determine the
exercise price of each NSO granted under the Incentive Plan. To the extent the
aggregate fair market value of shares of Common Stock with respect to which ISOs
are exercisable for the first time by any employee during any calendar year
exceeds $100,000, those Options must be treated as NSOs.

     The exercise price of each Option is payable in cash or, in the discretion
of the Committee, by the delivery of shares of Common Stock owned by the
Optionee, or the withholding of shares that would otherwise be acquired on the
exercise of the Option, or by any combination of the foregoing.

     An employee will not recognize any income for federal income tax purposes
at the time an ISO is granted, or on the qualified exercise of an ISO, but
instead will recognize capital gain or loss (as applicable) upon the subsequent
sale of shares acquired in a qualified exercise. The exercise of an ISO is
qualified if a participant does not dispose of the shares acquired by the
participant's exercise within two years after the ISO grant date and one year
after such exercise. The Company is not entitled to a tax deduction as a result
of the grant or qualified exercise of an ISO.

                                       47
<PAGE>
     An optionee will not recognize any income for federal income tax purposes,
nor will the Company be entitled to a deduction, at the time an NSO is granted.
However, when an NSO is exercised, the optionee will recognize ordinary income
in an amount equal to the difference between the fair market value of the shares
received and the exercise price of the NSO, and the Company will generally
recognize a tax deduction in the same amount at the same time.

     The foregoing federal income tax information is a summary only, does not
purport to be a complete statement of the relevant provisions of the Code and
does not address the effect of any state, local or foreign taxes.

     SARS.  Upon exercise of an SAR, the holder will receive cash, shares of
Common Stock or a combination thereof, as specified in the related Incentive
Agreement, the aggregate value of which equals the amount by which the fair
market value per share of the Common Stock on the date of exercise exceeds the
exercise price of the SAR, multiplied by the number of shares underlying the
exercised portion of the SAR. An SAR may be granted in tandem with or
independently of an NSO. SARs will be subject to such terms and conditions and
will be exercisable at such times as determined by the Committee, provided, that
the exercise price per share must equal at least 100% of the fair market value
of a share of a Common Stock on the date of grant. The value of an SAR may be
paid in cash, shares of Common Stock or both in combination, as determined by
the Committee.

     RESTRICTED STOCK.  Restricted stock may be subject to substantial risk of
forfeiture, a restriction on transferability or rights of repurchase or first
refusal of the Company, as determined by the Committee. Unless otherwise
determined by the Committee, during the period of restriction, the grantee will
have all other rights of a stockholder, including the right to vote and receive
dividends on the shares.

     PERFORMANCE UNITS AND PERFORMANCE SHARES.  Performance units and
performance shares may be granted only to employees and consultants. For each
performance period (to be determined by the Committee), the Committee will
establish specific financial or non-financial performance objectives, the number
of performance units or performance shares and their contingent values, which
values may vary depending on the degree to which such objectives are met.

     OTHER STOCK-BASED AWARDS.  Other stock-based awards are awards denominated
or payable in, valued in whole or in part by reference to or otherwise related
to shares of Common Stock. Subject to the terms of the Incentive Plan, the
Committee may determine any terms and conditions of other stock-based awards,
provided that, in general, the amount of consideration to be received by the
Company shall be either (i) no consideration other than services actually
rendered or to be rendered (in the case of the issuance of shares) or (ii) in
the case of an award in the nature of a purchase right, consideration (other
than services rendered) at least equal to 50% of the fair market value of the
shares covered by such grant on the date of grant. Payment or settlement of
other stock-based awards will be in shares of Common Stock or in other
consideration related to such shares.

     SUPPLEMENTAL PAYMENTS FOR TAXES.  The Committee may grant, in connection
with an Incentive Award (except for ISOs), a supplemental payment in an amount
not to exceed the amount necessary to pay the federal and state income taxes
payable by the grantee with respect to the Incentive Award and the receipt of
the supplemental payment.

     OTHER TAX CONSIDERATIONS.  Upon accelerated exercisability of Options and
accelerated lapsing of restrictions upon restricted stock or other Incentive
Awards in connection with a Change in Control (as defined in the Incentive
Plan), certain amounts associated with such Incentive Awards could, depending
upon the individual circumstances of the participant, constitute "excess
parachute payments" under Section 280G of the Code, thereby subjecting the
participant to a 20% excise tax on those payments and denying the Company a
corresponding deduction. The limit on the deductibility of compensation under
Section 162(m) of the Code is also reduced by the amount of any excess parachute
payments. Whether amounts constitute excess parachute payments depends upon,
among other things, the value of the Incentive Awards accelerated and the past
compensation of the participant.

                                       48
<PAGE>
     Taxable compensation earned by executive officers who are subject to
Section 162(m) of the Code in respect of Incentive Awards is subject to certain
limitations set forth in the Incentive Plan generally intended to satisfy the
requirements for "qualified performance-based compensation," but no assurance
can be given that OEI will be able to satisfy these requirements in all cases,
and the Company may, in its sole discretion, determine in one or more cases that
it is in its best interest not to satisfy these requirements even if it is able
to do so.

     TERMINATION OF EMPLOYMENT AND CHANGE IN CONTROL.  Except as otherwise
provided in the applicable Incentive Agreement, if a participant's employment or
other service with the Company (or its subsidiaries) is terminated (i) other
than due to his death, Disability, Retirement or for Cause (each capitalized
term as defined in the Incentive Plan), his then exercisable Options will remain
exercisable for 60 days after such termination, (ii) by reason of Disability or
death, his then exercisable Options will remain exercisable for one year
following such termination, (iii) due to his retirement, his then exercisable
Options will remain exercisable for six months (except for ISOs, which will
remain exercisable for three months), or (iv) for Cause, all his Options will
expire at the commencement of business on the date of such termination.

     Upon a Change in Control of OEI, any restrictions on restricted stock and
other stock-based awards will be deemed satisfied, all outstanding Options and
SARs may become immediately exercisable and all the performance shares and units
and any other stock-based awards may become fully vested and deemed earned in
full, at the discretion of the Committee. These provisions could in some
circumstances have the effect of an "anti-takeover" defense because, as a
result of these provisions, a Change in Control of OEI could be more difficult
or costly.

     INCENTIVE AWARDS NONTRANSFERABLE.  No Incentive Award may be assigned, sold
or otherwise transferred by a participant, other than by will or by the laws of
descent and distribution, or be subject to any encumbrance, pledge, lien,
assignment or charge. An Incentive Award may be exercised during the
participant's lifetime only by the participant or the participant's legal
guardian.

     AMENDMENT AND TERMINATION.  The Board of Directors may amend or terminate
the Incentive Plan at any time, except that the Incentive Plan may not be
modified or amended, without stockholder approval, if such amendment would (i)
increase the number of shares of Common Stock which may be issued thereunder,
except in connection with a recapitalization of the Common Stock, (ii) amend the
eligibility requirements for employees to purchase Common Stock under the
Incentive Plan, (iii) increase the maximum limits on Incentive Awards that may
be issued to executive officers who are subject to Section 162(m) of the Code,
(iv) extend the term of the Incentive Plan or (v) decrease the authority granted
to the Committee under the Incentive Plan in contravention of Rule 16b-3 under
the Exchange Act. No termination or amendment of the Incentive Plan shall
adversely affect in any material way any outstanding Incentive Award previously
granted to a participant without his consent.

     On the closing of the Offering, the Company expects Options to purchase a
total of 1,765,223 shares of Common Stock will be outstanding or allocated for
grant. Of these Options, 768,384 Options represent Replacement Options
(including 2,722, 238,038, 146,734 and 153,288 options held by Messrs. Burrow,
Coury, Raiford and Swindler, respectively). These replacement options have a
weighted exercise per share of $7.68. On or prior to closing of the Offering,
additional Options to purchase shares of Common Stock will be granted or
allocated for grant to the following persons to purchase the respective number
of shares indicated: (i) Mr. Burrow (15,512 shares); (ii) Mr. Coury, (13,812
shares); (iii) Mr. Berry (36,564 shares); (iv) Mr. Swindler (11,046 shares); (v)
Mr. Raiford (6,984 shares); (vi) Messrs. Lehmann, Forbes, Pieper, Gower and
Haden (10,000 shares each); and (vii) other employees as a group (862,921
shares). All these additional options will have an initial exercise price per
share equal to the initial public offering price and will become exercisable as
to 25% of such shares six months after the date the Offering closes and as to
25% of such shares on each anniversary of that date.

EMPLOYEE STOCK PURCHASE PLAN

     The Company's Employee Stock Purchase Plan for United States employees (the
"Employee Purchase Plan") was adopted by the Board of Directors in April 1998.
A total of 300,000 shares of Common Stock

                                       49
<PAGE>
has been reserved for issuance under the Employee Purchase Plan. The Employee
Purchase Plan, which is intended to qualify under Section 423 of the Code, has
quarterly offering periods each year beginning on the first trading day on or
after January 1, April 1, July 1 and October 1, respectively, except for the
first such offering period which commences on the first trading day on or after
the effective date of the Offering and ends on the last trading day on or before
June 30, 1998. The Employee Purchase Plan is administered by the Board of
Directors or by a committee appointed by the Board. A United States employee is
eligible to participate if the employee is (i) customarily employed by the
Company or any participating subsidiary for at least 20 hours per week and more
than five months in any calendar year and (ii) employed by the Company or any
participating subsidiary on the effective date of the Employee Purchase Plan, or
if not employed on such effective date, has completed at least six consecutive
months of employment with the Company or any participating subsidiary. The
Employee Purchase Plan permits eligible employees to purchase Common Stock
through payroll deductions of up to 15% of an employee's compensation (including
commissions and overtime, but excluding other bonuses and incentive
compensation), up to a maximum of $25,000 for all offering periods ending within
the same calendar year. The price of stock purchased under the Employee Purchase
Plan is 90% of the lower of the fair market value of the Common Stock at the
beginning or at the end of each offering period. Employees may end their
participation at any time during an offering period, and they will be repaid
their payroll deductions to date. Participation ends automatically upon
termination of employment with the Company or any participating subsidiary.

     Rights granted under the Employee Purchase Plan are not transferable by a
participant other than by will, the laws of descent and distribution, or as
otherwise provided under the Employee Purchase Plan. The Employee Purchase Plan
provides that, in the event of a merger of OEI with or into another corporation
or a sale of substantially all of OEI's assets, the Board of Directors shall
shorten the offering period then in progress (so that employees' rights to
purchase stock under the Plan are exercised prior to the merger or sale of
assets). The Employee Purchase Plan will terminate in April 2008. The Board of
Directors has the authority to amend or terminate the Employee Purchase Plan,
except that no such action may adversely affect any outstanding rights to
purchase stock under the Employee Purchase Plan.

BONUS AWARDS; OTHER PLANS

     The 1998 bonuses for officers and key employees of the Company, if any,
will be based upon the performance standards to be established by the
Compensation Committee. The Company expects the Compensation Committee to
establish such performance standards for the remainder of 1998 following the
closing of the Offering.

     The Company has adopted or intends to adopt deferred compensation,
supplemental disability, supplemental life and retirement or other benefit or
welfare plans in which executive officers of the Company will be eligible to
participate.

     The Compensation Committee will be established on the closing of the
Offering and will be comprised solely of non-employee directors of OEI. In the
past, matters with respect to the compensation of executive officers of OEI were
determined by its Board of Directors, including those members who serve as
executive officers.

                                       50
<PAGE>
                              CERTAIN TRANSACTIONS

ORGANIZATION OF OEI
   
     OEI was formed in October 1997 by Petrocon's management to conduct the
Offering, simultaneously consummate the Pending Acquisitions and continue
Petrocon's successful acquisition program. OEI was capitalized with $1,000
provided by Messrs. Burrow, Coury, Berry and Swindler and Equus II, in exchange
for 1,828,368 shares of Common Stock. Mr. Lehmann, a director of OEI, is a
director and the President of Equus II, and Mr. Forbes, also an OEI director, is
a Vice President of Equus II.
    
     Since October 1997, Equus II has advanced funds to OEI under a $2.5 million
short-term promissory note (the "Equus Note") for use in connection with OEI's
efforts to conduct the Offering and consummate the Pending Acquisitions. The
Equus Note bears interest at a designated prime rate plus 1/2%. At March 31,
1998, approximately $1.0 million was outstanding under the Equus Note. OEI
expects to borrow an additional $1.5 million under the Equus Note before the
Offering closes. The Company intends to repay the Equus Note in full from
proceeds of the Offering.

     Concurrently with the closing of the Offering, OEI will consummate the
Pending Acquisitions. The consideration to be paid by the Company in the Pending
Acquisitions consists of (i) approximately $27.8 million in cash, (ii) 5,053,027
shares of Common Stock and (iii) approximately $3.4 million and 654,099 shares
to be placed in escrow with respect to one of the Pending Acquisitions. In
addition, the Company will assume certain of the indebtedness of Petrocon and
the Acquired Companies (approximately $28.1 million as of December 31, 1997).

     Subject to certain adjustments described below, the following table sets
forth for Petrocon and each Acquired Company the cash and shares of Common Stock
to be paid and issued to its stockholders in the Pending Acquisitions.

                                               CASH          SHARES OF
COMPANY                                    CONSIDERATION    COMMON STOCK
- ----------------------------------------   -------------    ------------
Petrocon................................   $  12,715,786       2,118,888
PS&S....................................       4,521,905         879,258
GEI.....................................       2,786,170         541,757
W-I.....................................       4,901,814         953,129
C&I.....................................       2,879,981         559,995
                                           -------------    ------------
     Total..............................   $  27,805,656       5,053,027
                                           =============    ============
   
     The Company will also assume and repay an aggregate of $28.7 million of
indebtedness of Petrocon and certain of the Acquired Companies ($21.8 million of
which will be repaid from proceeds of the Offering and $1.4 million of which
will be repaid from cash on hand), as follows: Petrocon -- $16.4 million;
PS&S -- $3.2 million; GEI -- $4.6 million; W-I -- $4.3 million; and C&I -- $0.1
million. Of the $4.6 million of GEI indebtedness, approximately $3.0 million is
payable to the GEI stockholders relating to the June 1998 settlement of a legal
judgment entered against GEI. See Notes 8 and 10 to the Consolidated Financial
Statements of GEI. In addition, the Company will place approximately $3.4
million and 654,099 shares of Common Stock in escrow in connection with the GEI
acquisition, which will be paid to the former GEI stockholders, or returned to
the Company, depending on the future financial performance of GEI. See "The
Company -- Summary of Terms of the Pending Acquisitions."
    
     Prior to the closing of the Pending Acquisitions, certain Acquired
Companies may make additional distributions to their stockholders of certain
assets and related liabilities with an aggregate net book value of approximately
$9.1 million.

     Pursuant to the acquisition agreements, certain stockholders of each of
Petrocon and the Acquired Companies have agreed not to compete with the Company
for a period of three years commencing on the date of closing of the Pending
Acquisitions.

                                       51
<PAGE>
     In connection with the Pending Acquisitions, OEI will grant certain
registration rights to former stockholders of Petrocon and the Acquired
Companies. OEI has also granted certain registration rights to Equus II. See
"Shares Eligible for Future Sale."

PENDING ACQUISITIONS INVOLVING CERTAIN OFFICERS, DIRECTORS AND STOCKHOLDERS

     Persons who are or will become directors, executive officers, or beneficial
owners of 5% or more of the Common Stock will receive the following
consideration in the Pending Acquisitions for their equity interests in Petrocon
and the Acquired Companies.

                                            CASH            SHARES OF
NAME                                    CONSIDERATION    COMMON STOCK(1)
- -------------------------------------   -------------    ---------------
Michael L. Burrow(2).................    $ 2,409,238          451,188
Gary J. Coury........................         35,397            6,629
Robert W. Raiford....................        301,811           56,521
Jerry G. Gulsby(3)...................      2,786,170          541,757
                                        -------------    ---------------
     Total...........................    $ 5,532,616        1,056,095
                                        =============    ===============

- ------------

(1) Excludes options to purchase 540,782 shares of Common Stock which are to be
    granted on closing of the Offering in replacement of Petrocon options as
    follows: Michael L. Burrow -- 2,722 shares at an exercise price per share of
    $6.52; Gary J. Coury -- 238,038 shares at exercise prices per share of $6.52
    (133,327 shares) and $9.55 (104,711 shares); Dana W. Swindler -- 153,288
    shares at an exercise price per share of $6.52; and Robert W.
    Raiford -- 146,734 shares at exercise prices per share of $9.55 (104,711
    shares) and $6.52 (42,023 shares).

(2) Represents cash and shares payable to the M.L. Burrow Family Partnership,
    Ltd., in which Mr. Burrow has a 95% partnership interest.
   
(3) Includes approximately $0.8 million and 157,110 shares issuable to certain
    trusts for the benefit of Mr. Gulsby's descendents. Excludes (i)
    approximately $3.4 million and 654,099 shares of Common Stock which will be
    placed in escrow in connection with the GEI acquisition, and which will be
    subject to a maximum three-year earnout arrangement, (ii) approximately $3.1
    million of advances from GEI to Mr. Gulsby to be assumed by OEI upon
    consummation of the GEI acquisition, which, for accounting purposes, will be
    eliminated on the consolidation of GEI with OEI, (iii) approximately $3.0
    million of indebtedness payable to the GEI stockholders relating to the June
    1998 settlement of an accrued legal judgment entered against GEI and (iv)
    the assignment of retainages associated with certain GEI client contracts
    having a net book value of approximately $3.7 million, plus approximately
    $0.1 million for adjustments in retainages between December 31, 1997 and the
    closing of the Pending Acquisitions. See Notes 8 and 10 to the Consolidated
    Financial Statements of GEI.
    
REAL ESTATE AND OTHER TRANSACTIONS

     The Company leases office space in Beaumont, Texas from a partnership owned
one-third by each of Petrocon, Mr. Burrow and another Petrocon shareholder. The
lease expires in 2000 and has a present annual rental rate of approximately
$115,000.

     The Company believes the rentals paid under the lease described above
represent fair market rates.

COMPANY POLICY

     In the future, any transactions with directors, officers, employees or
affiliates of the Company are anticipated to be minimal and will, in any case,
be approved in advance by a majority of the Board of Directors, including a
majority of disinterested members of the Board of Directors.

                                       52
<PAGE>
                             PRINCIPAL STOCKHOLDERS

     The following table shows, immediately after giving effect to the closing
of the Pending Acquisitions and the Offering, the beneficial ownership of the
Common Stock of (i) each person who then will beneficially own more than five
percent of the outstanding shares of Common Stock, (ii) each person who then
will be a director of OEI, (iii) each person who then will be an executive
officer of OEI and (iv) all persons who then will be directors and executive
officers of OEI as a group. The table assumes none of these persons intends to
acquire shares directly from the Underwriters in connection with the Offering.
   
                                         SHARES BENEFICIALLY
                                                OWNED
                                          AFTER OFFERING(2)
                                       -----------------------
         BENEFICIAL OWNER(1)             NUMBER        PERCENT
- -------------------------------------  -----------     -------
Equus II Incorporated................    1,218,973       10.3%
     2929 Allen Parkway, Suite 2500
     Houston, Texas 77019
Jerry G. Gulsby(3)...................    1,195,856       10.1
     1250 Indiana Drive
     Humble, Texas 77347
Michael L. Burrow(4).................      661,104        5.6
     2727 North Loop West, Suite 400
     Houston, TX 77009
Gary J. Coury(5).....................      281,356        2.4
Rick Berry...........................       36,564          *
Dana W. Swindler(6)..................      189,101        1.6
Robert W. Raiford(7).................       92,832          *
Nolan Lehmann(8).....................    1,218,973       10.3
Gary L. Forbes(8)....................    1,218,973       10.3
W. Bernard Pieper....................      --               *
Bob G. Gower.........................      --               *
C. Roland Haden......................      --               *
All directors and officers as a group
  (10 persons) (4)-(8)...............    2,479,930       20.7%
    
- ------------

 *  Less than 1%.

(1) All persons listed have sole voting and investment power with respect to
    their shares unless otherwise indicated.

(2) Shares shown do not include shares of Common Stock that could be acquired on
    exercise of currently outstanding options which do not vest within 60 days
    hereof.

(3) Includes 654,099 shares which will be placed in escrow on closing of the
    Offering, subject to a maximum three-year earnout arrangement. Mr. Gulsby
    has voting but not investment powers during the period these shares are held
    in escrow. Also, includes 157,110 shares held by certain trusts for the
    benefit of Mr. Gulsby's descendents.

(4) Includes 451,188 shares held by the M.L. Burrow Family Partnership, Ltd., in
    which Mr. Burrow has a 95% partnership interest and includes 2,722 shares of
    Common Stock issuable on exercise of stock options.

(5) Includes 67,653 shares of Common Stock issuable on exercise of stock
    options.

(6) Includes 30,658 shares of Common Stock issuable on exercise of stock
    options.

(7) Includes 36,311 shares of Common Stock issuable on exercise of stock
    options.

(8) All these shares are beneficially owned by Equus II. Messrs. Lehmann and
    Forbes are both directors of OEI. Mr. Lehmann is the President and a
    director of Equus II, Mr. Forbes is a Vice President of Equus II, and each
    of them may be deemed to be beneficial owners of the Equus II shares. Both
    Mr. Lehmann and Mr. Forbes disclaim beneficial ownership of any of those
    shares.

                                       53
<PAGE>
                        SHARES ELIGIBLE FOR FUTURE SALE

     On closing of the Pending Acquisitions and the Offering, 11,835,494 shares
of Common Stock will be outstanding. The shares sold in the Offering (other than
to affiliates of the Company) will be freely tradable by the public. The
remaining outstanding shares of Common Stock (collectively, the "Restricted
Shares") have not been registered under the Securities Act and may be resold
publicly only following their effective registration under the Securities Act or
under an available exemption from the registration requirements of the
Securities Act, such as Rule 144. In general, under Rule 144 as now in effect,
if a minimum of one year elapses from the later of the date of acquisition of
the Restricted Shares from OEI or from an affiliate of OEI, a person (or persons
whose shares of Common Stock are aggregated), including persons who may be
deemed "affiliates" of OEI, would be entitled to sell in any three-month
period a number of Restricted Shares which does not exceed the greater of (i) 1%
of the then outstanding shares of Common Stock and (ii) the average weekly
trading volume of the Common Stock during the period of the four preceding
calendar weeks. Sales under Rule 144 are also subject to certain provisions as
to the manner of sale, notice requirements and the availability of current
public information about the Company. In addition, under Rule 144, if a period
of at least two years elapses from the later of the date Restricted Shares were
acquired from OEI or the date they were acquired from an affiliate of OEI, a
stockholder who is not an affiliate of OEI at the time of sale and has not been
an OEI affiliate for at least three months before the sale would be entitled to
sell shares of Common Stock in the public market immediately, without compliance
with the foregoing Rule 144 requirements. Rule 144 does not require the same
person to hold the Restricted Shares for the applicable periods under certain
circumstances. This Rule 144 summary is not intended to be a complete
description of the Rule. The SEC has proposed amendments to Rule 144 that would,
among other things, eliminate the manner of sale requirements and revise the
notice provisions of the Rule. The SEC has also solicited comments on other
possible changes to Rule 144, including possible revisions to its one- and two-
year holding periods and its volume limitations.

     The Company has agreed not to directly or indirectly sell, offer to sell,
solicit an offer to buy, contract to sell, grant any option to purchase or
otherwise transfer or dispose of any shares of Common Stock or any security
convertible or exchangeable for Common Stock for a period of one year (the
"Lockup Period") following the date of this Prospectus, without the prior
written consent of Smith Barney Inc., except that the Company may issue Common
Stock in connection with acquisitions, pursuant to awards under the Incentive
Plan or pursuant to the exercise of warrants outstanding as of the closing of
the Offering (consisting only of the Replacement Warrants). Further, all of
OEI's officers, directors and current stockholders (including Equus II), and all
persons who acquire shares in connection with the Pending Acquisitions, have
agreed generally not to offer, sell or otherwise dispose of any of their shares
for one year following the date of this Prospectus, without the prior written
consent of Smith Barney Inc. Various factors will be considered by Smith Barney,
Inc. in evaluating whether to consent to a proposed transfer of shares during
the Lockup Period, including the reason for the transfer, the number of shares
requested to be transferred, the potential effect of the transfer on the market
price of the Common Stock, the number of shares previously allowed to be
transferred and other relevant circumstances at the time of the transfer. In
addition, under the terms of the respective purchase agreements, persons
receiving shares of Common Stock in the Pending Acquisitions have agreed with
OEI to similar transfer restrictions for a period of one year following the date
of this Prospectus.

     OEI will enter into a registration rights agreement (the "RRA") with the
former stockholders of Petrocon and the Acquired Companies, which will provide
certain registration rights with respect to the Common Stock issued to such
stockholders in the Pending Acquisitions. The RRA will provide for a single
demand registration right, exercisable by the holders of at least 51.0% of the
shares of Common Stock initially subject to the RRA, to require the Company to
file a registration statement under the Securities Act to register the sale of
not less than 1,000,000 shares by the requesting stockholders and any other
holders of Common Stock parties to the RRA who desire to sell pursuant to such
registration statement. The demand request may not be made until the second
anniversary date after the closing of the Offering. The demand registration
rights conferred by the RRA will terminate on December 31, 2002. Subject to
certain conditions and limitations, the RRA will also give its parties the right
to participate in registrations by the Company of

                                       54
<PAGE>
OEI equity securities in underwritten offerings commencing on the second
anniversary date after the closing of the Offering. In a separate registration
rights agreement with Equus II, OEI has granted Equus II the right to demand two
registrations of shares of Common Stock, and the right to include for its own
account, or for the account of others, subject to certain exceptions, shares of
Common Stock in certain registrations in which the Company registers shares for
its account.

     The RRA requires the Company to pay the costs associated with an offering
subject to the RRA, other than underwriting discounts and commissions and
transfer taxes attributable to the shares sold on behalf of the selling
stockholders. The RRA provides that the number of shares of Common Stock that
must be registered on behalf of selling stockholders is subject to limitation if
the managing underwriter determines that market conditions require such a
limitation. Pursuant to the RRA, OEI will indemnify the selling stockholders,
and the selling stockholders will indemnify OEI, against certain liabilities in
respect of any registration statement or offering covered by the RRA.

     The Company intends to register 3,000,000 shares of Common Stock under the
Securities Act during 1998 for its use in connection with future acquisitions.
These shares generally will be freely tradable after their issuance by persons
not affiliated with the Company; however, sales of these shares during the
Lockup Period would require the prior written consent of Smith Barney Inc.

     The Company intends to file a registration statement on Form S-8 under the
Securities Act to register the shares of Common Stock reserved or to be
available for issuance pursuant to the Incentive Plan and Employee Purchase
Plan. Shares of Common Stock issued pursuant to the Incentive Plan and Employee
Purchase Plan after the effective date of that registration statement generally
will be available for sale in the open market by holders who are not affiliates
of OEI and, subject to the volume and other limitations of Rule 144, by holders
who are affiliates of OEI.

                          DESCRIPTION OF CAPITAL STOCK

     OEI's authorized capital stock consists of 40,000,000 shares of Common
Stock and 1,000,000 shares of preferred stock, par value $.001 per share (the
"Preferred Stock"). At May 15, 1998, 1,828,368 shares of Common Stock and no
shares of Preferred Stock were issued and outstanding. On closing of the Pending
Acquisitions and the Offering, 11,835,494 shares of Common Stock (12,480,494
shares if the underwriters' over-allotment option is exercised in full) will be
issued, outstanding and nonassessable, and 2,122,802 shares of Common Stock will
then be reserved for issuance under all then outstanding options, warrants and
other rights (consisting only of Incentive Plan options and the Replacement
Warrants issued in connection with the Petrocon acquisition). The following is a
summary of the material terms and provisions relevant to the holders of OEI
capital stock contained in the Charter, which is filed as an exhibit to the
Registration Statement of which this Prospectus is a part.

COMMON STOCK

     The Common Stock possesses ordinary voting rights for the election of
directors and in respect of other corporate matters. Each share has one vote.
The Common Stock affords no cumulative voting rights, and the holders of a
majority of the shares voting for the election of directors can elect all
directors if they so choose. The Common Stock carries no preemptive rights and
is not convertible, redeemable, assessable or entitled to the benefits of any
sinking fund. The holders of Common Stock are entitled to dividends in such
amounts and at such times as may be declared by the Board of Directors out of
funds legally available for that purpose, subject to the dividend preference of
any stock ranking senior to the Common Stock, including the Preferred Stock. See
"Dividend Policy" for information regarding the Company's initial dividend
policy.

PREFERRED STOCK

     The Preferred Stock may be issued from time to time by the Board of
Directors as shares of one or more classes or series. Subject to the provisions
of the Charter and limitations prescribed by law, the Board of Directors is
expressly authorized to adopt resolutions to issue the shares, fix the number of
shares and

                                       55
<PAGE>
change the number of shares constituting any series, and provide for the powers,
designations, preferences and relative, participating, optional or other rights,
and the qualifications, limitations or restrictions thereof, including without
limitation, voting powers, dividend rights (including whether dividends are
cumulative), dividend rates, terms of redemption (including sinking fund
provisions), redemption prices, conversion rights and liquidation preferences of
the shares constituting any class or series of the Preferred Stock, in each case
without any further action or vote by the holders of Common Stock. Although OEI
has no present intention to issue shares of Preferred Stock, the issuance of
shares of Preferred Stock, or the issuance of rights to purchase such shares,
could be used to discourage an unsolicited acquisition proposal. For example,
the issuance of a series of Preferred Stock might impede a business combination
by including class voting rights that would enable the holders to block the
transaction; or such an issuance might facilitate a business combination by
including voting rights that would supply a required percentage vote of the
stockholders. In addition, under certain circumstances, the issuance of
Preferred Stock could adversely affect the voting power of the holders of the
Common Stock. The Board of Directors could act in a manner that would discourage
an acquisition attempt or other transaction that some or a majority of the
stockholders might believe to be in their best interests or in which
stockholders might receive a premium for their stock over its then market price.
The Board of Directors does not presently intend to seek stockholder approval
before any issuance of currently authorized stock, unless otherwise required by
law or the rules of any exchange on which OEI's securities are traded.

STATUTORY BUSINESS COMBINATION PROVISION

     OEI is a Delaware corporation and is subject to Section 203 of the DGCL. In
general, Section 203 prevents an "interested stockholder" (defined generally
as a person owning 15% or more of a corporation's outstanding voting stock) from
engaging in a "business combination" (as defined) with a Delaware corporation
for three years following the date the person became an interested stockholder
unless: (i) before the person became an interested stockholder, the board of
directors of the corporation approved the transaction in which the interested
stockholder became an interested stockholder or approved the business
combination; (ii) upon consummation of the transaction that resulted in the
person becoming an interested stockholder, that person owned at least 85% of the
voting stock of the corporation outstanding at the time the transaction
commenced (excluding stock held by directors who are also officers of the
corporation and by employee stock plans that do not permit employees to
determine confidentially whether shares held subject to the plan will be
tendered in a tender or exchange offer); or (iii) following the transaction in
which such person became an interested stockholder, the business combination was
approved by the board of directors of the corporation and authorized at a
meeting of stockholders by the affirmative vote of the holders of 66% of the
outstanding voting stock of the corporation not owned by the interested
stockholder. Under Section 203, its restrictions also do not apply to certain
business combinations proposed by an interested stockholder following the
announcement or notification of one of certain extraordinary transactions
involving the corporation and a person who had not been an interested
stockholder during the previous three years or who became an interested
stockholder with the approval of the majority of the corporation's directors, if
the extraordinary transaction is approved or not opposed by a majority of the
directors who were directors before any person becoming an interested
stockholder during the previous three years or were recommended for election or
elected to succeed such directors by a majority of such directors.

OTHER MATTERS

     Delaware law authorizes a Delaware corporation to limit or eliminate the
personal liability of its directors to the corporation and its stockholders for
monetary damages for breach of a director's fiduciary duty of care. The duty of
care requires that directors, when acting on behalf of the corporation, must
exercise an informed business judgment based on all material information
reasonably available to them. Absent the limitations authorized by Delaware law,
directors are accountable to a Delaware corporation and its stockholders in
monetary damages, for conduct constituting gross negligence in the exercise of
their duty of care. Delaware law enables a Delaware corporation to limit
available relief to equitable remedies such as injunction or rescission. The
Charter limits the liability of directors of OEI to OEI or its stockholders to
the fullest extent permitted by Delaware law. Specifically, no member of the
Board of Directors will be

                                       56
<PAGE>
personally liable for monetary damages for breach of a director's fiduciary duty
as a director, except for liability (i) for any breach of the member's duty of
loyalty to OEI or its stockholders, (ii) for acts or omissions not in good faith
or which involve intentional misconduct or a knowing violation of law, (iii) for
unlawful payments of dividends or unlawful stock repurchases or redemptions as
provided in Section 174 of the DGCL or (iv) for any transaction from which the
member derived an improper personal benefit. This Charter provision may have the
effect of reducing the likelihood of derivative litigation against directors and
may discourage or deter stockholders or management from bringing a lawsuit
against directors for breach of their duty of care, even though such an action,
if successful, might otherwise have benefited OEI and its stockholders. The
Charter and bylaws provide indemnification to OEI's officers and directors and
certain other persons with respect to certain matters, and the Company has
entered into agreements with each of OEI's directors and executive officers
providing for indemnification with respect to certain matters.

     The Charter provides that (i) stockholders may act only at an annual or
special meeting of stockholders and not by written consent and (ii) special
meetings of the stockholders can be called only by the chairman of the board,
the chief executive officer, the president or a majority of the Board of
Directors. The Charter also provides that the Board of Directors shall consist
of three classes of directors serving for staggered terms. It is currently
contemplated that approximately one-third of the Board of Directors will be
elected each year. The classified board provision could prevent a party who
acquires control of a majority of the outstanding voting stock of OEI from
obtaining control of the Board of Directors until the second annual
stockholders' meeting following the date the acquirer obtains the controlling
interest. See "Management -- Directors and Executive Officers." The Charter
provides that the number of directors shall be as determined by the Board of
Directors from time to time, but shall not be less than three. It also provides
that directors may be removed only for cause, and then only by the affirmative
vote of the holders of at least two-thirds of all outstanding voting stock. This
provision, in conjunction with the Charter provisions authorizing the Board of
Directors to fill vacant directorships, will prevent stockholders from removing
incumbent directors without cause and then filling the resulting vacancies with
their own nominees.

STOCKHOLDER PROPOSALS

     OEI's bylaws contain provisions requiring that advance notice be delivered
to OEI of any business to be brought by a stockholder before an annual meeting
of stockholders and establishing certain procedures to be followed by
stockholders in nominating persons for election to the Board of Directors.
Generally, the advance notice provisions provide that written notice must be
given to the secretary of OEI by a stockholder (i) in the event of business to
be brought by a stockholder before an annual meeting and (ii) in the event of
nominations of persons for election to the Board of Directors by any
stockholder, in each case not less than 60 nor more than 180 days prior to the
anniversary date of the immediately preceding annual meeting of stockholders
(with certain exceptions if the date of the annual meeting is different by more
than specified periods from the anniversary date). The stockholder's notice must
set forth specific information regarding the stockholder and his business or
director nominee, as described in OEI's bylaws. The foregoing is a summary of
the material terms and provisions relating to stockholder proposals contained in
OEI's bylaws, which are filed as an exhibit to the Registration Statement of
which this Prospectus is a part.

TRANSFER AGENT AND REGISTRAR

     The transfer agent and registrar for the Common Stock is American Stock
Transfer & Trust Company, 40 Wall Street, New York, New York 10005.

                                       57
<PAGE>
                                  UNDERWRITING

     Upon the terms and subject to the conditions stated in the Underwriting
Agreement, each of the Underwriters named below has severally agreed to purchase
from OEI, and OEI has agreed to sell to such Underwriter, the number of shares
of Common Stock set forth opposite the name of such Underwriter.

                                             NUMBER
              UNDERWRITER                  OF SHARES
- ----------------------------------------  ------------
Smith Barney Inc........................
CIBC Oppenheimer Corp...................
Sanders Morris Mundy Inc................

                                          ------------
          Total.........................     4,300,000
                                          ============

     The Underwriting Agreement provides that the obligations of the several
Underwriters to pay for and accept delivery of the shares of Common Stock are
subject to approval of certain legal matters by their counsel and to certain
other conditions. The Underwriters are obligated to take and pay for all shares
of Common Stock offered hereby (other than those covered by the over-allotment
option described below) if any such shares are taken.

     The Underwriters, for whom Smith Barney Inc., CIBC Oppenheimer Corp. and
Sanders Morris Mundy Inc. are acting as representatives (the
"Representatives"), propose to offer part of the shares of Common Stock
directly to the public at the offering price set forth on the cover page of this
Prospectus and part of the shares to certain dealers at a price which represents
a concession not in excess of $     per share under the public offering price.
The Underwriters may allow, and such dealers may reallow, a concession not in
excess of $     per share to certain other dealers. After the initial offering
of the shares to the public, the public offering price and such concessions may
be changed by the Representatives. The Representatives of the Underwriters have
advised the OEI that the Underwriters do not intend to confirm any shares to any
accounts over which they exercise discretionary authority.

     OEI has granted to the Underwriters an option, exercisable for 30 days from
the date of this Prospectus, to purchase up to an additional 645,000 shares of
Common Stock at the price to the public set forth on the cover page of this
Prospectus, minus the underwriting discounts and commissions. The Underwriters
may exercise such option solely for the purpose of covering over-allotments, if
any, in connection with the Offering. To the extent such option is exercised,
each Underwriter will be obligated, subject to certain conditions, to purchase
approximately the same percentage of such additional shares as the number of
shares set forth opposite each Underwriter's name in the preceding table bears
to the total number of shares listed in such table.

     OEI's officers or directors when the Offering closes, its current
stockholders (including Equus II) and all persons who acquire shares of Common
Stock and receive Replacement Options and Replacement Warrants in the Pending
Acquisitions who, immediately following the Offering, collectively will
beneficially own an aggregate of at least 8,661,457 shares of Common Stock
(including shares issuable upon the exercise of outstanding options and warrants
exercisable within 60 days of the closing of the Offering), have agreed that for
a period of one year after the date of this Prospectus they will not, without
the prior written consent of Smith Barney Inc., directly or indirectly sell,
offer to sell, solicit an offer to buy, contract to sell, grant any option to
purchase or otherwise transfer or dispose of any shares of Common Stock, options
or warrants to acquire shares of Common Stock, or any securities exchangeable or
exercisable for or convertible into shares of Common Stock, except that persons
(other than stockholders of OEI on the consummation of the Pending Acquisitions,
officers or directors of OEI or beneficial owners of 5% of the Common Stock) are
not subject to these restrictions with respect to shares of Common Stock

                                       58
<PAGE>
acquired on the exercise of employee stock options.. OEI has also agreed not to
directly or indirectly sell, offer to sell, solicit an offer to buy, contract to
sell, grant any option to purchase or otherwise transfer or dispose, or announce
the offering of, or file any registration statement under the Securities Act in
respect of, any shares of Common Stock, options or warrants to acquire shares of
the Common Stock or securities exchangeable or exercisable for or convertible
into shares of Common Stock, for a period of two years after the date of this
Prospectus without the prior written consent of Smith Barney Inc., except (i)
shares of Common Stock issued in connection with the Pending Acquisitions, (ii)
shares of Common Stock issued on the exercise of Options awarded under the
Incentive Plan, the Employee Purchase Plan or the Replacement Warrants, (iii)
additional Options awarded under the Incentive Plan and (iv) shares of Common
Stock issued in connection with future acquisitions (but not greater than an
aggregate of 3,000,000 shares during the lock-up period), so long as, (a) in the
case of issuances described in the preceding clauses (ii) and (iii), the
recipient agrees to remain subject to the lock-up until the end of the one-year
period (or, if the recipient is an employee of the Company but is neither an
officer or director of OEI nor the holder of 5% or more of the outstanding
shares of Common Stock, until the lapse of the first 180 days of the one-year
period) and (b) in the case of issuances described in the preceding clause (iv),
the recipient agrees to remain subject to a negotiated lock-up period.

     Prior to the Offering, there has not been any public market for the Common
Stock of the Company. Consequently, the initial public offering price for the
shares of Common Stock included in the Offering has been determined by
negotiations between the Company and the Representatives. Among the factors
considered in determining such price are the history of and prospects for the
Company's business and the industry in which it competes, an assessment of the
Company's management and the present state of the Company's development, the pro
forma combined revenues and earnings of the Company, the historical revenues and
earnings of Petrocon and the Acquired Companies, the prospects for the growth of
the Company's revenues and earnings, the current state of the economy in the
United States and the current level of economic activity in the industry in
which the Company competes and in related or comparable industries, and
currently prevailing conditions in the securities in the securities markets,
including current market valuations of publicly traded companies that are
comparable to the Company.

     The Company has agreed to indemnify the Underwriters and certain related
persons against certain liabilities, including liabilities under the Securities
Act, or to contribute to payments that the Underwriters may be required to make
in respect thereof.

     The Representatives have advised the Company that, pursuant to Regulation M
under the Exchange Act, certain persons participating in the Offering may engage
in transactions, including stabilizing bids, syndicate covering transactions or
the imposition of penalty bids, which may have the effect of stabilizing or
maintaining the market price of the Common Stock at a level above that which
might otherwise prevail in the open market. A "stabilizing bid" is a bid for
or the purchase of the Common Stock on behalf of the Underwriters for the
purpose of fixing or maintaining the price of the Common Stock. A "syndicate
covering transaction" is the bid for or the purchase of the Common Stock on
behalf of the Underwriters to reduce a short position incurred by the
Underwriters in connection with the Offering. A "penalty bid" is an
arrangement permitting the Representatives to reclaim the selling concession
otherwise accruing to an Underwriter or syndicate member in connection with the
Offering if the Common Stock originally sold by such Underwriter or syndicate
member is purchased by the Representatives in a syndicate covering transaction,
and has therefore not been effectively placed by such Underwriter or syndicate
member. The Representatives have advised the Company that such transactions may
be effected on The New York Stock Exchange or otherwise and, if commenced, may
be discontinued at any time.

                                 LEGAL MATTERS

     Certain legal matters in connection with the sale of the Common Stock
offered hereby are being passed upon for OEI by Porter & Hedges, L.L.P.,
Houston, Texas, and for the Underwriters by Morgan, Lewis & Bockius LLP, New
York, New York.

                                       59
<PAGE>
                                    EXPERTS

     The audited financial statements of OEI, Petrocon, each of the Acquired
Companies and PAL included in this Prospectus and elsewhere in the registration
statement have been audited by Arthur Andersen LLP and Arthur Andersen & Co.,
independent public accountants, as indicated in their reports with respect
thereto, and are included herein in reliance upon the authority of said firm as
experts in giving said reports.

                             ADDITIONAL INFORMATION

     OEI has not previously been subject to the reporting requirements of the
Exchange Act. OEI has filed a Registration Statement on Form S-1 (the
"Registration Statement") under the Securities Act with the SEC with respect
to the Offering. This Prospectus, filed as a part of the Registration Statement,
does not contain all of the information set forth in the Registration Statement,
or the exhibits thereto, in accordance with the rules and regulations of the
SEC, and reference is hereby made to such omitted information. The statements
made in this Prospectus concerning documents filed as exhibits to the
Registration Statement accurately describe the material provisions of such
documents and are qualified in their entirety by reference to such exhibits for
complete statements of their provisions. The Registration Statement and the
exhibits thereto may be inspected, without charge, at the public reference
facilities of the SEC at its principal office at Judiciary Plaza, 450 Fifth
Street, N.W., Room 1024, Washington, D.C. 20549, and its regional offices at
Citicorp Center, 500 West Madison Street, Suite 1400, Chicago, Illinois 60661,
and at 7 World Trade Center, 13th Floor, New York, New York 10048. Copies of all
or any portion of the Registration Statement can be obtained at prescribed rates
from the Public Reference Section of the SEC at its principal office at
Judiciary Plaza, 450 Fifth Street, N.W., Room 1024, Washington, D.C. 20549. The
SEC maintains a World Wide Web site that contains reports, proxy and information
statements and other information regarding issuers that file electronically with
the SEC. The address of that site is http://www.sec.gov.

                                       60
<PAGE>
                         INDEX TO FINANCIAL STATEMENTS

                                                                           PAGE
                                                                           ----
Unaudited Pro Forma Combined Financial Statements
     Basis of Presentation ............................................     F-2
     Unaudited Pro forma Combined Balance Sheet .......................     F-3
     Unaudited Pro Forma Combined Statements of Operations ............     F-4
     Notes to Unaudited Pro Forma Combined Financial Statements .......     F-6
Historical Financial Statements
     OEI International, Inc. ..........................................
          Report of Independent Public Accountants ....................     F-11
          Balance Sheet ...............................................     F-12
          Statement of Loss ...........................................     F-13
          Statement of Stockholders' Equity ...........................     F-14
          Statement of Cash Flows .....................................     F-15
          Notes to Financial Statements ...............................     F-16
     Petrocon Engineering, Inc. and Subsidiaries
          Report of Independent Public Accountants ....................     F-19
          Consolidated Balance Sheets .................................     F-20
          Consolidated Statements of Income ...........................     F-22
          Consolidated Statements of Stockholders' Equity .............     F-23
          Consolidated Statements of Cash Flows .......................     F-24
          Notes to Consolidated Financial Statements ..................     F-26
     Petrocon Arabia Limited
          Report of Independent Public
          Accountants .................................................     F-39
          Balance Sheets ..............................................     F-40
          Statements of Income ........................................     F-41
          Statements of Partners' Equity ..............................     F-42
          Statements of Cash Flows ....................................     F-43
          Notes to Financial Statements ...............................     F-44
     Paulus, Sokolowski and Sartor, Inc. ..............................
          Report of Independent Public Accountants ....................     F-48
          Balance Sheets ..............................................     F-49
          Statements of Income ........................................     F-50
          Statements of Shareholders' Equity ..........................     F-51
          Statements of Cash Flows ....................................     F-52
          Notes to Consolidated Financial Statements ..................     F-54
     Gulsby Engineering, Inc. and Subsidiary
          Report of Independent Public Accountants ....................     F-62
          Balance Sheets ..............................................     F-63
          Statements of Income ........................................     F-64
          Statements of Stockholders' Equity ..........................     F-65
          Statements of Cash Flows ....................................     F-66
          Notes to Financial Statements ...............................     F-67
     W-Industries, Inc. ...............................................
          Report of Independent Public Accountants ....................     F-72
          Balance Sheets ..............................................     F-73
          Statements of Income ........................................     F-74
          Statements of Stockholders' Equity ..........................     F-75
          Statements of Cash Flows ....................................     F-76
          Notes to Financial Statements ...............................     F-77

                                      F-1
<PAGE>
                                                                           PAGE
                                                                           ----
Chemical & Industrial Engineering, Inc. ..........................
     Report of Independent Public Accountants ....................          F-81
     Balance Sheets ..............................................          F-82
     Statements of Income ........................................          F-83
     Statements of Stockholders' Equity ..........................          F-84
     Statements of Cash Flows ....................................          F-85
     Notes to Financial Statements ...............................          F-86

                                     F-1(a)
<PAGE>
               UNAUDITED PRO FORMA COMBINED FINANCIAL STATEMENTS
                             BASIS OF PRESENTATION

     The following unaudited pro forma combined financial statements give effect
to (i) the acquisitions by OEI International, Inc. (OEI), of the outstanding
capital stock of Petrocon Engineering, Inc. and Subsidiaries (Petrocon), Paulus,
Sokolowski and Sartor Inc. (PS&S), Gulsby Engineering, Inc. and Subsidiary
(GEI), W-Industries, Inc. (W-I) and Chemical & Industrial Engineering, Inc.
(C&I) (together, the Pending Acquisitions), and related transactions and (ii)
the Offering. The Pending Acquisitions will occur simultaneously with the
closing of OEI's initial public offering (the Offering) and will be accounted
for using the purchase method of accounting. Petrocon has been identified as the
accounting acquirer for financial statement presentation purposes as its
stockholders will represent the largest voting interest within OEI.

     The unaudited pro forma combined balance sheet gives effect to the Pending
Acquisitions and related transactions, and the Offering, as if they had occurred
on March 31, 1998. The unaudited pro forma combined statements of operations
give effect to these transactions as if they had occurred on January 1, 1997.

     OEI has preliminarily analyzed the savings expected to be realized from
reductions in salaries, bonuses and certain benefits to the owners and other
known cost eliminations. To the extent the owners of Petrocon and the Acquired
Companies have contractually agreed to prospective reductions in salary,
bonuses, benefits and lease payments, these reductions and other known cost
eliminations have been reflected in the unaudited pro forma combined statements
of operations. With respect to other potential cost savings, OEI has not and
cannot quantify these savings until completion of the Pending Acquisitions. It
is anticipated that these savings will be offset by costs related to OEI's new
corporate management and by the costs associated with being a public company.
However, because these costs cannot be accurately quantified at this time, they
have not been included in the pro forma financial information of OEI.

     The pro forma adjustments are based on preliminary estimates, available
information and certain assumptions that Company management deems appropriate
and may be revised as additional information becomes available. However,
management does not expect the final purchase price allocation to be materially
different from the preliminary allocation nor does it expect there to be any
material post closing adjustments. The pro forma financial data do not purport
to represent what OEI's financial position or results of operations would
actually have been if such transactions in fact had occurred on those dates and
are not necessarily representative of OEI's financial position or results of
operations for any future period. Since Petrocon and the Acquired Companies were
not under common control or management, historical combined results may not be
comparable to, or indicative of, future performance. The unaudited pro forma
combined financial statements should be read in conjunction with the other
financial statements and notes thereto included elsewhere in this Prospectus.
See also "Risk Factors" included elsewhere herein.

                                      F-2
<PAGE>
                            OEI INTERNATIONAL, INC.
                   UNAUDITED PRO FORMA COMBINED BALANCE SHEET
                                 MARCH 31, 1998
                             (AMOUNTS IN THOUSANDS)
   
<TABLE>
<CAPTION>
                                                                                                          PRO FORMA       PRO FORMA 
                                       PETROCON      PS&S        GEI       W-I        C&I       OEI      ADJUSTMENTS      COMBINED
                                       ---------   ---------   -------    ------   ---------   ------    ------------    ----------
<S>                                     <C>        <C>         <C>        <C>      <C>         <C>         <C>            <C>     
               ASSETS
Cash and equivalents.................   $   657    $     122   $   508    $   86   $     224   $    1      $ --           $  1,598
Trade receivables....................    16,203        5,897       870     3,347       1,761     --          --             28,078
Other receivables....................     --          --            27      --        --         --          --                 27
Advances to stockholder..............     --          --         3,096      --        --         --          (3,096)        --
Current portion of note receivable...        13       --         --         --        --         --          --                 13
Inventory............................     --          --         --          186      --         --          --                186
WIP..................................     --          --         --         --        --         --          --             --
Costs and estimated profits in excess
  of billings on uncompleted
  contracts..........................     3,302        3,409     4,684     4,092         191     --          (3,726)        11,952
Prepaid expenses and other...........     1,194          329       140       114         118      756        --              2,651
Deferred tax asset...................       600       --         --         --           176     --          --                776
                                       ---------   ---------   -------    ------   ---------   ------    ------------    ----------
    Total current assets.............    21,969        9,757     9,325     7,825       2,470      757        (6,822)        45,281
Property and equipment, net..........     6,662          590       524     1,099       1,171     --             371         10,417
Investment in Petrocon Arabia, LTD...     3,775       --         --         --        --         --          --              3,775
Note receivable, net of current
  portion............................        50       --         --         --        --         --          --                 50
Deferred tax asset...................     --              55     1,074      --        --         --          --              1,129
Goodwill.............................     9,239       --         --         --        --         --          64,215         73,454
Other assets.........................     1,169        2,358         3      --            29     --          (1,820)         1,739
                                       ---------   ---------   -------    ------   ---------   ------    ------------    ----------
    Total assets.....................   $42,864    $  12,760   $10,926    $8,924   $   3,670   $  757      $ 55,944       $135,845
                                       =========   =========   =======    ======   =========   ======    ============    ==========
LIABILITIES AND STOCKHOLDERS' EQUITY
Accounts payable.....................   $ 3,259    $   1,175   $   302    $1,908   $     312   $ --        $ --           $  6,956
Accrued compensation and benefits....     6,888        1,098        31       213         648     --          --              8,878
Accrued liabilities..................     --          --            73        44          47    1,024        --              1,188
Short-term debt......................    12,435        2,590     4,636     3,689         115     --          28,182         51,647
Current maturities of long-term
  debt...............................     1,760           63     --           70      --         --          --              1,893
Billings in excess of costs and
  estimated profits on uncompleted
  contracts..........................       323       --           418       206         266     --          --              1,213
Income taxes payable.................       710       --         1,900      --            69     --          --              2,679
Deferred tax liability...............     --             737     --         --        --         --           2,353          3,090
Other liabilities....................       204           89     --         --        --         --          --                293
                                       ---------   ---------   -------    ------   ---------   ------    ------------    ----------
    Total current liabilities........    25,579        5,752     7,360     6,130       1,457    1,024        30,535         77,837
Long-term debt, net of current
  portion............................     2,240          555     --          555      --         --          --              3,350
Deferred tax liability...............       407       --         --         --        --         --          --                407
                                       ---------   ---------   -------    ------   ---------   ------    ------------    ----------
    Total liabilities................    28,226        6,307     7,360     6,685       1,457    1,024        30,535         81,594
Stockholders' equity:
  Common stock.......................     1,531          437        10        12         576        2        (2,560)             8
  Additional paid-in capital.........     7,518       --         --            8      --          461        40,667         48,654
  Note receivable -- capital stock...     --            (379)    --         --        --         --             379         --
  Retained earnings..................     5,589        6,395     3,556     2,219       1,637     (730)      (13,077)         5,589
                                       ---------   ---------   -------    ------   ---------   ------    ------------    ----------
    Total stockholders' equity.......    14,638        6,453     3,566     2,239       2,213     (267)       25,409         54,251
                                       ---------   ---------   -------    ------   ---------   ------    ------------    ----------
    Total liabilities and
      stockholders' equity...........   $42,864    $  12,760   $10,926    $8,924   $   3,670   $  757      $ 55,944       $135,845
                                       =========   =========   =======    ======   =========   ======    ============    ==========
</TABLE>
                                       POST MERGER        AS
                                       ADJUSTMENTS     ADJUSTED
                                       ------------    --------
               ASSETS
Cash and equivalents.................    $  1,928      $ 3,526
Trade receivables....................      --           28,078
Other receivables....................      --               27
Advances to stockholder..............      --            --
Current portion of note receivable...      --               13
Inventory............................      --              186
WIP..................................      --            --
Costs and estimated profits in excess
  of billings on uncompleted
  contracts..........................      --           11,952
Prepaid expenses and other...........        (756)       1,895
Deferred tax asset...................      --              776
                                       ------------    --------
    Total current assets.............       1,172       46,453
Property and equipment, net..........      --           10,417
Investment in Petrocon Arabia, LTD...      --            3,775
Note receivable, net of current
  portion............................      --               50
Deferred tax asset...................      --            1,129
Goodwill.............................      --           73,454
Other assets.........................      --            1,739
                                       ------------    --------
    Total assets.....................    $  1,172      $137,017
                                       ============    ========
LIABILITIES AND STOCKHOLDERS' EQUITY
Accounts payable.....................    $ --          $ 6,956
Accrued compensation and benefits....      --            8,878
Accrued liabilities..................        (756)         432
Short-term debt......................     (45,815)       5,832
Current maturities of long-term
  debt...............................      (1,893)       --
Billings in excess of costs and
  estimated profits on uncompleted
  contracts..........................      --            1,213
Income taxes payable.................      --            2,679
Deferred tax liability...............      --            3,090
Other liabilities....................      --              293
                                       ------------    --------
    Total current liabilities........     (48,464)      29,373
Long-term debt, net of current
  portion............................      (3,350)       --
Deferred tax liability...............      --              407
                                       ------------    --------
    Total liabilities................     (51,814)      29,780
Stockholders' equity:
  Common stock.......................           4           12
  Additional paid-in capital.........      52,982      101,636
  Note receivable -- capital stock...      --            --
  Retained earnings..................      --            5,589
                                       ------------    --------
    Total stockholders' equity.......      52,986      107,237
                                       ------------    --------
    Total liabilities and
      stockholders' equity...........    $  1,172      $137,017
                                       ============    ========
    
  See accompanying notes to unaudited pro forma combined financial statements.

                                      F-3
<PAGE>
                            OEI INTERNATIONAL, INC.
             UNAUDITED PRO FORMA COMBINED STATEMENTS OF OPERATIONS
                          YEAR ENDED DECEMBER 31, 1997
                (IN THOUSANDS, EXCEPT SHARE AND PER SHARE DATA)
   
<TABLE>
<CAPTION>
                                                                                                            PRO FORMA
                                        PETROCON     PS&S        GEI        W-I        C&I        OEI      ADJUSTMENTS
                                        --------   ---------  ---------  ---------  ---------  ---------   ------------
<S>                                     <C>        <C>        <C>        <C>        <C>        <C>           <C> 
REVENUES.............................   $92,616    $  21,675  $  18,264  $  20,604  $  15,906  $  --         $ --
DIRECT COSTS.........................    71,693        9,731     11,768     13,700     10,969     --           --
                                        --------   ---------  ---------  ---------  ---------  ---------   ------------
    Gross profit.....................    20,923       11,944      6,496      6,904      4,937     --           --
GENERAL AND
  ADMINISTRATIVE EXPENSES............    15,062       10,787        927      3,003      3,997          1       (2,873)
GOODWILL AMORTIZATION................       254       --         --         --         --         --            1,604
                                        --------   ---------  ---------  ---------  ---------  ---------   ------------
Income from operations...............     5,607        1,157      5,569      3,901        940         (1)       1,269
OTHER INCOME (EXPENSE):
    Interest income (expense), net...    (1,569)        (208)      (233)      (247)        36     --            1,775
    Equity in earnings of
      affiliates.....................       860       --         --         --         --         --           --
    Abandonment/Loss on impairment of
      assets.........................      (364)      --         --         --         --         --           --
    Other............................      (206)         (75)        57        154         (5)    --           --
                                        --------   ---------  ---------  ---------  ---------  ---------   ------------
Income (loss) from operations before
  income tax.........................     4,328          874      5,393      3,808        971         (1)       3,044
Provision for income tax.............     1,574           97      1,559     --            424     --            4,356
                                        --------   ---------  ---------  ---------  ---------  ---------   ------------
NET INCOME...........................   $ 2,754    $     777  $   3,834  $   3,808  $     547  $      (1)    $ (1,312)
                                        ========   =========  =========  =========  =========  =========   ============
NET INCOME PER SHARE
    Basic............................
    Diluted..........................
SHARES USED IN COMPUTING PRO FORMA
  NET INCOME PER SHARE
    Basic............................
    Diluted..........................
</TABLE>
                                       PRO FORMA
                                        COMBINED
                                       ----------
REVENUES.............................  $  169,065
DIRECT COSTS.........................     117,861
                                       ----------
    Gross profit.....................      51,204
GENERAL AND
  ADMINISTRATIVE EXPENSES............      30,903
GOODWILL AMORTIZATION................       1,858
                                       ----------
Income from operations...............      18,443
OTHER INCOME (EXPENSE):
    Interest income (expense), net...        (446)
    Equity in earnings of
      affiliates.....................         860
    Abandonment/Loss on impairment of
      assets.........................        (364)
    Other............................         (75)
                                       ----------
Income (loss) from operations before
  income tax.........................      18,418
Provision for income tax.............       8,010
                                       ----------
NET INCOME...........................  $   10,408
                                       ==========
NET INCOME PER SHARE
    Basic............................  $      .88
                                       ==========
    Diluted..........................  $      .85
                                       ==========
SHARES USED IN COMPUTING PRO FORMA
  NET INCOME PER SHARE
    Basic............................  11,835,494
                                       ==========
    Diluted..........................  12,299,454
                                       ==========
    
  See accompanying notes to unaudited pro forma combined financial statements.

                                      F-4
<PAGE>
                            OEI INTERNATIONAL, INC.
             UNAUDITED PRO FORMA COMBINED STATEMENTS OF OPERATIONS
                       THREE MONTHS ENDED MARCH 31, 1998
                (IN THOUSANDS, EXCEPT SHARE AND PER SHARE DATA)
   
<TABLE>
<CAPTION>
                                                                                                            PRO FORMA
                                        PETROCON     PS&S        GEI        W-I        C&I        OEI      ADJUSTMENTS
                                        --------   ---------  ---------  ---------  ---------  ---------   ------------
<S>                                     <C>        <C>        <C>        <C>        <C>        <C>            <C>
REVENUES.............................   $25,915    $   5,899  $   1,524  $   6,695  $   2,151  $  --          $--
DIRECT COSTS.........................    20,521        2,469      1,188      4,330      1,493     --          --
                                        --------   ---------  ---------  ---------  ---------  ---------   ------------
    Gross profit.....................     5,394        3,430        336      2,365        658     --          --
GENERAL AND
  ADMINISTRATIVE EXPENSES............     3,689        2,655        184        691      1,088        729        (500)
GOODWILL AMORTIZATION................       103       --         --         --         --         --             401
                                        --------   ---------  ---------  ---------  ---------  ---------   ------------
Income from operations...............     1,602          775        152      1,674       (430)      (729)         99
OTHER INCOME (EXPENSE):
    Interest income (expense), net...      (386)         (59)       (94)      (107)         4     --             446
    Equity in earnings of
      affiliates.....................       (42)      --         --         --         --         --          --
    Abandonment/Loss on impairment of
      assets.........................     --          --         --         --         --         --          --
    Other............................       (23)      --         --             20         (6)    --          --
                                        --------   ---------  ---------  ---------  ---------  ---------   ------------
Income (loss) from operations before
  income tax.........................     1,151          716         58      1,587       (432)      (729)        545
Provision for income tax.............       479           69         18     --           (165)    --             918
                                        --------   ---------  ---------  ---------  ---------  ---------   ------------
NET INCOME...........................   $   672    $     647  $      40  $   1,587  $    (267) $    (729)     $ (373)
                                        ========   =========  =========  =========  =========  =========   ============
NET INCOME PER SHARE
    Basic............................
    Diluted..........................
SHARES USED IN COMPUTING PRO FORMA
  NET INCOME PER SHARE
    Basic............................
    Diluted..........................
</TABLE>
                                       PRO FORMA
                                        COMBINED
                                       ----------
REVENUES.............................  $   42,184
DIRECT COSTS.........................      30,001
                                       ----------
    Gross profit.....................      12,183
GENERAL AND
  ADMINISTRATIVE EXPENSES............       8,536
GOODWILL AMORTIZATION................         504
                                       ----------
Income from operations...............       3,143
OTHER INCOME (EXPENSE):
    Interest income (expense), net...        (196)
    Equity in earnings of
      affiliates.....................         (42)
    Abandonment/Loss on impairment of
      assets.........................      --
    Other............................          (9)
                                       ----------
Income (loss) from operations before
  income tax.........................       2,896
Provision for income tax.............       1,319
                                       ----------
NET INCOME...........................  $    1,577
                                       ==========
NET INCOME PER SHARE
    Basic............................  $      .13
                                       ==========
    Diluted..........................  $      .13
                                       ==========
SHARES USED IN COMPUTING PRO FORMA
  NET INCOME PER SHARE
    Basic............................  11,835,494
                                       ==========
    Diluted..........................  12,299,454
                                       ==========
    
  See accompanying notes to unaudited pro forma combined financial statements.

                                      F-5
<PAGE>
        OEI INTERNATIONAL, INC. AND PETROCON AND THE ACQUIRED COMPANIES
           NOTES TO UNAUDITED PRO FORMA COMBINED FINANCIAL STATEMENTS

1.  GENERAL:

     The Company is a diversified engineering company providing engineering
services and engineered systems to a broad range of industrial, commercial and
institutional clients throughout the United States and internationally. The
Company's multidisciplined expertise enables it to offer its clients total
design and engineering solutions extending from project inception through
completion, start-up and operation, within multiple industries and across
diverse geographic markets. OEI has conducted no operations to date and will
acquire Petrocon and the Acquired Companies concurrently with and as a condition
of the closing of this Offering.

     The historical financial statements reflect the financial position and
results of operations of Petrocon and the Acquired Companies' and were derived
from Petrocon and the Acquired Companies' respective financial statements where
indicated. The periods included in these financial statements for Petrocon and
the Acquired Companies are as of and for the three months ended March 31, 1998
and for the year ended December 31, 1997. The audited historical financial
statements included elsewhere in this Prospectus have been included in
accordance with Securities and Exchange Commission (SEC) Regulation S-X. I. Rule
3-05.

2.  ACQUISITION OF PETROCON AND THE ACQUIRED COMPANIES:

     Concurrently with and as a condition to the closing of the Offering, OEI
will acquire all of the outstanding capital stock of Petrocon and Acquired
Companies. The acquisitions will be accounted for using the purchase method of
accounting with Petrocon being reflected as the accounting acquiror as its
stockholders will represent the largest voting interest within OEI.

     The following table sets forth the consideration to be paid (a) in cash and
(b) in shares of Common Stock to the common stockholders of Petrocon and
Acquired Companies. For purposes of computing the estimated purchase price for
accounting purposes, the value of the shares was determined using an estimated
fair value of $12.60 per share, which is less than the initial public offering
price of $14.00 per share (the midpoint of the estimated offering price range)
due primarily to restrictions on the sale and transferability of the shares
issued. The total estimated purchase price of $91.5 million for the acquisitions
is based upon preliminary estimates and is subject to certain purchase price
adjustments at and following closing.

                                                    SHARES OF
                                         CASH      COMMON STOCK
                                       ---------   ------------
                                            (IN THOUSANDS)
Petrocon.............................  $  12,716       2,119
PS&S.................................      4,522         879
GEI..................................      2,786         542
W-I..................................      4,902         953
C&I..................................      2,880         560
                                       ---------   ------------
          Total......................  $  27,806       5,053
                                       =========   ============

     The GEI consideration set forth above does not include approximately $3.4
million in cash and 654,099 shares of Common Stock, which will be placed in
escrow in connection with the acquisition. These amounts will be held for
subsequent distribution to the former GEI stockholders, or returned to the
Company, depending on the future financial performance of GEI. The earnout
payments, if any, will be accounted for as additional goodwill and amortized
over the applicable amortization period.
   
     Upon consummation of the Pending Acquisitions, the Company will record on
its balance sheet $64.2 million of goodwill, $46.5 million of which represents
the excess of the purchase price for the Acquired Companies over the fair value
of the net assets to be acquired. At the same time, the Company will also record
a non-recurring, non-cash compensation charge of $7.7 million related to an
aggregate of 609,395
    
                                      F-6
<PAGE>
   
shares of Common Stock owned by management, which shares were sold by OEI to
them in October 1997 and March 1998. Neither the goodwill amortization nor the
compensation charge will be deductible for federal income tax purposes. The
issuances of the management shares were made in contemplation of the Offering
and the Pending Acquisitions, and no further issuances of this nature are
anticipated.
    
3.  UNAUDITED PRO FORMA COMBINED BALANCE SHEET ADJUSTMENTS:
   
     (a)  Records the liability for the cash portion of the consideration to be
          paid to the stockholders of Petrocon and the Acquired Companies in
          connection with the Pending Acquisitions. The recording of the payment
          of the cash portion of the consideration to such stockholders has been
          included in the purchase price set forth in adjustment (c) below.
    
     (b)  Records the distribution of contract retainages, advances to
          stockholder and other personal assets to stockholders.
   
     (c)  Records the issuance of 2,934,139 shares of Common Stock valued at
          $12.60 per share (or $37.0 million) in connection with the purchase of
          the Acquired Companies by OEI for a total estimated purchase price of
          $52.1 million (including cash consideration of $15.1 million)
          resulting in goodwill of $46.5 million after allocating the purchase
          price to the aggregate assets acquired and liabilities assumed, as
          shown below. In addition, goodwill of $15.3 million has been recorded
          attributable to the 1.2 million shares of Common Stock issued to Equus
          II Incorporated, OEI's initial financing source and goodwill of $2.4
          million has been recorded attributable to additional deferred tax
          liabilities associated with the Pending Acquisitons. See Note 2.
    
               ASSETS
Cash and equivalents.................  $     941
Accounts receivable..................     11,902
Inventories..........................        186
Costs and estimated profits in excess
  of billings on uncompleted
  contracts..........................      8,650
Prepaid expenses and other...........      1,457
Deferred tax asset...................        176
                                       ---------
     Total current asssets...........     23,312
Property and equipment, net..........      3,384
Deferred tax asset...................      1,129
Other assets.........................        638
                                       ---------
     Total assets....................  $  28,463
                                       =========
             LIABILITIES
Accounts payable and accrued
  liabilities........................  $   4,885
Accrued compensation and benefits....      1,990
Short-term debt......................     11,102
Current maturities of long-term
  debt...............................        133
Billings in excess of costs and
  estimated profits on uncompleted
  contracts..........................        890
Income taxes payable.................      1,969
Deferred income taxes................        737
Other liabilities....................         89
                                       ---------
     Total current liabilities.......     21,795
                                       ---------
Long-term obligation, net of current
  maturities.........................      1,110
                                       ---------
     Total liabilities...............  $  22,905
                                       =========

(d)  Records the contribution of assets to OEI.

(e)  Records the cash proceeds of $60.2 million from the issuance of shares of
     OEI Common Stock net of estimated offering costs of $7.2 million (based on
     an initial public offering price of $14.00 per share

                                      F-7
<PAGE>
   
     and includes the payment of deferred offering costs of $0.9 million
     incurred through March 31, 1998). Offering costs primarily consist of
     underwriting discounts and commissions, accounting fees, legal fees and
     printing expenses.
    
(f)  Records the cash portion of the consideration to be paid to the
     stockholders of Petrocon and the Acquired Companies in connection with the
     Pending Acquisitions.

(g)  Records the repayment of certain liabilities and debt obligations with the
     net proceeds from the Offering and from cash on hand, including $3.6
     million of notes payable to stockholders or related parties of Petrocon and
     the Acquired Companies, all of which was current at March 31, 1998, and
     $3.5 million attributable to an accrued legal judgment.

     The following table summarizes unaudited pro forma balance sheet
adjustments (in thousands):
   
<TABLE>
<CAPTION>
                                                                                       PRO FORMA
                                          (A)         (B)        (C)         (D)      ADJUSTMENTS
                                       ----------  ---------  ----------  ---------   ------------
<S>                                    <C>         <C>        <C>         <C>           <C>      
               ASSETS
Advances to stockholder..............  $   --      $  (3,096) $   --      $  --         $ (3,096)
Costs and estimated profits in excess
  of billings on uncompleted
  contracts..........................      --         (3,726)     --         --           (3,726)
                                       ----------  ---------  ----------  ---------   ------------
     Total current asssets...........      --         (6,822)     --         --           (6,822)
Property and equipment, net..........      --         --          --            371          371
Goodwill.............................      --         --          64,215     --           64,215
Other assets.........................      --         (1,753)     --            (67)      (1,820)
                                       ----------  ---------  ----------  ---------   ------------
Total assets.........................  $   --      $  (8,575) $   64,215  $     304     $ 55,944
                                       ==========  =========  ==========  =========   ============
LIABILITIES AND STOCKHOLDERS' EQUITY
Short-term debt......................  $   27,806  $      72  $   --      $     304     $ 28,182
Deferred tax liability...............      --         --           2,353     --            2,353
                                       ----------  ---------  ----------  ---------   ------------
     Total current liabilities.......      27,806         72       2,353        304       30,535
                                       ----------  ---------  ----------  ---------   ------------
     Total liabilities...............      27,806         72       2,353        304       30,535
Stockholders' equity
     Common stock....................      --         --          (2,560)    --           (2,560)
     Additional paid-in capital......     (27,806)    --          68,473                  40,667
     Note receivable -- capital
       stock.........................      --            379      --         --              379
     Retained earnings...............      --         (9,026)     (4,051)    --          (13,077)
                                       ----------  ---------  ----------  ---------   ------------
     Total stockholders' equity......     (27,806)    (8,647)     61,862     --           25,409
                                       ----------  ---------  ----------  ---------   ------------
Total liabilities and stockholders'
  equity.............................  $   --      $  (8,575) $   64,215  $     304     $ 55,944
                                       ==========  =========  ==========  =========   ============
</TABLE>
    
                                      F-8
<PAGE>
<TABLE>
<CAPTION>
                                                                           POST MERGER
                                          (E)        (F)         (G)       ADJUSTMENTS
                                       ---------  ----------  ----------   ------------
               ASSETS
<S>                                    <C>        <C>         <C>            <C>     
Cash and equivalents.................  $  52,986  $  (27,806) $  (23,252)    $  1,928
Deferred costs.......................       (756)     --          --             (756)
                                       ---------  ----------  ----------   ------------
               Total current
                  assets.............     52,230     (27,806)    (23,252)       1,172
                                       ---------  ----------  ----------   ------------
Total assets.........................  $  52,230  $  (27,806) $  (23,252)    $  1,172
                                       =========  ==========  ==========   ============
LIABILITIES AND STOCKHOLDERS' EQUITY
Accrued liabilities..................  $    (756) $   --      $   --         $   (756)
Short-term debt......................     --         (27,806)    (18,009)     (45,815)
Current maturities of long-term
  debt...............................     --          --          (1,893)      (1,893)
                                       ---------  ----------  ----------   ------------
               Total current
                  liabilities........       (756)    (27,806)    (19,902)     (48,464)
Long-term debt, net of current
  portion............................     --          --          (3,350)      (3,350)
                                       ---------  ----------  ----------   ------------
               Total liabilities.....       (756)    (27,806)    (23,252)     (51,814)
Stockholders' equity
     Common stock....................          4      --          --                4
     Additional paid-in capital......     52,982      --          --           52,982
                                       ---------  ----------  ----------   ------------
               Total stockholders'
                  equity.............     52,986      --          --           52,986
                                       ---------  ----------  ----------   ------------
Total liabilities and stockholders'
  equity.............................  $  52,230  $  (27,806) $  (23,252)    $  1,172
                                       =========  ==========  ==========   ============
</TABLE>
4.  UNAUDITED PRO FORMA COMBINED STATEMENTS OF OPERATIONS ADJUSTMENTS:

YEAR ENDED DECEMBER 31, 1997
   
     (a)  Reduces compensation expense to the contractual levels the owners and
          key employees of the Petrocon and the Acquired Companies have agreed
          to receive subsequent to the Pending Acquisitions.
    
     (b)  Records goodwill amortization expense using a 40-year estimated life.

     (c)  Reduces interest expense for repayment of certain debt obligations
          which will be repaid from the net proceeds of the Offering and
          existing cash.

     (d)  Records a reduction of rent expense of $236 net of depreciation of $74
          for property to be acquired in connection with the Pending
          Aquisitions.

     (e)  Reflects the incremental provision for federal and state income taxes
          relating to the other statements of operations adjustments and for
          income taxes on S Corporation income.

     (f)  The number of shares estimated to be outstanding on completion of the
          Offering includes the following (reflects the April 6, 1998 stock
          split) (in thousands):

Issued to management.................        609
Issued to financial sponsor..........      1,219
Issued in the Pending Acquisitions
(including escrowed shares)..........      5,707
Issued in the Offering...............      4,300
                                       ---------
Shares used in computing basic pro
forma income per share...............     11,835
Net effect of OEI stock options and
warrants using the Treasury Stock
method...............................        464
                                       ---------
Shares used in computing fully
diluted pro forma income per share...     12,299
                                       =========

                                      F-9
<PAGE>
          Such share number does not include an aggregate of 937,662 shares
          subject to options granted under OEI's Incentive Plan which have an
          exercise price equal to the initial Offering price per share. See
          "Management -- Incentive Plan."

     The following table summarizes unaudited pro forma combined statements of
operations adjustments (in thousands):
   
<TABLE>
<CAPTION>
                                                                                                PRO FORMA
                                          (A)        (B)        (C)        (D)        (E)      ADJUSTMENTS
                                       ---------  ---------  ---------  ---------  ---------   ------------
<S>                                    <C>        <C>        <C>        <C>        <C>           <C>      
SELLING, GENERAL AND ADMINISTRATIVE
  EXPENSES...........................  $  (2,711) $  --      $  --      $    (162) $  --         $ (2,873)
GOODWILL AMORTIZATION................     --          1,604     --         --         --            1,604
                                       ---------  ---------  ---------  ---------  ---------   ------------
INCOME (LOSS) FROM OPERATIONS........      2,711     (1,604)    --            162     --            1,269
OTHER INCOME (EXPENSE):
    Interest expense.................     --         --          1,775     --         --            1,775
                                       ---------  ---------  ---------  ---------  ---------   ------------
INCOME (LOSS) FROM CONTINUING
  OPERATIONS BEFORE INCOME TAXES.....      2,711     (1,604)     1,775        162     --            3,044
PROVISION FOR INCOME TAXES...........     --         --         --         --          4,356        4,356
                                       ---------  ---------  ---------  ---------  ---------   ------------
NET INCOME (LOSS)....................  $   2,711  $  (1,604) $   1,775  $     162  $  (4,356)    $ (1,312)
                                       =========  =========  =========  =========  =========   ============
</TABLE>
    
THREE MONTHS ENDED MARCH 31, 1998

     (a)  Additionally, reflects the reversal of the $0.5 million non-recurring
          non-cash compensation charge by OEI related to the issuance of 36,564
          shares of Common Stock to management. The historical financial
          statements of OEI include a compensation charge representing the
          differences between the amounts paid for the shares issued to OEI's
          management and their estimated value on the date of the sale as if the
          Pending Acquisitions had occurred.

     (b)  Records goodwill amortization expense using a 40-year estimated life.

     (c)  Reduces interest expense for repayment of certain debt obligations
          which will be repaid from the net proceeds of the Offering and
          existing cash.

     (d)  Records a reduction of rent expense of $59 net of depreciation of $19
          for property to be acquired in connection with the Pending
          Acquisitions.

     (e)  Reflects the incremental provision for federal and state income taxes
          relating to the other statements of operations adjustments and for
          income taxes on S Corporation income.

     The following table summarizes unaudited pro forma combined statements of
operations adjustments (in thousands):
   
<TABLE>
<CAPTION>
                                                                                                PRO FORMA
                                          (A)        (B)        (C)        (D)        (E)      ADJUSTMENTS
                                       ---------  ---------  ---------  ---------  ---------   ------------
<S>                                    <C>        <C>        <C>        <C>        <C>            <C>    
SELLING, GENERAL AND ADMINISTRATIVE
  EXPENSES...........................  $    (460) $  --      $  --      $     (40) $  --          $ (500)
GOODWILL AMORTIZATION................     --            401     --         --         --             401
                                       ---------  ---------  ---------  ---------  ---------   ------------
INCOME (LOSS) FROM OPERATIONS........        460       (401)    --             40     --              99
OTHER INCOME (EXPENSE):
    Interest expense.................     --         --            446     --         --             446
                                       ---------  ---------  ---------  ---------  ---------   ------------
INCOME (LOSS) FROM CONTINUING
  OPERATIONS BEFORE INCOME TAXES.....        460       (401)       446         40     --             545
PROVISION FOR INCOME TAXES...........     --         --         --         --            918         918
                                       ---------  ---------  ---------  ---------  ---------   ------------
NET INCOME (LOSS)....................  $     460  $    (401) $     446  $      40  $    (918)     $ (373)
                                       =========  =========  =========  =========  =========   ============
</TABLE>
    
                                      F-10
<PAGE>
                    REPORT OF INDEPENDENT PUBLIC ACCOUNTANTS

To OEI International, Inc.:

     We have audited the accompanying balance sheet of OEI International, Inc.
(a Delaware corporation), as of December 31, 1997, and the related statement of
loss, stockholders' equity and cash flows from inception (October 9, 1997)
through December 31, 1997. These financial statements are the responsibility of
the Company's management. Our responsibility is to express an opinion on these
financial statements based on our audit.

     We conducted our audit in accordance with generally accepted auditing
standards. Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements are free of material
misstatement. An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements. An audit also includes
assessing the accounting principles used and significant estimates made by
management, as well as evaluating the overall financial statement presentation.
We believe that our audit provides a reasonable basis for our opinion.

     In our opinion, the financial statements referred to above present fairly,
in all material respects, the financial position of OEI International, Inc., as
of December 31, 1997, and the results of its operations and its cash flows from
inception (October 9, 1997) through December 31, 1997, in conformity with
generally accepted accounting principles.

ARTHUR ANDERSEN LLP

Houston, Texas
February 27, 1998

                                      F-11
<PAGE>
                            OEI INTERNATIONAL, INC.
                                 BALANCE SHEET
   
                                        DECEMBER 31,     MARCH 31,
                                            1997            1998
                                        ------------    ------------
                                                        (UNAUDITED)
               ASSETS
CASH.................................    $      893      $       840
DEFERRED OFFERING COSTS..............       112,427          755,681
                                        ------------    ------------
               Total assets..........    $  113,320      $   756,521
                                        ============    ============
LIABILITIES AND STOCKHOLDERS' EQUITY
ACCRUED LIABILITIES AND AMOUNTS DUE
  TO STOCKHOLDER.....................    $  112,427      $ 1,024,050
COMMITMENTS AND CONTINGENCIES
STOCKHOLDERS' EQUITY:
     Preferred stock, $.001 par,
      1,000,000 authorized, none
      issued and outstanding.........       --               --
     Common stock, $.001 par,
      40,000,000 shares authorized,
      1,791,804 and 1,828,368 shares
      outstanding, respectively......         1,792            1,828
     Additional paid-in capital......       --               460,666
     Retained deficit................          (899)        (730,023)
                                        ------------    ------------
               Total stockholders'
                   equity............           893         (267,529)
                                        ------------    ------------
               Total liabilities and
                   stockholders'
                   equity............    $  113,320      $   756,521
                                        ============    ============
    
       Reflects a 1,828.368-for-one stock split effective April 6, 1998.

   The accompanying notes are an integral part of these financial statements.

                                      F-12
<PAGE>
                            OEI INTERNATIONAL, INC.
                               STATEMENT OF LOSS
   
                                           PERIOD FROM
                                            INCEPTION
                                        (OCTOBER 9, 1997)      THREE MONTHS
                                             THROUGH               ENDED
                                        DECEMBER 31, 1997     MARCH 31, 1998
                                        ------------------    ---------------
                                                                (UNAUDITED)
REVENUES.............................        -$-                $  --
GENERAL AND ADMINISTRATIVE
  EXPENSES...........................            899                729,124
                                             -------          ---------------
NET LOSS.............................         $ (899)           $  (729,124)
                                             =======          ===============
    

   The accompanying notes are an integral part of these financial statements.

                                      F-13
<PAGE>
                            OEI INTERNATIONAL, INC.
                       STATEMENT OF STOCKHOLDERS' EQUITY
   
<TABLE>
<CAPTION>
                                           COMMON STOCK        ADDITIONAL                     TOTAL
                                        -------------------     PAID-IN      RETAINED      STOCKHOLDERS'
                                         SHARES      AMOUNT     CAPITAL       DEFICIT         EQUITY
                                        ---------    ------    ----------    ---------     ------------
<S>                                     <C>          <C>        <C>          <C>            <C>         
INITIAL CAPITALIZATION (October 9,
  1997)..............................   1,791,804    $1,792     $  --        $  --          $     1,792
     Net loss........................      --          --          --             (899)            (899)
                                        ---------    ------    ----------    ---------     ------------
BALANCE, December 31, 1997...........   1,791,804     1,792        --             (899)             893
     Issuance of Common Stock
       (unaudited)...................      36,564        36       460,666       --              460,702
     Net loss (unaudited)............      --          --          --         (729,124)        (729,124)
                                        ---------    ------    ----------    ---------     ------------
BALANCE, March 31, 1998
  (unaudited)........................   1,828,368    $1,828     $ 460,666    $(730,023)     $  (267,529)
                                        =========    ======    ==========    =========     ============
</TABLE>
    
   The accompanying notes are an integral part of these financial statements.

                                      F-14
<PAGE>
                            OEI INTERNATIONAL, INC.
                            STATEMENT OF CASH FLOWS
   
                                           PERIOD FROM
                                            INCEPTION
                                        (OCTOBER 9, 1997)     THREE MONTHS
                                             THROUGH              ENDED
                                        DECEMBER 31, 1997    MARCH 31, 1998
                                        -----------------    ---------------
                                                               (UNAUDITED)
CASH FLOWS FROM OPERATING ACTIVITIES:
     Net loss........................       $    (899)          $(729,124)
     Adjustments to reconcile net
       loss to net cash provided by
       (used in) operating
       activities --
     Compensation expense related to
       issuance of management
       shares........................        --                   460,682
     Changes in assets and
       liabilities --
          Increase in deferred
             costs...................        (111,615)           (643,254)
          Increase in accrued
             liabilities and amounts
             due to stockholder......         112,427             911,623
                                        -----------------    ---------------
               Net cash used in
                  operating
                  activities                      (87)                (73)
                                        -----------------    ---------------
CASH FLOWS FROM FINANCING ACTIVITIES:
     Proceeds from the issuance of
       common stock..................             980                  20
                                        -----------------    ---------------
               Net cash provided by
                  financing
                  activities.........             980                  20
                                        -----------------    ---------------
NET INCREASE (DECREASE) IN CASH......             893                 (53)
CASH, beginning of period............        --                       893
                                        -----------------    ---------------
CASH, end of period..................       $     893           $     840
                                        =================    ===============
    
   The accompanying notes are an integral part of these financial statements.

                                      F-15
<PAGE>
                            OEI INTERNATIONAL, INC.
                         NOTES TO FINANCIAL STATEMENTS

1.  SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES:

  BUSINESS ACTIVITY

     OEI International, Inc. (OEI or the Company), a Delaware corporation, was
founded on October 9, 1997. The Company is a diversified engineering company
providing engineering services and engineered systems to a broad range of
industrial, commercial and institutional clients throughout the United States
and internationally. OEI intends to acquire five engineering companies (the
Pending Acquisitions), complete an initial public offering (the Offering) of its
common stock and, subsequent to the Offering, continue to acquire, through
merger or purchase, similar companies to expand its national and international
operations.

     OEI's primary assets at December 31, 1997, are cash and deferred offering
costs. OEI has not conducted any operations, and all activities to date have
related to the Pending Acquisitions and the Offering. Cash of $980 was generated
from the initial capitalization of the Company (see Note 2). There is no
assurance that the Pending Acquisitions discussed below will be completed and
that OEI will be able to generate future operating revenues. Funding for the
deferred offering costs has been provided by Equus II Incorporated (Equus II).
OEI is dependent upon the Offering to fund the amounts due to Equus II, the
Pending Acquisitions and future operations.

  INTERIM FINANCIAL INFORMATION

     The interim financial statements as of March 31, 1998, and for the three
months then ended are unaudited, and certain information and footnote
disclosures, normally included in financial statements prepared in accordance
with generally accepted accounting principles, have been omitted. In the opinion
of management, all adjustments, consisting only of normal recurring adjustments,
necessary to fairly present the financial position, results of operations and
cash flows with respect to the interim financial statements, have been included.
The results of operations for the interim period is not necessarily indicative
of the results for the entire fiscal year.

  INCOME TAX

     The Company follows the liability method of accounting for income taxes in
accordance with Statement of Financial Accounting Standards (SFAS) No. 109.
Under this method, deferred income taxes are recorded based upon the differences
between the financial reporting and tax bases of assets and liabilities and are
measured using the enacted tax rates and laws that will be in effect when the
underlying assets or liabilities are recovered or settled.

  STOCK OPTIONS

     Effective September 4, 1997, the Company adopted SFAS No. 123, "Accounting
for Stock-Based Compensation." This pronouncement allows two methods of
calculating the fair market value of equity instruments issued to employees, in
accordance with Accounting Principles Board (APB) Opinion No. 25 or using an
option-pricing model. The fair market value of equity instruments issued to
employees may be calculated using an option-pricing model such as the
Black-Scholes model that takes into account, as of the grant date, the exercise
price and expected life of the equity instrument, the current price of the
underlying stock, expected dividends on the stock and the risk-free interest
rate for the expected term of the equity instrument. The Company has elected to
calculate compensation expense in accordance with APB No. 25 which calculates
compensation expense as the difference between the employee's exercise price and
the current price of the underlying stock. There were no financial statement
effects from the adoption of this pronouncement.

                                      F-16
<PAGE>
                            OEI INTERNATIONAL, INC.
                  NOTES TO FINANCIAL STATEMENTS -- (CONTINUED)

  FAIR VALUES OF FINANCIAL INSTRUMENTS

     The Company enters into various types of financial instruments in the
normal course of business. The Company does not hold or issue financial
instruments for trading purposes, nor does it hold interest rate, leveraged or
other types of derivative financial instruments. The carrying amounts of the
Company's financial instruments approximate their fair values.

  USE OF ESTIMATES

     The preparation of the Company's financial statements in conformity with
generally accepted accounting principles requires management to make estimates
and assumptions that affect the reported amounts of assets and liabilities and
disclosures of contingent assets and liabilities at the date of the financial
statements and the reported amounts of revenues and expenses during the
reporting period. Actual results could differ from those estimates.

2.  STOCKHOLDERS' EQUITY:
   
     On April 6, 1998, OEI effected a 1,828.368-for-one stock split for each
share of common stock of the Company ("Common Stock") then outstanding. In
addition, the Company increased the number of authorized shares of Common Stock
to 40,000,000 and authorized 1,000,000 shares of $.001 par value preferred
stock. The effects of the Common Stock split and the increase in the shares of
authorized Common Stock have been retroactively reflected on the balance sheet
and in the accompanying notes. In October 1997, in connection with the
organization and initial capitalization of OEI, the Company issued 1,218,973
shares of common stock at $.001 per share to Equus II at an aggregate purchase
price of $666.67 and a total of 572,831 shares of Common Stock to management at
an aggregate purchase price of $313.33. The shares issued to Equus II and
members of management were issued to engage such parties in providing services
related primarily to the Company's public offering activities, including
financial advisory and other consulting services. The fair value of such shares
was based on specific factors related to the Company and the transactions,
including restrictions on transferability and sale of the shares issued.
    
3.  INCENTIVE PLAN:

     In April 1998, the Company's stockholders and Board of Directors approved
the Company's Incentive Plan which provides for the granting of incentive or
nonstatutory stock options, stock appreciation rights, restricted stock,
performance units and performance shares and other stock-based awards
(collectively, "Incentive Awards") to key employees, officers, non-employee
directors and consultants to the Company. Under the Incentive Plan, the Company
may issue Incentive Awards covering at any one time an aggregate of the greater
of (i) 2,000,000 shares of Common Stock and (ii) 10% of the number of shares of
Common Stock issued and outstanding on the last day of the then preceding
calendar quarter. No more than 2,000,000 shares of Common Stock will be
available for incentive stock options.

4.  EMPLOYEE STOCK PURCHASE PLAN:

     In April 1998, the Company's Board of Directors approved the Company's
Employee Stock Purchase Plan for the United States employees (the "Employee
Purchase Plan"). A total of 300,000 shares of Common Stock has been reserved
for issuance under the Employee Purchase Plan. The Employee Purchase Plan
permits eligible employees to purchase Common Stock through payroll deductions
of up to 15% of an employee's compensation (including commissions and overtime,
but excluding other bonuses and incentive compensation), up to a maximum of
$25,000 for all offering periods ending within the same calendar year. The price
of stock purchased under the Employee Purchase Plan is 90% of the lower of the
fair market value of the Common Stock at the beginning or at the end of each
offering period. Employees may end their participation at any time during an
offering period, and they will be repaid their payroll deductions to date.

                                      F-17
<PAGE>
                            OEI INTERNATIONAL, INC.
                  NOTES TO FINANCIAL STATEMENTS -- (CONTINUED)

Participation ends automatically upon termination of employment with the Company
or any participating subsidiary. The Employee Purchase Plan will terminate in
April, 2008.

5.  EVENTS SUBSEQUENT TO THE DATE OF THE REPORT OF INDEPENDENT PUBLIC 
    ACCOUNTANTS (UNAUDITED):

     OEI has signed definitive agreements to acquire by acquisition or share
exchange five companies (the Pending Acquisitions) to be effective
contemporaneously with the Offering. The companies to be acquired are Petrocon
Engineering, Inc. and subsidiary, Paulus, Sokolowski, and Sartor, Inc., Gulsby
Engineering, Inc. and subsidiary, W-Industries, Inc., and Chemical & Industrial
Engineering, Inc. The aggregate consideration that will be paid by OEI to
acquire the Pending Acquisitions is approximately $27.8 million in cash and
5,053,027 shares of common stock.
   
     In March 1998, OEI sold 36,564 shares of Common Stock to a new member of
management. As a result, the Company recorded a non-recurring, non-cash
compensation charge of $0.5 million in the first quarter of 1998 representing
the difference between the amount paid for the shares and the estimated fair
value of the shares, which value has been discounted from the estimated initial
public offering price due primarily to restrictions on the sale and
transferability of the shares issued.
    
     In April 1998, OEI filed a registration statement on Form S-1 for the sale
of its common stock.

                                      F-18
<PAGE>
                    REPORT OF INDEPENDENT PUBLIC ACCOUNTANTS

To Petrocon Engineering, Inc.:

     We have audited the accompanying consolidated balance sheets of Petrocon
Engineering, Inc. (a Texas corporation), and subsidiaries as of December 31,
1996 and 1997, and the related consolidated statements of income, stockholders'
equity and cash flows for each of the three years in the period ended December
31, 1997. These consolidated financial statements are the responsibility of the
Company's management. Our responsibility is to express an opinion on these
consolidated financial statements based on our audits.

     We conducted our audits in accordance with generally accepted auditing
standards. Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements are free of material
misstatement. An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the consolidated financial statements. An audit
also includes assessing the accounting principles used and significant estimates
made by management, as well as evaluating the overall financial statement
presentation. We believe that our audits provide a reasonable basis for our
opinion.

     In our opinion, the consolidated financial statements referred to above
present fairly, in all material respects, the consolidated financial position of
the Company as of December 31, 1996 and 1997, and the results of their
operations and their cash flows for each of the three years in the period ended
December 31, 1997, in conformity with generally accepted accounting principles.

ARTHUR ANDERSEN LLP
Houston, Texas
March 6, 1998

                                      F-19
<PAGE>
                  PETROCON ENGINEERING, INC., AND SUBSIDIARIES
                          CONSOLIDATED BALANCE SHEETS
<TABLE>
<CAPTION>
                                                DECEMBER 31,
                                       ------------------------------     MARCH 31,
                                            1996            1997            1998
                                       --------------  --------------    -----------
                                                                         (UNAUDITED)
<S>                                    <C>             <C>               <C>        
               ASSETS
CURRENT ASSETS:
     Cash and cash equivalents.......  $      320,811  $    2,253,527    $   656,904
     Trade receivables, net..........      10,697,851      15,397,931     16,202,765
     Costs and estimated earnings in
       excess of billings on
       uncompleted contracts.........         463,786       1,881,417      3,302,316
     Current portion of note
       receivable....................          33,746          16,884         12,793
     Prepaid expenses and other......         651,116         976,100      1,194,385
     Deferred income taxes...........         667,439         543,373        599,787
                                       --------------  --------------    -----------
          Total current assets.......      12,834,749      21,069,232     21,968,950
PROPERTY AND EQUIPMENT, net..........       6,385,573       6,583,796      6,662,269
INVESTMENT IN PETROCON ARABIA,
  LTD................................       3,555,964       3,666,306      3,775,308
NOTE RECEIVABLE, net of current
  portion............................         112,525          50,040         50,040
GOODWILL, net........................       2,290,849       9,342,460      9,239,088
OTHER ASSETS.........................       1,197,107       1,190,840      1,169,212
                                       --------------  --------------    -----------
          Total assets...............  $   26,376,767  $   41,902,674    $42,864,867
                                       ==============  ==============    ===========
</TABLE>
  The accompanying notes are an integral part of these consolidated financial
                                  statements.

                                      F-20
<PAGE>
                  PETROCON ENGINEERING, INC., AND SUBSIDIARIES
                          CONSOLIDATED BALANCE SHEETS
<TABLE>
<CAPTION>
                                                DECEMBER 31,
                                       ------------------------------     MARCH 31,
                                            1996            1997            1998
                                       --------------  --------------    -----------
                                                                         (UNAUDITED)
<S>                                    <C>             <C>               <C>        
LIABILITIES AND STOCKHOLDERS' EQUITY
CURRENT LIABILITIES:
     Line of credit..................  $    5,085,908  $   11,641,357    $12,330,148
     Current maturities of long-term
       debt..........................       2,772,604       1,976,174      1,760,092
     Notes payable...................         249,544         147,284        105,282
     Accounts payable................         868,315       2,114,356      3,259,328
     Accrued compensation and
       benefits......................       4,046,574       7,749,986      6,888,183
     Billings in excess of costs and
       estimated earnings on
       uncompleted contracts.........        --               499,395        322,695
     Income taxes payable............         478,104         526,002        709,772
     Other liabilities...............         815,735         221,819        204,002
                                       --------------  --------------    -----------
          Total current
             liabilities.............      14,316,784      24,876,373     25,579,502
LONG-TERM LIABILITIES:
     Long-term debt, net of current
       maturities....................       3,756,492       2,680,046      2,240,023
     Deferred income taxes...........         424,316         427,311        407,465
                                       --------------  --------------    -----------
          Total liabilities..........      18,497,592      27,983,730     28,226,990
                                       --------------  --------------    -----------
COMMITMENTS AND CONTINGENCIES
REDEEMABLE PREFERRED STOCK...........       1,126,549        --              --
STOCKHOLDERS' EQUITY:
     Common stock, $.3333 par value;
       60,000,000 shares authorized;
       3,945,186, 4,586,328 and
       4,591,828 shares
       outstanding...................       1,315,062       1,528,760      1,530,594
     Additional paid-in capital......       3,196,068       7,473,014      7,518,212
     Retained earnings...............       2,275,271       4,917,170      5,589,071
     Treasury stock, 7,607 common
       shares, at cost...............         (33,775)       --              --
                                       --------------  --------------    -----------
          Total stockholders'
             equity..................       6,752,626      13,918,944     14,637,877
                                       --------------  --------------    -----------
          Total liabilities and
             stockholders' equity....  $   26,376,767  $   41,902,674    $42,864,867
                                       ==============  ==============    ===========
</TABLE>
  The accompanying notes are an integral part of these consolidated financial
                                  statements.

                                      F-21
<PAGE>
                  PETROCON ENGINEERING, INC., AND SUBSIDIARIES
                       CONSOLIDATED STATEMENTS OF INCOME
<TABLE>
<CAPTION>
                                                                                        THREE MONTHS
                                                                                           ENDED
                                               YEAR ENDED DECEMBER 31,                   MARCH 31,
                                       ----------------------------------------  --------------------------
                                           1995          1996          1997          1997          1998
                                       ------------  ------------  ------------  ------------  ------------
                                                                                        (UNAUDITED)
<S>                                    <C>           <C>           <C>           <C>           <C>         
REVENUES.............................  $ 52,385,813  $ 61,850,638  $ 92,616,378  $ 19,496,160  $ 25,915,315
DIRECT COSTS.........................    42,143,967    49,251,240    71,692,881    15,479,245    20,521,489
                                       ------------  ------------  ------------  ------------  ------------
    Gross profit.....................    10,241,846    12,599,398    20,923,497     4,016,915     5,393,826
GENERAL AND ADMINISTRATIVE
  EXPENSES...........................     8,358,923     9,577,274    15,315,782     3,318,177     3,792,093
                                       ------------  ------------  ------------  ------------  ------------
    Income from operations...........     1,882,923     3,022,124     5,607,715       698,738     1,601,733
OTHER INCOME (EXPENSE):
    Interest expense, net............      (456,114)     (591,848)   (1,569,475)     (349,572)     (385,557)
    Equity in earnings of Petrocon
      Arabia, Ltd....................       527,353        28,293       860,582        93,136       (42,268)
    Impairment of property...........       --            --           (363,696)      --            --
    Other............................      (145,154)       57,282      (206,269)       (5,686)      (22,783)
                                       ------------  ------------  ------------  ------------  ------------
         Income from continuing
           operations
           before income tax.........     1,809,008     2,515,851     4,328,857       436,616     1,151,125
PROVISION FOR INCOME TAX.............       598,738     1,050,853     1,574,045       158,786       479,224
                                       ------------  ------------  ------------  ------------  ------------
         Income from continuing
           operations................     1,210,270     1,464,998     2,754,812       277,830       671,901
                                       ------------  ------------  ------------  ------------  ------------
DISCONTINUED OPERATIONS:
    Loss from discontinued operations
      of construction subsidiaries
      through October 19, 1995 (net
      of $417,117 income tax
      benefit).......................      (809,699)      --            --            --            --
    Estimated loss on disposal of
      construction subsidiaries,
      including a provision of
      $341,012 for operating losses
      from October 19, 1995, to
      February 8, 1996 (net of
      $180,774 income tax benefit)...      (350,913)      --            --            --            --
                                       ------------  ------------  ------------  ------------  ------------
         Loss from discontinued
           operations................    (1,160,612)      --            --            --            --
                                       ------------  ------------  ------------  ------------  ------------
NET INCOME...........................  $     49,658  $  1,464,998  $  2,754,812  $    277,830  $    671,901
                                       ============  ============  ============  ============  ============
</TABLE>
  The accompanying notes are an integral part of these consolidated financial
                                  statements.

                                      F-22
<PAGE>
                  PETROCON ENGINEERING, INC., AND SUBSIDIARIES
                CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY
<TABLE>
<CAPTION>
                                            COMMON STOCK       ADDITIONAL                   TREASURY STOCK        TOTAL
                                       ----------------------    PAID-IN     RETAINED    --------------------  STOCKHOLDERS'
                                        SHARES      AMOUNT       CAPITAL     EARNINGS     SHARES     AMOUNT       EQUITY
                                       ---------  -----------  -----------  -----------  ---------  ---------  ------------
<S>                                    <C>        <C>          <C>          <C>                     <C>        <C>         
BALANCE, January 1, 1995.............  3,857,147  $ 1,285,716  $ 1,381,965  $ 1,603,027     --      $  --      $  4,270,708
    Purchase of treasury stock.......     --          --           --           --          (7,607)   (33,775)      (33,775)
    Accretion on redeemable preferred
      stock..........................     --          --           --          (421,200)    --         --          (421,200)
    Net income.......................     --          --           --            49,658     --         --            49,658
                                       ---------  -----------  -----------  -----------  ---------  ---------  ------------
BALANCE, December 31, 1995...........  3,857,147    1,285,716    1,381,965    1,231,485     (7,607)   (33,775)    3,865,391
    Common stock issued..............     88,039       29,346      581,547      --          --         --           610,893
    Accretion on redeemable preferred
      stock..........................     --          --           --          (421,212)    --         --          (421,212)
    Redemption of preferred stock....     --          --           --           --          --         --           --
    Warrants issued in connection
      with
      acquisition....................     --          --         1,232,556      --          --         --         1,232,556
    Net income.......................     --          --           --         1,464,998     --         --         1,464,998
                                       ---------  -----------  -----------  -----------  ---------  ---------  ------------
BALANCE, December 31, 1996...........  3,945,186    1,315,062    3,196,068    2,275,271     (7,607)   (33,775)    6,752,626
    Common stock issued..............    542,443      180,812    4,043,607      --          --         --         4,224,419
    Treasury stock issued............     --          --           --           --           7,607     33,775        33,775
    Redemption of preferred stock....     98,699       32,886      233,339      --          --         --           266,225
    Accretion on redeemable preferred
      stock..........................     --          --           --          (112,913)    --         --          (112,913)
    Net income.......................     --          --           --         2,754,812     --         --         2,754,812
                                       ---------  -----------  -----------  -----------  ---------  ---------  ------------
BALANCE, December 31, 1997...........  4,586,328    1,528,760    7,473,014    4,917,170     --         --        13,918,944
    Common stock issued
      (unaudited)....................      5,500        1,834       41,176      --          --         --            43,010
    Other (unaudited)................     --          --             4,022      --          --         --             4,022
    Net income (unaudited)...........     --          --           --           671,901     --         --           671,901
                                       ---------  -----------  -----------  -----------  ---------  ---------  ------------
BALANCE, March 31, 1998
  (unaudited)........................  4,591,828  $ 1,530,594  $ 7,518,212  $ 5,589,071     --      $  --      $ 14,637,877
                                       =========  ===========  ===========  ===========  =========  =========  ============
</TABLE>
  The accompanying notes are an integral part of these consolidated financial
                                  statements.

                                      F-23
<PAGE>
                  PETROCON ENGINEERING, INC., AND SUBSIDIARIES
                     CONSOLIDATED STATEMENTS OF CASH FLOWS
<TABLE>
<CAPTION>
                                                                                        THREE MONTHS
                                                                                           ENDED
                                               YEAR ENDED DECEMBER 31,                   MARCH 31,
                                       ----------------------------------------  --------------------------
                                           1995          1996          1997          1997          1998
                                       ------------  ------------  ------------  ------------  ------------
                                                                                        (UNAUDITED)
<S>                                    <C>           <C>           <C>           <C>           <C>         
CASH FLOWS FROM OPERATING ACTIVITIES:
  Net income.........................  $     49,658  $  1,464,998  $  2,754,812  $    277,830  $    671,901
  Adjustments to reconcile net income
   to net cash provided by operating
   activities --
    Depreciation and amortization....       903,271       868,037     1,760,549       434,873       418,305
    Equity in undistributed earnings
     of Petrocon Arabia, Ltd.........      (227,353)      971,707      (110,582)      (93,136)     (109,002)
    Issuance of stock to
     management......................       --            102,293        24,420       --             47,031
    Deferred income taxes............      (689,421)      141,286        22,461       (79,472)      (76,256)
    Other, net.......................       240,621        27,565       262,479       --             (4,595)
  Changes in current assets and
   liabilities, net of effects of
   acquisitions --
    (Increase) decrease in --
      Trade receivables..............       806,140     1,855,630    (3,266,554)   (1,292,816)     (804,834)
      Costs and estimated earnings in
       excess of billings on
       uncompleted contracts.........    (1,963,187)    1,499,401    (1,417,631)      463,786    (1,420,899)
      Prepaid expenses and other.....      (120,708)      203,032       323,079      (180,046)     (199,268)
    Increase (decrease) in --
      Accounts payable...............       404,999      (939,071)      802,052       608,321     1,144,972
      Accrued compensation and
       benefits......................       438,499      (394,969)    2,687,042      (447,669)     (854,503)
      Billings in excess of costs and
       estimated earnings on
       uncompleted contracts.........     1,390,412    (1,390,412)      499,395       --           (176,700)
      Accrual for loss on disposal of
       discontinued operations.......       114,307      (196,588)      --            --            --
      Other liabilities..............      (192,120)     (369,714)     (593,916)     (380,374)      (16,044)
      Income taxes receivable
       (payable).....................      (868,707)      771,243      (449,102)      (76,389)      183,770
                                       ------------  ------------  ------------  ------------  ------------
    Net cash provided by operating
     activities......................       286,411     4,614,438     3,298,504      (765,092)   (1,196,122)
                                       ------------  ------------  ------------  ------------  ------------
CASH FLOWS FROM INVESTING ACTIVITIES:
  Purchase of property and
   equipment.........................      (781,629)     (723,056)   (1,186,607)     (248,614)     (378,241)
  Cash used for acquisitions, net of
   cash acquired.....................       --         (1,187,974)   (3,134,223)   (3,011,964)      --
  Other, net.........................        (6,582)       18,108       100,867       --             12,584
                                       ------------  ------------  ------------  ------------  ------------
    Net cash used in investing
     activities......................      (788,211)   (1,892,922)   (4,219,963)   (3,260,578)     (365,657)
                                       ============  ============  ============  ============  ============
</TABLE>
  The accompanying notes are an integral part of these consolidated financial
                                  statements.

                                      F-24
<PAGE>
                  PETROCON ENGINEERING, INC., AND SUBSIDIARIES
                     CONSOLIDATED STATEMENTS OF CASH FLOWS
<TABLE>
<CAPTION>
                                                                                            THREE MONTHS
                                                                                               ENDED
                                                 YEAR ENDED DECEMBER 31,                     MARCH 31,
                                       -------------------------------------------  ----------------------------
                                           1995           1996           1997           1997           1998
                                       -------------  -------------  -------------  -------------  -------------
                                                                                            (UNAUDITED)
CASH FLOWS FROM FINANCING ACTIVITIES:
<S>                                    <C>            <C>            <C>            <C>            <C>    
  Purchase of treasury stock.........  $     (33,775) $    --        $    --        $    --        $    --
  Redemption of preferred stock......       --           (3,225,860)      (939,463)      --             --
  Debt financing costs...............       --             (145,509)      --             --             --
  Proceeds from borrowings under line
    of credit........................     33,977,000     56,614,032    106,438,476     25,205,056     25,776,612
  Payments on line of credit.........    (34,762,000)   (55,178,123)   (99,883,027)   (20,920,666)   (25,087,821)
  Proceeds from issuance of notes
    payable..........................      2,916,623      1,935,645      1,806,296        372,140       --
  Principal payments on notes
    payable..........................     (1,516,301)    (2,768,340)    (4,568,107)      (740,821)      (723,635)
                                       -------------  -------------  -------------  -------------  -------------
      Net cash provided by (used in)
         financing activities........        581,547     (2,768,155)     2,854,175      3,915,709        (34,844)
                                       -------------  -------------  -------------  -------------  -------------
NET INCREASE (DECREASE) IN CASH AND
  CASH EQUIVALENTS...................         79,747        (46,639)     1,932,716       (109,961)    (1,596,623)
CASH AND CASH EQUIVALENTS, beginning
  of year............................        287,703        367,450        320,811       (198,429)     2,253,527
                                       -------------  -------------  -------------  -------------  -------------
CASH AND CASH EQUIVALENTS, end of
  year...............................  $     367,450  $     320,811  $   2,253,527  $    (308,390) $     656,904
                                       =============  =============  =============  =============  =============
NONCASH ACTIVITIES:
  Insurance acquired with notes
    payable..........................  $     143,743  $     285,175  $     370,054  $    --        $      25,528
  Accretion on redeemable preferred
    stock............................        421,200        421,212        112,913         13,434       --
  Fair value of warrants issued as
    consideration for acquisition....       --            1,232,556       --             --             --
  Shares issued as consideration for
    acquisition......................       --             --            4,200,000       --             --
  Additional consideration payable
    for acquisitions.................       --               89,409        916,781       --             --
  Fair value of shares and options
    issued for redemption of
    preferred stock..................       --             --            1,572,910       --             --
  Combination of balances related to
    discontinued operations --
  Net book value of equipment
    disposed.........................        433,758       --             --             --             --
  Loans on equipment disposed........        385,364       --             --             --             --
SUPPLEMENTAL CASH FLOW INFORMATION:
  Cash paid during the year for --
    Interest.........................        512,353        540,089      1,314,140        260,917        389,010
    Income taxes.....................      1,558,973        714,461      2,007,791        495,000        311,697
</TABLE>
  The accompanying notes are an integral part of these consolidated financial
                                  statements.

                                      F-25
<PAGE>
                  PETROCON ENGINEERING, INC., AND SUBSIDIARIES
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

1.  SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES:

  BUSINESS ACTIVITY

     Petrocon Engineering, Inc. (a Texas corporation), is an international
engineering, systems and construction management contractor, servicing
industrial customers with primary focus in the process industries -- oil,
chemical, petrochemical and forest products.

     A brief description of the active companies included in the consolidated
group follows:

     a.  PETROCON ENGINEERING, INC. (PEI) -- Provides general engineering
         services for industrial customers with specialties in the areas of
         distributive control systems, forest products, power distribution,
         process design and process safety management.

     b.  PETROCON ENGINEERING OF LOUISIANA, INC. (PEI-LA) -- Extends PEI's
         service area into southwest Louisiana.

     c.  PETROCON SYSTEMS, INC. (PSI) -- Provides design, fabrication,
         installation, start-up, checkout and maintenance of analyzers and PLC
         systems.

     d.  PETROCON TECHNOLOGIES, INC. (PTI) -- Currently provides development,
         sales and marketing focused on PTI's licensed hybrid low NOX process.

     e.  PETROCON CONSTRUCTION RESOURCES, INC. (PCR) -- Provides technical,
         inspection and operator personnel within client facilities.

     f.  TRIANGLE ENGINEERS AND CONSTRUCTORS, INC. (TE&C) -- Provides
         engineering services and construction management services.

     g.  RPM ENGINEERING, INC. (RPM) -- Provides engineering services in
         southeast Louisiana.

     h.  ALLIANCE ENGINEERING, INC. (AEI) -- Provides upstream engineering
         design and project services.

     The Company and its stockholders intend to enter into a definitive
agreement with OEI International, Inc. (OEI), pursuant to which all outstanding
shares of the Company's common stock will be exchanged for cash and shares of
OEI common stock concurrently with the consummation of the initial public
offering (the Offering) of the common stock of OEI.

  PRINCIPLES OF CONSOLIDATION

     The accompanying consolidated financial statements include the accounts of
Petrocon Engineering, Inc., and its wholly owned subsidiaries (collectively, the
Company). All significant intercompany transactions have been eliminated in
consolidation.

  INTERIM FINANCIAL INFORMATION

     The interim financial statements as of March 31, 1998, and for the three
months ended March 31, 1997 and 1998, are unaudited, and certain information and
footnote disclosures, normally included in financial statements prepared in
accordance with generally accepted accounting principles, have been omitted. In
the opinion of management, all adjustments, consisting only of normal recurring
adjustments, necessary to fairly present the financial position, results of
operations and cash flows with respect to the interim financial statements, have
been included. The results of operations for the interim periods are not
necessarily indicative of the results for the entire fiscal year.

  REVENUE RECOGNITION

     The Company provides a majority of its services through cost-plus
contracts. Revenues are recognized to the extent of billable rates times hours
delivered plus other reimbursable expenses incurred. Accounts receivable include
amounts currently billable per cost-plus contracts that are not billed until the
following

                                      F-26
<PAGE>
                  PETROCON ENGINEERING, INC., AND SUBSIDIARIES
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

period. Fixed-price contracts represent approximately 5%, 8% and 14% of revenues
in 1995, 1996 and 1997, respectively. Revenue on fixed-price contracts is
recognized using the percentage-of-completion method of accounting. Methods used
to measure percentage of completion consist of labor hours or costs incurred
compared to total estimated labor hours or costs or other appropriate bases of
measurement. Revisions in revenue and cost projections are recorded in the
period in which the facts requiring the revision become known. When estimates of
projected revenues and costs indicate a loss, the total estimated loss is
accrued. Contract performance incentives are included in income when earned.
Potential additional revenues on projects from claims and unapproved change
orders are not recognized until amounts may be reliably estimated and
realization is virtually certain. The asset "Costs and estimated profits in
excess of billings on uncompleted contracts" represents revenues recognized in
excess of amounts billed. The liability "Billings in excess of costs and
estimated profits on uncompleted contracts" represents amounts billed in excess
of revenues recognized.

  CASH AND CASH EQUIVALENTS

     Cash and cash equivalents include certificates of deposit with maturities
of three months or less.

  INVESTMENTS

     The Company has a one-third ownership interest in PEI Investments, a Texas
joint venture. The Company uses the equity method of accounting for this
investment. In addition, the Company accounts for its 50% interest in Petrocon
Arabia Limited (PAL) by the equity method. PAL, an engineering company located
in Saudi Arabia, provides general engineering services for oil field, pipeline,
gas plants and offshore facilities as well as refinery and petrochemical plants.
Results of operations for PAL are translated at the average exchange rate for
the year.

  PROPERTY AND EQUIPMENT

     Property and equipment are stated at cost, and depreciation is computed
using the straight-line method over the estimated useful lives of the assets.
Leasehold improvements are capitalized and amortized over the lesser of the life
of the lease or the estimated useful life of the asset.

     Expenditures for repairs and maintenance are charged to expense when
incurred. Expenditures for major renewals and betterments, which extend the
useful lives of existing equipment, are capitalized and depreciated. Upon
retirement or disposition of property and equipment, the cost and related
accumulated depreciation are removed from the accounts and any resulting gain or
loss is recognized in the statements of income.

     The Company has adopted Statement of Financial Accounting Standards (SFAS)
No. 121, "Accounting for the Impairment of Long-Lived Assets and for Long-Lived
Assets to Be Disposed Of." Accordingly, in the event that facts and
circumstances indicate that property and equipment may be impaired, an
evaluation of recoverability would be performed. If an evaluation is required,
the estimated future undiscounted cash flow associated with the asset is
compared to the asset's carrying amount to determine if a write-down to fair
value is necessary.

     During 1997, the Company wrote off approximately $241,000 of leasehold
improvements made to a leased facility which the Company vacated prior to the
expiration of the lease term. Additionally, the Company has, during 1997,
written down to fair value certain property which the Company elected to hold
for sale. The amount of the property write-down was approximately $122,000, and
the net realizable value of the property, based on an independent appraisal, was
$275,000 at December 31, 1997. These write-downs have been included in the
accompanying consolidated statement of income for the year ended December 31,
1997.

                                      F-27
<PAGE>
                  PETROCON ENGINEERING, INC., AND SUBSIDIARIES
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

  INCOME TAX

     The Company follows the liability method of accounting for income taxes in
accordance with SFAS No. 109, "Accounting for Income Taxes." Under this
method, deferred income taxes are recorded based upon the differences between
the financial reporting and tax bases of assets and liabilities and are measured
using the enacted tax rates and laws that will be in effect when the underlying
assets or liabilities are recovered or settled.

  STOCK OPTIONS

     The Company has adopted SFAS No. 123, "Accounting for Stock-Based
Compensation," and, as permitted, has elected to calculate compensation expense
in accordance with Accounting Principles Bulletin Opinion No. 25 which
calculates compensation expense as the difference between the employee's
exercise price and the current price of the underlying stock. See Note 10 for
the financial statement effects from the adoption of this pronouncement.

  FAIR VALUES OF FINANCIAL INSTRUMENTS

     The Company enters into various types of financial instruments in the
normal course of business. The Company does not hold or issue financial
instruments for trading purposes, nor does it hold interest rate, leveraged or
other types of derivative financial instruments. The carrying amounts of the
Company's financial instruments approximate their fair values.

  INTANGIBLE ASSETS AND AMORTIZATION

     Goodwill represents the excess of cost over the fair value of net tangible
assets of businesses acquired. Goodwill is being amortized on a straight-line
basis over an expected useful life of 40 years. Other intangible assets,
included in other assets, are amortized over the period expected to be benefited
(five to seven years). Amortization expense for goodwill and other intangible
assets was $1,020, $53,651 and $336,375 for 1995, 1996 and 1997, respectively.
Accumulated amortization of goodwill at December 31, 1996 and 1997, was $55,606
and $391,981, respectively. See Note 12 for amortization of cost over equity in
net assets included in the equity in earnings of PAL.

  USE OF ESTIMATES

     The preparation of the Company's financial statements in conformity with
generally accepted accounting principles, particularly in the use of the
percentage-of-completion method of accounting, requires management to make
estimates and assumptions that affect the reported amounts of assets and
liabilities and disclosures of contingent assets and liabilities at the date of
the financial statements and the reported amounts of revenues and expenses
during the reporting period. Actual results could differ from those estimates.

2.  MAJOR CUSTOMERS AND CREDIT RISK:

     A significant portion of the Company's customers are engaged in the energy
industry. This concentration of customers may impact the Company's overall
exposure to credit risk, either positively or negatively, in that customers may
be similarly affected by changes in economic and industry conditions. The
Company performs ongoing credit evaluations of its customers and does not
generally require collateral in support of its trade receivables. The Company
maintains reserves for potential credit losses, and actual losses have
historically been within the Company's expectations. Foreign sales also present
various risks, including risks of war, civil disturbances and adverse
governmental activities. Most of the Company's foreign sales are to large
international companies or are secured by letters of credit or similar
arrangements. The Company does not believe itself to be dependent to any
material degree on any single customer.

                                      F-28
<PAGE>
                  PETROCON ENGINEERING, INC., AND SUBSIDIARIES
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

3.  PROPERTY AND EQUIPMENT:

     Property and equipment consist of the following (dollars in thousands):

                                          ESTIMATED        DECEMBER 31,
                                        USEFUL LIVES   --------------------
                                          IN YEARS       1996       1997
                                        -------------  ---------  ---------
Land.................................                  $     535  $     500
Buildings............................        39            2,627      2,250
Transportation equipment.............         5              283        289
Machinery and equipment..............       5-10             885      1,674
Computer equipment and software......        3-5           3,607      5,278
Leasehold improvements...............       5-10             661        591
Furniture and fixtures...............        10            1,261        922
                                                       ---------  ---------
                                                           9,859     11,504
Less -- Accumulated depreciation.....                      3,473      4,921
                                                       ---------  ---------
     Property and equipment, net.....                  $   6,386  $   6,583
                                                       =========  =========

4.  DETAIL OF CERTAIN BALANCE SHEET ACCOUNTS:

     The components of trade receivables are as follows:

                                                DECEMBER 31,
                                       ------------------------------
                                            1996            1997
                                       --------------  --------------
Amounts billable at December 31,
  billed January of the following
  year...............................  $    2,566,000  $    3,592,762
Amounts billed at December 31........       7,982,368      11,722,706
Retainage............................         262,376         264,027
Allowance for uncollectible
  accounts...........................        (112,893)       (181,564)
                                       --------------  --------------
                                       $   10,697,851  $   15,397,931
                                       ==============  ==============

     Activity in the Company's allowance for doubtful accounts consists of the
following (in thousands):

                                                DECEMBER 31,
                                       -------------------------------
                                         1995       1996       1997
                                       ---------  ---------  ---------
Balance at beginning of year.........  $     124  $     137  $     113
Balance acquired at purchase of
  subsidiary.........................     --             66     --
Additions to costs and expenses......        126         87        120
Deductions for uncollectible
  receivables written off and
  recoveries.........................       (113)      (177)       (51)
                                       ---------  ---------  ---------
                                       $     137  $     113  $     182
                                       =========  =========  =========

                                      F-29
<PAGE>
                  PETROCON ENGINEERING, INC., AND SUBSIDIARIES
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

     The status of fixed-price contracts in progress is as follows (in
thousands):

                                           DECEMBER 31,
                                       --------------------
                                         1996       1997
                                       ---------  ---------
Costs incurred on contracts in
  progress...........................  $   2,608  $   7,198
Estimated earnings, net of losses....        801      1,933
                                       ---------  ---------
                                           3,409      9,131
Less -- Billings to date.............     (2,945)    (7,749)
                                       ---------  ---------
                                       $     464  $   1,382
                                       =========  =========
Costs and estimated earnings in
  excess of billings on uncompleted
  contracts..........................  $     464  $   1,881
Billings in excess of costs and
  estimated earnings on uncompleted
  contracts..........................     --           (499)
                                       ---------  ---------
                                       $     464  $   1,382
                                       =========  =========

5.  LINE OF CREDIT AND DEBT:
   
     The Company has a line of credit with a credit limit of $13,000,000, of
which $5,085,908 and $11,641,357 was outstanding at December 31, 1996 and 1997,
respectively. The line of credit is secured by an interest in all of the
Company's accounts receivable and expires on August 8, 1999. Advances on the
credit line accrue interest at a rate equal to one-half of 1% plus the prime
rate (9.0% at December 31, 1997), and the commitment fee on the unused line of
credit is 0.25%. Interest is payable monthly. The line of credit contains
covenants pertaining to the maintenance of certain ratios, including fixed
charge coverage, specified levels of certain other items, including tangible net
worth and EBITDA, and various other covenants as specified in the loan
agreement, as amended. The credit limit on the line of credit was increased to
$14,000,000 in March 1998, and thereafter was subsequently increased to
$14,500,000.
    
     In August 1996, the Company refinanced its long-term debt. The refinancing
paid off all long-term debt and established two term loans and a new line of
credit. Debt financing costs of approximately $145,000 were incurred in
conjunction with the refinancing. These costs are being amortized over three
years, the life of the debt agreement.

     Debt consists of the following:

                                                DECEMBER 31,
                                       ------------------------------
                                            1996            1997
                                       --------------  --------------
Heller Financial, Inc. --
     Term Loan A, interest at prime
       plus 0.75% (9.25% at December
       31, 1997) due in monthly
       installments, maturing through
       1999..........................  $    2,151,933  $    2,610,000
     Term Loan B, interest at prime
       plus 1.25% (9.75% at December
       31, 1997) due in quarterly
       installments, maturing through
       1999..........................       3,083,333       1,793,357
Merrill Lynch Business Financial
  Services, Inc......................         834,570        --
RPM Investments, Inc., interest at
  10% due in three installments,
  maturing through 1998..............         400,000         200,000
Other................................          59,260          52,863
                                       --------------  --------------
                                            6,529,096       4,656,220
     Less -- Current maturities......      (2,772,604)     (1,976,174)
                                       --------------  --------------
                                       $    3,756,492  $    2,680,046
                                       ==============  ==============

                                      F-30
<PAGE>
                  PETROCON ENGINEERING, INC., AND SUBSIDIARIES
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

     Substantially all debt is collateralized by security interests in accounts
receivable, property and equipment.

     Maturities of long-term debt are as follows:

Year ending December 31 --
     1998............................  $  1,976,174
     1999............................     2,680,046
                                       ------------
                                       $  4,656,220
                                       ============

6.  LEASES:

     The Company leases office space under noncancelable operating lease
agreements. Minimum payments on the multiyear leases over the remaining terms of
the leases are as follows:

Year ending December 31 --
     1998............................  $  1,280,992
     1999............................       967,812
     2000............................       505,815
     2001............................       225,757
     2002............................         5,700
                                       ------------
                                       $  2,986,076
                                       ============

     Rent expense for operating leases was $870,735, $1,036,776 and $1,373,555
for the years ended December 31, 1995, 1996 and 1997, respectively.

7.  INCOME TAXES:

     Federal and state income taxes are as follows:

                                              YEAR ENDED DECEMBER 31,
                                       --------------------------------------
                                          1995         1996          1997
                                       ----------  ------------  ------------
Federal --
     Current.........................  $  483,884  $    743,168  $  1,476,332
     Deferred........................    (623,183)      123,677      (134,352)
State --
     Current.........................     206,384       166,399       266,477
     Deferred........................     (66,238)       17,609       (34,412)
                                       ----------  ------------  ------------
                                       $      847  $  1,050,853  $  1,574,045
                                       ==========  ============  ============

     The provision for income tax does not include foreign income taxes of
$458,914, $155,330 and $781,006 for the years ended December 31, 1995, 1996 and
1997, respectively. These foreign income taxes are attributable to the Company's
interest in PAL (see Note 12). The earnings of PAL have been reflected net of
income taxes in equity in earnings of PAL in the accompanying statements of
income.

                                      F-31
<PAGE>
                  PETROCON ENGINEERING, INC., AND SUBSIDIARIES
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

     Actual income tax expense differs from income tax expense computed by
applying the U.S. federal statutory corporate rate of 34% to income from
continuing operations before income taxes as follows:

                                                     DECEMBER 31,
                                       ----------------------------------------
                                           1995          1996          1997
                                       ------------  ------------  ------------
Provision at the statutory rate......  $    615,062  $    855,389  $  1,471,811
Increase (decrease) resulting from --
     Goodwill amortization and
       other.........................       (44,012)       71,670       338,210
     Increase (decrease) in valuation
       allowance.....................       101,049       (28,794)      (10,689)
     Net cost (benefit) of foreign
       tax credit from unconsolidated
       foreign subsidiary............      (143,336)       25,156      (366,749)
     State income tax, net of benefit
       for federal deduction.........        69,975       127,432       141,462
                                       ------------  ------------  ------------
                                       $    598,738  $  1,050,853  $  1,574,045
                                       ============  ============  ============

     Deferred income tax provisions result from temporary differences in the
recognition of income and expenses for financial reporting purposes and for tax
purposes. The tax effects of these temporary differences, representing deferred
tax assets and liabilities, result principally from the following:

                                              DECEMBER 31,
                                       --------------------------
                                           1996          1997
                                       ------------  ------------
Net current deferred income tax
  assets (liabilities) --
     Accrued expenses................  $    651,953  $    737,504
     Allowance for doubtful accounts
       receivable....................        15,486        69,686
     Deferred income.................       --           (263,817)
                                       ------------  ------------
                                       $    667,439  $    543,373
                                       ============  ============
Net noncurrent deferred income tax
  assets (liabilities) --
     Depreciation and amortization...  $   (432,275) $   (440,061)
     Federal and state net operating
       loss carryforward.............       221,378       215,480
     Valuation allowance.............      (213,419)     (202,730)
                                       ------------  ------------
                                       $   (424,316) $   (427,311)
                                       ============  ============

     At December 31, 1997, the Company had state of California, state of Texas
and federal net operating loss carryforwards of $317,050, $3,108,557 and
$133,685, respectively, which will expire between 1998 and 2012. Most of the
federal and all of the state net operating loss carryforwards are expected to
expire unused. The valuation allowance is due to expected expiration of net
operating loss carryforwards. During 1997, the deferred tax asset and valuation
allowance were reduced by $10,689 due to the expiration of net operating losses
that were not expected to be utilized.

8.  STOCKHOLDERS' EQUITY:

     The Company has a common stock redemption agreement whereby, upon a
stockholder's employment termination, divorce or desire to sell, the Company has
right of first refusal to purchase the stock held by such stockholder. Upon the
death or disability of a stockholder, the Company is obligated to purchase the
stock held by such stockholder subject to certain limits as set forth by the
Company's amended and restated stockholders' agreement. The purchase price per
share is at fair market value, as determined by the Company's board of
directors, in its good faith, and as reasonably acceptable to the stockholder.

                                      F-32
<PAGE>
                  PETROCON ENGINEERING, INC., AND SUBSIDIARIES
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

     In 1996, the Company issued 65,000 shares of common stock valued at $4.44
per share in connection with the acquisition of TE&C (see Note 15) and awarded a
stock bonus to management of 23,039 shares valued at $4.44 per share.

     In 1997, the Company issued 536,943 shares of common stock valued at $7.82
per share in connection with the acquisition of AEI (see Note 15).

9.  REDEEMABLE PREFERRED STOCK:

     The Company has authorized 3,000,000 shares of $.3333 par value preferred
stock, which may be divided into one or more series as determined by the board
of directors. The board is authorized to fix and determine the relative rights
and preferences of each series as to dividend rate, redemption, liquidation
preferences, sinking fund provision, convertibility and voting rights. As
described below, the board has established one series of redeemable preferred
stock consisting of 675,168 shares.

     The Company's Series A convertible preferred stock (Series A) was issued
for the purpose of acquiring PAL Series A is convertible into common shares at a
specified conversion ratio based upon a conversion price of $3.33 per share, and
the stock has a liquidation preference based upon a stated value of $4.44 per
share plus the greater of a valuation increment of 12% per annum compounded from
August 31, 1992, or the increment that would have occurred had the shares been
converted to common shares. The Series A shares have full voting rights
determined by the specified conversion ratio. Stockholders may demand redemption
of up to one-sixth of their shares on September 30, 1996, and an additional
one-sixth every six months thereafter until March 31, 1999. Such redemption
rights are cumulative for any amounts not previously redeemed. The redemption
price is equal to the stated value of $4.44 per share plus a redemption premium
computed as a 12% annualized compound rate of return on the stated value from
August 31, 1992, through the redemption date.

     During such time as any shares of Series A are outstanding, the Company may
not declare or pay any dividend on or otherwise acquire or retire for value any
shares of common stock, except as required under the stock redemption agreement
described above. As of December 31, 1997, the Company has charged accretion
toward the redemption value in the aggregate amount of $1,774,785 to retained
earnings and increased the redeemable preferred stock by the same amount.

     In August 1996, the Company redeemed 463,592 shares of its Series A at
$4.44 per share plus 12% per annum as provided in the stock agreement. In August
1997, the remaining 154,531 of the Series A shares were redeemed by the Company
in exchange for (a) cash of $939,463, (b) the issuance of 106,306 shares of
common stock and (c) the issuance of options to purchase 135,998 shares of
common stock of the Company for a price of $4.44 per share. At December 31,
1997, there are no shares of Series A outstanding.

10.  EMPLOYEE BENEFIT PLANS:

     Employees of the Company may participate in a 401(k) savings plan, whereby
the employees may elect to make contributions pursuant to a salary reduction
agreement upon meeting age and length-of-service requirements. The plan also
provides for discretionary contributions by the Company, as determined by the
board of directors. Under the plan, contributions to the 401(k) plan will be
made in the name of each participating employee in direct proportion to the
employee's 401(k) contribution. Contributions of $266,000 and $220,000 are
included in accrued expenses for the years ended December 31, 1996 and 1997,
respectively. No contributions were made related to the year ended December 31,
1995.

     The Company and its employees contribute to a health plan that is
self-insured by the Company up to $60,000 per claim and approximately $2,300,000
in the aggregate.

                                      F-33
<PAGE>
                  PETROCON ENGINEERING, INC., AND SUBSIDIARIES
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

     The Company has a nonqualified stock option plan that provides for the
issuance of options up to 1,200,000 shares of the Company's common stock. The
exercise price per share at the date of grant is equal to the fair market value
of the Company's common stock; therefore, no compensation expense is recognized.
Vesting of the options is generally as follows: one-third after one year,
two-thirds after two years and all after three years. Other vesting schedules
can be followed. Some of the options granted during 1996 and 1997 vest 10% at
grant date, 10% at January 1 of the year following grant and 10% annually
thereafter until fully vested. Another option granted during 1997 vests 16.67%
at January 1, 1998, and is fully vested in six years. Options are canceled upon
termination of employment and lapse 10 years after grant. A summary of stock
option activity is as follows:

                                                     EXERCISE
                                                     PRICE PER
                                        SHARES         SHARE
                                       ---------     ---------
Outstanding, January 1, 1995.........     94,750       $4.44
Granted..............................      4,890        4.44
Canceled.............................       (800)       4.44
                                       ---------
Outstanding, December 31, 1995.......     98,840        4.44
Granted..............................    474,865        4.44
Granted..............................    397,700        6.50
Canceled.............................     (4,150)       4.44
                                       ---------
Outstanding, December 31, 1996
  (397,700 options at $6.50 and
  569,555 options at $4.44)..........    967,255
Granted..............................      1,000        4.44
Granted..............................     34,000        6.50
Canceled.............................     (8,475)       4.44
                                       ---------
Outstanding, December 31, 1997
  (431,700 options at $6.50 and
  562,080 options at $4.44)..........    993,780
                                       =========
Exercisable, December 31, 1997
  (60,770 options at $6.50 and
  212,843 options at $4.44)..........    273,613
                                       =========
Available for grant, December 31,
  1997...............................     70,222
                                       =========
Weighted average remaining life of
  options outstanding at December 31,
  1997...............................       6.24
                                       =========

     The summary above does not include 135,998 options issued in consideration
for redemption of Series A preferred shares (see Note 9).

     Stock-based compensation costs, as calculated under SFAS No. 123, would
have reduced pretax income by approximately $357,533 and $47,301 in 1996 and
1997, respectively, if the fair values of the options granted in those years had
been recognized as compensation expense on a straight-line basis over the
vesting period of the grant. For the purposes of SFAS No. 123, the fair market
value of the options granted during 1996 and 1997 used a risk-free interest rate
of 6.8% and 5.8%, respectively, an expected life of 10 years and expected
dividends of 0%. The pro forma effect on net income for 1996 and 1997 may not be
representative of the pro forma effect on net income in future years because it
does not take into consideration pro forma compensation expense related to
grants made prior to 1995.

11.  RELATED-PARTY TRANSACTIONS:

     The Company leases office space from PEI Investments, a Texas joint
venture, of which the Company and an officer each own a one-third interest.
Rental paid under these leases was $105,632 for 1995, 1996

                                      F-34
<PAGE>
                  PETROCON ENGINEERING, INC., AND SUBSIDIARIES
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

and 1997. The lease expires in 2000 and has a present annual rental rate of
approximately $115,000. The Company is contingently liable as a guarantor for a
PEI Investments bank loan. The principal balance was $288,838 and $229,916 at
December 31, 1996 and 1997, respectively.

     During 1995, 1996 and 1997, the Company provided services to PAL which
totaled $176,521, $56,216 and $33,083, respectively, in revenue. A receivable of
$1,381 and $3,158 for these services was outstanding at December 31, 1996 and
1997, respectively.

     The Company had a note payable to RPM Investments, Inc., a partnership
owned by members of Company management, in the amount of $400,000 and $200,000
at December 31, 1996 and 1997, respectively.

12.  PETROCON ARABIA LIMITED:

     The Company accounts for its 50% investment in PAL under the equity method
of accounting. Financial statement information of PAL as of and for the years
ended December 31, 1995, 1996 and 1997, is as follows:

                                      1995          1996           1997
                                  ------------  ------------  --------------
Revenues........................  $  9,186,507  $  8,143,516  $   16,376,628
Net income......................     1,276,200       267,873       1,932,444
Total assets....................     8,500,268     6,981,670       9,860,244
Stockholders' equity............     6,076,724     4,839,827       5,272,270

     The difference between the carrying amount of the investment and the
underlying equity in net assets at acquisition date consisted of a noncompete
agreement in the amount of $1,000,000 and goodwill of $669,023, which are being
amortized over 15 years and 40 years, respectively.

     The Company's equity in PAL and its earnings from PAL as of December 31,
1995, 1996 and 1997, and for the years then ended are as follows:

                                           1995          1996          1997
                                       ------------  ------------  ------------
Company's equity in PAL..............  $  3,265,827  $  2,419,914  $  2,636,135
Unamortized excess of cost over
  equity in underlying net assets
  acquired...........................     1,242,998     1,136,050     1,030,171
                                       ------------  ------------  ------------
          Company's investment in
             PAL.....................  $  4,508,825  $  3,555,964  $  3,666,306
                                       ============  ============  ============
Company's equity in net income of
  PAL................................  $    638,100  $    133,937  $    966,222
Amortization of the excess of cost
  over equity in underlying net
  assets acquired....................      (110,747)     (105,644)     (105,640)
                                       ------------  ------------  ------------
          Company's equity in
             earnings of PAL.........  $    527,353  $     28,393  $    860,582
                                       ============  ============  ============

     The Company has guaranteed borrowings of PAL up to the amount of
$1,133,333.

                                      F-35
<PAGE>
                  PETROCON ENGINEERING, INC., AND SUBSIDIARIES
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

13.  DISCONTINUED OPERATIONS:

     On October 19, 1995, the board of directors approved a resolution to
discontinue all operations of Petrocon Plant Services, Inc. (PPS), PCR and
Petrocon Instrument and Electrical, Inc. (PIE), except for the PCR and PPS
inspection operations. The related financial results are reported as
discontinued operations. On February 8, 1996, the Company sold the discontinued
operations of PIE for $303,083. Combined financial statement information of the
discontinued operations through October 19, 1995, is as follows:

Revenues.............................  $   13,669,901
Operating costs......................     (14,858,327)
Interest expense.....................         (38,390)
Income tax benefit...................         417,117
                                       --------------
     Net loss........................  $     (809,699)
                                       ==============

     For the period from October 19, 1995, through December 31, 1995, the
discontinued operations had a net loss of $286,705.

14.  COMMITMENTS AND CONTINGENCIES:

  LITIGATION

     The Company is involved in legal actions arising in the ordinary course of
business. Management does not believe the outcome of such legal actions will
have a material adverse effect on the Company's financial position or results of
operations.

  INSURANCE

     The Company carries a broad range of insurance coverage, including general
and business auto liability, commercial property, workers' compensation and a
general umbrella policy. The Company has not incurred significant claims or
losses in excess of insurance recoveries.

  EMPLOYMENT AGREEMENTS

     The Company has employment agreements with its executive officers, the
terms of which expire at various times through October 2001. Such agreements
provide for minimum salary levels, adjusted annually for cost-of-living changes,
as well as for incentive bonuses that are payable if specified management goals
are attained. The aggregate commitment for future salaries at December 31, 1997,
excluding bonuses, was approximately $4,400,000.

15.  ACQUISITIONS:

     Effective July 1, 1996, the Company acquired all outstanding shares of TE&C
in exchange for 65,000 shares of Company stock valued at $4.44 per share.
Additional consideration given for TE&C included assumption of outstanding
liabilities by the Company. The combination was accounted for using the purchase
method. The total purchase price of approximately $1,206,000 resulted in
$689,000 of goodwill which is being amortized over 40 years using the
straight-line method. The Company also signed an employment agreement with
TE&C's sole stockholder that includes the right to additional shares of the
Company's common stock based on continued employment with the Company. For the
years ended December 31, 1996 and 1997, $18,315 and $24,420, respectively, of
compensation expense was recognized by the Company in relation to 11,000
additional shares to be issued under this agreement. TE&C's sole stockholder
also received commissions based on the gross billings of TE&C through December
31, 1997, and these amounts were accounted for as compensation expense in the
period earned.

     Effective October 17, 1996, the Company acquired all outstanding shares of
RPM for approximately $1,859,000 in cash and stock warrants for 525,386 shares
of the Company's stock at $6.50 per share. The

                                      F-36
<PAGE>
                  PETROCON ENGINEERING, INC., AND SUBSIDIARIES
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

combination was accounted for using the purchase method and resulted in
approximately $1,843,556 of goodwill that is being amortized over 40 years using
the straight-line method. The warrants have an exercise price of $6.50 and an
exercise period from October 17, 1996, through October 17, 2003. RPM's
stockholders will receive additional compensation based on the earnings of RPM
through December 31, 2001. The additional compensation will be accounted for as
additional goodwill to be amortized over the remaining goodwill amortization
period when the required earnings levels are achieved. The Company also signed
three- and five-year employment agreements with two of RPM's stockholders. As of
December 31, 1997, approximately $955,781 of additional consideration had been
earned and accounted for as additional goodwill.

     Effective February 1, 1997, a wholly owned subsidiary of the Company merged
with AEI in exchange for cash of $4,500,000 and 536,943 shares of Company stock
valued at $7.82 per share. The combination was accounted for using the purchase
method, and the total purchase price of $8,700,000 resulted in approximately
$6,266,000 of goodwill, which is being amortized over 40 years using the
straight-line method. The Company also signed four-year employment agreements
with certain of the former officers of AEI.

     The results of operations of companies acquired are included in the
accompanying consolidated statements of income from their respective acquisition
dates.

     The following unaudited pro forma consolidated results of operations assume
that the purchase of AEI occurred on January 1, 1997 and that the purchases of
RPM and TE&C occurred on January 1, 1996:
<TABLE>
<CAPTION>
                                                        EARNINGS (LOSS)
                                                        FROM CONTINUING     NET INCOME
                                          REVENUE          OPERATIONS         (LOSS)
                                       --------------   ----------------    -----------
<S>                                    <C>                 <C>              <C>        
1997:
     Petrocon as reported............  $   92,616,378      $2,754,812       $ 2,754,812
     AEI.............................         954,980          56,584            56,854
                                       --------------   ----------------    -----------
          Pro Forma..................  $   93,571,358      $2,811,666       $ 2,811,666
                                       ==============   ================    ===========
1996:
     Petrocon as reported............  $   61,850,638      $1,464,998       $ 1,464,998
     AEI.............................      14,068,660       1,088,748         1,088,748
     RPM.............................      13,826,582         531,424           531,424
     TE&C............................       2,738,911        (567,427)         (567,427)
                                       --------------   ----------------    -----------
          Pro Forma..................  $   92,484,791      $2,517,743       $ 2,517,743
                                       ==============   ================    ===========
</TABLE>
     The pro forma financial information may not necessarily be indicative of
the Company's results of operations that would have occurred had the
transactions been effected on the assumed dates, nor do the pro forma results
purport to indicate the Company's results of operations for any future period.

16.  EXPORT SALES:

     Export sales were approximately $13,100,000, $15,500,000 and $24,100,000
for the years ended December 31, 1995, 1996 and 1997, respectively. Such sales
were in South America, Europe, Africa and the Middle East and the Far East.

                                      F-37
<PAGE>
                  PETROCON ENGINEERING, INC., AND SUBSIDIARIES
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

17.  EVENTS SUBSEQUENT TO THE DATE OF THE REPORT OF INDEPENDENT PUBLIC
     ACCOUNTANTS (UNAUDITED):

     In April 1998, the Company and its stockholders entered into a definitive
agreement with OEI providing for the acquisition of the Company by OEI.

     Concurrently with the acquisition, the Company will enter into agreements
with PEI Investments to lease land and buildings used in the Company's
operations for a negotiated amount and term.

                                      F-38

<PAGE>
                    REPORT OF INDEPENDENT PUBLIC ACCOUNTANTS

To the Partners of
Petrocon Arabia Limited:

     We have audited the accompanying balance sheets of Petrocon Arabia Limited
(a Saudi limited liability company) as of December 31, 1996 and 1997, and the
related statements of income, changes in partners' equity and cash flows for
each of the three years in the period ended December 31, 1997 and the notes from
1 to 14 which are an integral part of these financial statements which were
prepared by the Company's management and presented to us together with all the
information and explanations which we requested. We express our opinion on these
financial statements based on our audits and on the information and explanations
we obtained which we considered necessary for the purpose of our audits.
   
     We conducted our audits in accordance with United States generally accepted
auditing standards. Those standards require that we plan and perform the audits
to obtain reasonable assurance about whether the financial statements are free
of material misstatement. An audit includes examining, on a test basis, evidence
supporting the amounts and disclosures in the financial statements. An audit
also includes assessing the accounting principles used and significant estimates
made by management, as well as evaluating the overall financial statement
presentation. We believe that our audits provide a reasonable basis for our
opinion.
    
     In our opinion, the financial statements referred to above present fairly,
in all material respects, the financial position of Petrocon Arabia Limited as
of December 31, 1996 and 1997, and the results of its operations and its cash
flows for each of the three years in the period ended December 31, 1997, based
on the presentation and disclosure of the information included in the financial
statements and in conformity with generally accepted accounting principles as
summarized in Note 2.

ARTHUR ANDERSEN & CO.
Al Khobar, Saudi Arabia
May 27, 1998

                                      F-39
<PAGE>
                            PETROCON ARABIA LIMITED
                                 BALANCE SHEETS
                                 (SAUDI RIYALS)
                                                 DECEMBER 31,
                                          --------------------------
                                              1996          1997
                                          ------------  ------------
                 ASSETS
CURRENT ASSETS:
     Cash and cash equivalents..........       212,914       476,003
     Accounts receivable, net...........     9,251,412    21,304,269
     Prepayments and other
      receivables.......................     5,818,774     2,420,202
     Retentions receivable..............     2,533,040     3,700,168
                                          ------------  ------------
          Total current assets..........    17,816,140    27,900,642
PARTICIPATION IN CONSORTIUM.............     2,314,267     2,313,453
PROPERTY AND EQUIPMENT, net.............     5,675,855     6,761,823
OTHER ASSETS............................       375,000       --
                                          ------------  ------------
          Total assets..................    26,181,262    36,975,918
                                          ============  ============

    LIABILITIES AND PARTNERS' EQUITY
CURRENT LIABILITIES:
     Due to banks.......................     3,937,200     7,414,639
     Accounts payable and accrued
      expenses..........................     2,863,875     4,831,427
     Payable to related parties.........       149,825       892,509
     Provision for zakat and income
      tax...............................       478,748     3,184,957
     Payable to consortium..............       213,204       --
                                          ------------  ------------
          Total current liabilities.....     7,642,852    16,323,532
END OF SERVICE BENEFITS.................       389,060       881,372
                                          ------------  ------------
          Total liabilities.............     8,031,912    17,204,904
                                          ------------  ------------
PARTNERS' EQUITY:
     Capital............................     1,000,000     1,000,000
     Statutory reserve..................       500,000       500,000
     Retained earnings..................    16,649,350    18,271,014
                                          ------------  ------------
          Total partners' equity........    18,149,350    19,771,014
                                          ------------  ------------
                                            26,181,262    36,975,918
                                          ============  ============

   The accompanying notes are an integral part of these financial statements.

                                      F-40
<PAGE>
                            PETROCON ARABIA LIMITED
                              STATEMENTS OF INCOME
                                 (SAUDI RIYALS)
<TABLE>
<CAPTION>
                                                  YEAR ENDED DECEMBER 31,
                                       ----------------------------------------------
                                            1995            1996            1997
                                       --------------  --------------  --------------
<S>                                        <C>             <C>             <C>       
CONTRACT REVENUE.....................      34,449,403      30,538,186      61,412,354
OPERATING COSTS......................     (27,847,230)    (24,172,824)    (41,764,575)
                                       --------------  --------------  --------------
          Income from operations.....       6,602,173       6,365,362      19,647,779
GENERAL AND ADMINISTRATIVE
  EXPENSES...........................      (7,410,412)     (6,007,337)     (8,763,868)
FINANCE CHARGES......................        (601,545)       (397,225)       (445,709)
INCOME FROM A CONSORTIUM.............       7,770,334       1,364,097          69,184
OTHER INCOME (EXPENSES), net.........         190,432         218,388         (42,569)
                                       --------------  --------------  --------------
          Net income before zakat and
          income tax.................       6,550,982       1,543,285      10,464,817
PROVISION FOR ZAKAT AND INCOME TAX...      (1,765,233)       (538,760)     (3,218,153)
                                       --------------  --------------  --------------
          Net income for the year....       4,785,749       1,004,525       7,246,664
                                       ==============  ==============  ==============
</TABLE>
   The accompanying notes are an integral part of these financial statements.

                                      F-41
<PAGE>
                            PETROCON ARABIA LIMITED
                   STATEMENTS OF CHANGES IN PARTNERS' EQUITY
                                 (SAUDI RIYALS)
<TABLE>
<CAPTION>
                                              1995          1996          1997
                                          ------------  ------------  ------------
<S>                                          <C>           <C>           <C>      
CAPITAL.................................     1,000,000     1,000,000     1,000,000
                                          ------------  ------------  ------------
STATUTORY RESERVE.......................       500,000       500,000       500,000
                                          ------------  ------------  ------------
RETAINED EARNINGS:
     Beginning of the year..............    20,609,076    21,287,715    16,649,350
     Net income for the year............     4,785,749     1,004,525     7,246,664
     Distribution to partners...........    (4,107,110)   (5,642,890)   (5,625,000)
                                          ------------  ------------  ------------
     End of the year....................    21,287,715    16,649,350    18,271,014
                                          ------------  ------------  ------------
          Total partners' equity........    22,787,715    18,149,350    19,771,014
                                          ============  ============  ============
</TABLE>
   The accompanying notes are an integral part of these financial statements.

                                      F-42
<PAGE>
                            PETROCON ARABIA LIMITED
                            STATEMENTS OF CASH FLOWS
                                 (SAUDI RIYALS)
<TABLE>
<CAPTION>
                                                  YEAR ENDED DECEMBER 31,
                                       ----------------------------------------------
                                            1995            1996            1997
                                       --------------  --------------  --------------
<S>                                         <C>             <C>            <C>       
CASH FLOWS FROM OPERATING ACTIVITIES:
  Net income before zakat and income
     tax.............................       6,550,982       1,543,285      10,464,817
  Adjustment to reconcile net income
     to net cash provided by
     operating activities --
       Depreciation..................       1,280,117       1,318,273       1,568,323
       End of service benefits.......        (269,112)         (8,567)        492,312
       Income tax and zakat paid.....      (2,125,479)     (1,709,790)       (511,944)
       Gain on disposal of fixed
       assets........................        (190,432)       (170,157)        (26,555)
       Income from a consortium......      (7,770,334)     (1,364,097)        (69,186)
       Profits distribution from
       consortium....................       9,000,000      11,964,500          70,000
  Changes in --
       Accounts receivable...........       3,560,589      (3,991,749)    (12,052,857)
       Retentions receivable.........      (1,595,455)      2,474,724      (1,167,128)
       Prepaid expenses and other
       receivables...................         112,537      (3,321,979)      3,398,572
       Accounts payable and accrued
          liabilities................         199,540        (328,017)      1,967,552
       Payable to related parties....         537,485      (1,321,052)        742,684
                                       --------------  --------------  --------------
          Net cash provided by
          operating activities.......       9,290,438       5,085,374       4,876,590
                                       --------------  --------------  --------------
CASH FLOWS FROM INVESTING ACTIVITIES:
  Changes in payables to a
  consortium.........................       4,109,970      (1,921,989)       (213,204)
  Purchase of property and
     equipment.......................      (2,552,752)     (1,005,352)     (2,675,268)
  (Increase) decrease in other
  assets.............................        --              (375,000)        375,000
  Proceeds from sale of property and
     equipment.......................         190,432         198,650          47,532
                                       --------------  --------------  --------------
          Net cash provided (used) by
          investing activities.......       1,747,650      (3,103,691)     (2,465,940)
                                       --------------  --------------  --------------
CASH FLOWS FROM FINANCING ACTIVITIES:
  Increase in due to banks...........      (7,933,823)      3,694,276       3,477,439
  Dividend distributions.............      (3,178,555)     (5,642,890)     (5,625,000)
                                       --------------  --------------  --------------
          Net cash used by financing
             activities..............     (11,112,378)     (1,948,614)     (2,147,561)
                                       --------------  --------------  --------------
NET INCREASE (DECREASE) IN CASH AND
  CASH EQUIVALENTS...................         (74,290)         33,069         263,089
                                       --------------  --------------  --------------
CASH AND CASH EQUIVALENTS BEGINNING
  OF YEAR............................         254,135         179,845         212,914
                                       --------------  --------------  --------------
CASH AND CASH EQUIVALENTS END OF THE
  YEAR...............................         179,845         212,914         476,003
                                       ==============  ==============  ==============
</TABLE>
   The accompanying notes are an integral part of these financial statements.

                                      F-43
<PAGE>
                            PETROCON ARABIA LIMITED
                         NOTES TO FINANCIAL STATEMENTS
                                 (SAUDI RIYALS)

1.  GENERAL:

     Petrocon Arabia Limited is a limited liability company operating in the
Kingdom of Saudi Arabia under commercial registration no. 2051005348 dated
October 23, 1979 (2 Dhu Al-Hijjah 1399H). The partners of the Company are
Petrocon Engineering, Inc. (PEI), a US company and Fahad Al Tamimi, a Saudi
businessman. The Company formed a new branch in Abu Dhabi in the year 1996. The
attached financial statements include all transactions relating to the Company's
head office and its branch in Abu Dhabi from the date when the branch commenced
its commercial operations on January 1, 1997.

     The objectives of the Company are to manage the construction of petroleum
and gas pipelines and associated facilities.

2.  SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES:
   
     The financial statements are prepared in accordance with generally accepted
accounting principles in the Kingdom of Saudi Arabia. The generally accepted
accounting principles in the Kingdom of Saudi Arabia are substantially similar
to the United States generally accepted accounting principles. The following is
a summary of the Company's significant accounting policies:
    
  PROPERTY AND EQUIPMENT

     Property and equipment are stated at cost, net of accumulated depreciation.
Depreciation is computed using the straight-line method over the estimated
useful lives of the assets at the following annual percentage rates, which are
the rates specified by the Saudi Arabian Department of Zakat and Income Tax:

Office equipment.....................    10%-25%
Furniture and fixtures...............      10%
Motor vehicles.......................      25%

  ZAKAT AND INCOME TAX

     The Company is subject to Saudi Arabian income taxes computed on income
attributable to the non-Saudi shareholder. The Company is also subject to a
zakat assessment attributable to the Saudi shareholder. Such income taxes and
zakat are expensed by the company.

  END OF SERVICE BENEFITS

     Benefits payable to the Company's staff at the end of their services are
provided for in accordance with the guidelines set by the Saudi Arabian Labour
Law, and the Company's policy is to fund such benefits annually as earned.

  REVENUE RECOGNITION

     Contract revenue is recognized as services are performed.

  PARTICIPATION IN CONSORTIUM

     The Company accounts for its 50% participation in a consortium using the
equity method of accounting. Income from a consortium represents 50% of the
consortium's results of operations for the respective periods.

  TRANSLATION OF FOREIGN CURRENCIES

     The accompanying financial statements are denominated in Saudi Riyals.
Appropriate exchange rates have been used to translate transactions or balances
denominated in other currencies. Exchange gains or losses are recorded in the
statement of income.

                                      F-44
<PAGE>
                            PETROCON ARABIA LIMITED
                  NOTES TO FINANCIAL STATEMENTS -- (CONTINUED)

  SUPPLEMENTAL CASH FLOW INFORMATION

     The Company paid financial charges of SR 601,545, SR 397,225 and SR 445,709
during the years ended December 31, 1995, 1996 and 1997, respectively.

3.  PREPAYMENTS AND OTHER RECEIVABLES:

     Prepayments and other receivables comprised the following at December 31,
1996 and 1997:

                                             1996         1997
                                          -----------  -----------
Prepaid expenses........................    2,984,351    2,015,369
Other receivables.......................    1,896,923      197,158
Advances to suppliers...................      937,500      207,675
                                          -----------  -----------
                                            5,818,774    2,420,202
                                          ===========  ===========

     Included in 1996 other receivables is an amount of SR 1,488,142
representing advances made on account of forming a branch in Abu Dhabi.

4.  RETENTIONS RECEIVABLE:

     The Company is required to present its final income tax and zakat clearance
certificate to its customers in order to collect the retentions receivable
outstanding at December 31, 1997. The Company expects to obtain such certificate
and to collect the retentions receivable during 1998.

5.  PARTICIPATION IN CONSORTIUM:

     The Company entered into a consortium with Bugshan S&W Company Limited
(BSW), a Saudi Arabian company, on August 8, 1987, for the purpose of executing
a contract with Saudi Aramco for construction technical support services. This
contract expired on March 31, 1996, and the consortium ceased operations on that
date. As a result, the consortium's partners have decided to dissolve the
consortium upon completion of contractual formalities and collection of
retentions receivable, which are expected to take place during 1998. Under the
consortium agreement, the Company and BSW equally share the consortium's results
of operations.

     Summarized financial information for the consortium at December 31, 1995,
1996 and 1997, and for the years then ended is as follows:

                                            1995           1996         1997
                                       --------------  ------------  -----------
At December 31 --
     Total assets....................      28,330,942     4,628,534    4,626,906
     Liabilities.....................       2,501,602       --           --
     Participants' equity............      25,829,340     4,628,534    4,626,906
                                       --------------  ------------  -----------
Total liabilities and participants'
  equity.............................      28,330,942     4,628,534    4,626,906
                                       ==============  ============  ===========
For the years ended December 31 --
     Revenue.........................      82,497,480    11,651,865      138,368
     Expense.........................     (66,956,812)   (8,923,671)     --
                                       --------------  ------------  -----------
Net income...........................      15,540,668     2,728,194      138,368
                                       ==============  ============  ===========

                                      F-45
<PAGE>
                            PETROCON ARABIA LIMITED
                  NOTES TO FINANCIAL STATEMENTS -- (CONTINUED)

6.  PROPERTY AND EQUIPMENT, NET:

     Property and equipment comprised the following at December 31, 1996 and
1997:
<TABLE>
<CAPTION>
                                                                      1997
                                          1996      ----------------------------------------
                                        NET BOOK                   ACCUMULATED    NET BOOK
                                          VALUE         COST       DEPRECIATION     VALUE
                                       -----------  ------------   -----------   -----------
<S>                                        <C>         <C>          <C>            <C>      
Motor vehicles.......................      655,801     3,047,899    1,621,908      1,425,991
Housing assets.......................    1,097,874     2,134,035    1,025,133      1,108,902
Office assets........................    3,922,180     7,571,656    3,344,726      4,226,930
                                       -----------  ------------   -----------   -----------
                                         5,675,855    12,753,590    5,991,767      6,761,823
                                       ===========  ============   ===========   ===========
</TABLE>

     Depreciation was SR 1,318,273 and SR 1,568,323 for the years ended December
31, 1996 and 1997, respectively.

7.  DUE TO BANKS:

     The Company has an overdraft facility with a commercial bank with a credit
limit of SR 7.5 million. The facility is collateralized by the retentions
receivable from Saudi Aramco and future collection of revenues from contracts
with Saudi Aramco. The outstanding balance amounted to SR 7,414,639 as of
December 31, 1997, (1996: SR 3,937,200). The facility is subject to interest at
a rate averaging 11.25 percent per annum during 1997 (1996: 11.75 percent per
annum) and is guaranteed by each of the Company's partners proportionate to
their ownership of the Company's capital.

8.  ACCOUNTS PAYABLE AND ACCRUED EXPENSES:

     Account payable and accrued expenses comprised the following at December
31, 1996 and 1997:

                                          1996         1997
                                       -----------  -----------
Trade payables.......................    2,085,434    2,067,312
Accrued expenses.....................      778,441    2,764,115
                                       -----------  -----------
                                         2,863,875    4,831,427
                                       ===========  ===========

9.  PAYABLE TO RELATED PARTIES

     Payable to related parties comprised the following at December 31, 1996 and
1997:

                                         1996       1997
                                       ---------  ---------
Fahad Al Tamimi......................     --        937,500
Petrocon Engineering, Inc............    149,825    (44,991)
                                       ---------  ---------
                                         149,825    892,509
                                       =========  =========

10.  CAPITAL:

     The Company's capital at December 31, 1996 and 1997, consists of 10,000
shares of SR 100 each fully paid and held as follows:

                                        NUMBER OF
                                          SHARES       AMOUNT
                                        ----------    ---------
Fahad Al Tamimi......................      5,000        500,000
Petrocon Engineering, Inc............      5,000        500,000
                                        ----------    ---------
                                          10,000      1,000,000
                                        ==========    =========

                                      F-46
<PAGE>
                            PETROCON ARABIA LIMITED
                  NOTES TO FINANCIAL STATEMENTS -- (CONTINUED)

11.  STATUTORY RESERVE:

     In accordance with Saudi Arabian Companies Law and the Company's Articles
of Incorporation, 10 percent of the annual net income is required to be
transferred to a statutory reserve until this reserve equals 50 percent of the
capital. This limit was attained in the previous years and, accordingly, no
further transfer has been made to this reserve. This reserve is not available
for dividend distribution.

12.  LEASES:

     The Company has various operating leases for office space, employees'
housing and equipment which generally have a term of one year. Rental expense
for 1997 was SR 4,790,075 (1996: SR 3,851,667; 1995: SR 6,182,565).

13.  CONTINGENCIES:

     The Company was contingently liable in respect of bank guarantees totaling
SR 2,566,158 at December 31, 1997 (SR 141,308 at December 31, 1996).

14.  RECLASSIFICATIONS:

     Certain reclassifications have been made to the prior years' financial
statements to conform to the classifications used in 1997.

                                      F-47
<PAGE>
                    REPORT OF INDEPENDENT PUBLIC ACCOUNTANTS

To Paulus, Sokolowski and Sartor, Inc.:

     We have audited the accompanying balance sheets of Paulus, Sokolowski and
Sartor, Inc. (a New Jersey corporation) as of December 31, 1996 and 1997 and the
related statements of income, shareholders' equity and cash flows for each of
the three years in the period ended December 31, 1997. These financial
statements are the responsibility of the Company's management. Our
responsibility is to express an opinion on these financial statements based on
our audits.

     We conducted our audits in accordance with generally accepted auditing
standards. Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements are free of material
misstatement. An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements. An audit also includes
assessing the accounting principles used and significant estimates made by
management, as well as evaluating the overall financial statement presentation.
We believe that our audits provide a reasonable basis for our opinion.

     In our opinion, the financial statements referred to above present fairly,
in all material respects, the financial position of Paulus, Sokolowski and
Sartor, Inc. as of December 31, 1996 and 1997, and the results of its operations
and its cash flows for each of the three years in the period ended December 31,
1997 in conformity with generally accepted accounting principles.

ARTHUR ANDERSEN LLP

Houston, Texas
May 8, 1998

                                      F-48
<PAGE>
                      PAULUS, SOKOLOWSKI AND SARTOR, INC.
                                 BALANCE SHEETS
<TABLE>
<CAPTION>
                                                DECEMBER 31,
                                       ------------------------------    MARCH 31,
                                            1996            1997            1998
                                       --------------  --------------  --------------
                                                                        (UNAUDITED)
<S>                                    <C>             <C>             <C>           
               ASSETS
CURRENT ASSETS
     Cash and cash equivalents.......  $      102,531  $       96,247  $      121,560
     Trade receivables, net..........       4,807,538       5,172,513       5,896,808
     Costs and estimated earnings in
       excess of billings on
       uncompleted contracts.........       2,369,097       2,817,853       3,409,436
     Prepaid expenses................         111,527         159,266         328,669
                                       --------------  --------------  --------------
          Total current assets.......       7,390,693       8,245,879       9,756,473
                                       --------------  --------------  --------------
PROPERTY AND EQUIPMENT, net..........         733,729         611,235         590,276
DEFERRED TAX ASSET...................          73,364          54,800          54,800
OTHER ASSETS:
     Cash surrender value of life
       insurance.....................       1,446,781       1,698,299       1,752,378
     Intangible assets...............         500,000         500,000         458,333
     Other receivables...............          99,228         103,961         147,432
                                       --------------  --------------  --------------
          Total other assets.........       2,046,009       2,302,260       2,358,143
                                       --------------  --------------  --------------
          Total assets...............  $   10,243,795  $   11,214,174  $   12,759,692
                                       ==============  ==============  ==============
LIABILITIES AND SHAREHOLDERS' EQUITY
CURRENT LIABILITIES:
     Note payable....................  $      960,000  $      950,000  $    2,590,000
     Current portion of long-term
       debt..........................         116,181          82,076          62,908
     Accounts payable................       1,200,391       1,618,440       1,175,350
     Accrued compensation and
       benefits......................       1,495,357       1,505,958       1,097,887
     Other liabilities...............          60,570          38,450          88,968
     Deferred income taxes...........         589,562         667,768         736,742
     Due to affiliate................          88,000        --              --
     Billings in excess of costs and
       estimated earnings
       on uncompleted contracts......         110,846        --              --
                                       --------------  --------------  --------------
          Total current
             liabilities.............       4,620,907       4,862,692       5,751,855
LONG-TERM LIABILITIES:
     Long-term debt, net of current
       maturities....................         599,688         546,522         554,540
                                       --------------  --------------  --------------
          Total liabilities..........       5,220,595       5,409,214       6,306,395
                                       --------------  --------------  --------------
COMMITMENTS AND CONTINGENCIES
SHAREHOLDERS' EQUITY:
     Common stock, no par value,
       50,000 shares authorized;
       31,176, 31,076 and 31,076
       shares outstanding,
       respectively..................       1,023,969       1,005,169       1,005,169
     Retained earnings...............       4,971,038       5,748,195       6,395,273
     Shareholder note receivable.....        (403,329)       (379,926)       (378,667)
     Treasury Stock, 4,833 common
       shares........................        (568,478)       (568,478)       (568,478)
                                       --------------  --------------  --------------
          Total shareholders'
             equity..................       5,023,200       5,804,960       6,453,297
                                       --------------  --------------  --------------
          Total liabilities and
             shareholders' equity....  $   10,243,795  $   11,214,174  $   12,759,692
                                       ==============  ==============  ==============
</TABLE>
   The accompanying notes are an integral part of these financial statements.

                                      F-49
<PAGE>
                      PAULUS, SOKOLOWSKI AND SARTOR, INC.
                              STATEMENTS OF INCOME
<TABLE>
<CAPTION>
                                                                                    THREE MONTHS ENDED
                                               YEAR ENDED DECEMBER 31,                  MARCH 31,
                                       ----------------------------------------  ------------------------
                                           1995          1996          1997         1997         1998
                                       ------------  ------------  ------------  -----------  -----------
                                                                                       (UNAUDITED)
<S>                                    <C>           <C>           <C>           <C>          <C>        
REVENUES.............................  $ 18,706,643  $ 20,514,995  $ 21,675,092  $ 5,358,988  $ 5,898,774
DIRECT COSTS.........................     8,974,302     9,395,908     9,730,641    2,411,155    2,469,129
                                       ------------  ------------  ------------  -----------  -----------
    Gross profit.....................     9,732,341    11,119,087    11,944,451    2,947,833    3,429,645
GENERAL AND ADMINISTRATIVE
  EXPENSES...........................     9,384,957    10,454,943    10,787,390    2,678,852    2,654,933
                                       ------------  ------------  ------------  -----------  -----------
    Income from operations...........       347,384       664,144     1,157,061      268,981      774,712
OTHER INCOME (EXPENSE)
    Interest expense, net............      (190,308)     (149,889)     (208,359)     (52,089)     (58,660)
    Other............................         8,445           358       (74,775)     (18,694)     --
                                       ------------  ------------  ------------  -----------  -----------
    Income from continuing operations
      before income taxes............       165,521       514,613       873,927      198,198      716,052
PROVISION (BENEFIT) FOR INCOME TAX...        25,124        56,339        96,770       47,137       68,974
                                       ------------  ------------  ------------  -----------  -----------
    Income before Extraordinary
      Item...........................       140,397       458,274       777,157      151,061      647,078
EXTRAORDINARY ITEM
    Gain on forgiveness of debt (net
      of applicable income tax of
      $101,205)......................     1,023,295       --            --           --           --
                                       ------------  ------------  ------------  -----------  -----------
NET INCOME...........................  $  1,163,692  $    458,274  $    777,157  $   151,061  $   647,078
                                       ============  ============  ============  ===========  ===========
</TABLE>
   The accompanying notes are an integral part of these financial statements.

                                      F-50
<PAGE>
                      PAULUS, SOKOLOWSKI AND SARTOR, INC.
                       STATEMENTS OF SHAREHOLDERS' EQUITY
<TABLE>
<CAPTION>
                                                                    NOTES
                                            COMMON STOCK         RECEIVABLE--                    TREASURY STOCK          TOTAL
                                        --------------------        COMMON        RETAINED     ------------------    SHAREHOLDERS'
                                        SHARES      AMOUNT          STOCK         EARNINGS     SHARES     AMOUNT        EQUITY
                                        -------    ---------    --------------    ---------    ------    --------    -------------
<S>                                     <C>        <C>            <C>             <C>                                  <C>       
BALANCE, January 1, 1995.............   31,176     $1,023,969     $ (420,839)     $3,444,072     --         --         $4,047,202
Payments on notes receivable.........     --          --              10,921         --          --         --            10,921
Purchase of common stock.............     --          --             --              --        (4,833)   (568,478)      (568,478)
Net income...........................     --          --             --           1,163,692      --         --         1,163,692
                                        -------    ---------    --------------    ---------    ------    --------    -------------
BALANCE, December 31, 1995...........   31,176     1,023,969        (409,918)     4,607,764    (4,833)   (568,478)     4,653,337
Dividends............................     --          --             --             (95,000)     --         --           (95,000)
Payments on notes receivable.........     --          --               6,589         --          --         --             6,589
Net income...........................     --          --             --             458,274      --         --           458,274
                                        -------    ---------    --------------    ---------    ------    --------    -------------
BALANCE, December 31, 1996...........   31,176     1,023,969        (403,329)     4,971,038    (4,833)   (568,478)     5,023,200
Cancellation of notes................     (100)      (18,800)         18,800         --          --         --           --
Payments on notes receivable.........     --          --               4,603         --          --         --             4,603
Net income...........................     --          --             --             777,157      --         --           777,157
                                        -------    ---------    --------------    ---------    ------    --------    -------------
BALANCE, December 31, 1997...........   31,076     1,005,169        (379,926)     5,748,195    (4,833)   (568,478)     5,804,960
Payments on notes receivable
  (unaudited)........................     --          --               1,259         --          --         --             1,259
Net income (unaudited)...............     --          --             --             647,078      --         --           647,078
                                        -------    ---------    --------------    ---------    ------    --------    -------------
BALANCE, March 31, 1998
  (unaudited)........................   31,076     $1,005,169     $ (378,667)     $6,395,273   (4,833)   (568,478)     $6,453,297
                                        =======    =========    ==============    =========    ======    ========    =============
</TABLE>
   The accompanying notes are an integral part of these financial statements.

                                      F-51
<PAGE>
                      PAULUS, SOKOLOWSKI AND SARTOR, INC.
                            STATEMENTS OF CASH FLOWS
<TABLE>
<CAPTION>
                                                                                   THREE MONTHS
                                                                                       ENDED
                                             YEAR ENDED DECEMBER 31,                 MARCH 31,
                                       ------------------------------------  -------------------------
                                           1995         1996        1997        1997          1998
                                       ------------  ----------  ----------  -----------  ------------
                                                                                    (UNAUDITED)
<S>                                    <C>           <C>         <C>         <C>          <C>         
CASH FLOWS FROM OPERATING ACTIVITIES:
    Net income.......................  $  1,163,692  $  458,274  $  777,157  $   151,061  $    647,078
    Adjustments to reconcile net
      income to net cash provided by
      operating activities
         Depreciation and
           amortization..............       116,368     146,518     162,463       13,628        70,696
         Provision for losses on
           trade receivables.........       (35,333)     34,953     148,849      --            --
         Deferred tax asset..........       (65,379)     (7,986)     18,564      --            --
         Deferred income taxes.......       191,708      64,325      78,206          978        68,974
         Gain on forgiveness of
           debt......................    (1,124,500)     --          --          --            --
         (Loss) on sale of property
           and equipment.............        (8,445)     --          74,775      --            --
         Changes in assets and
           liabilities --
           (Increase) decrease in --
         Trade receivable............       389,505     (44,515)   (513,824)     554,691      (724,295)
         Costs and estimated earnings
           in excess of billings on
           uncompleted jobs..........      (164,897)        257    (448,756)    (837,971)     (591,583)
         Prepaid expenses............       (24,442)    (63,098)    (47,739)     (11,038)     (169,403)
         Cash surrender value of life
           insurance.................      (166,636)    (38,533)   (251,518)     (29,069)      (54,079)
         Intangible asset............      (500,000)     --          --                        --
         Other receivables...........       (20,492)    (39,460)     (4,733)    (397,630)      (43,471)
           Increase (decrease) in --
         Accounts payable............       738,665     (80,657)    418,049      680,737      (443,090)
         Accrued compensation and
           benefits..................       143,807    (435,282)     10,601     (524,632)     (408,071)
         Other liabilities...........                    44,418     (22,120)       8,880        50,518
         Billings in excess of costs
           and estimated earnings on
           uncompleted jobs..........       --          110,846    (110,846)    (110,846)      --
                                       ------------  ----------  ----------  -----------  ------------
             Net cash provided by
               operating
               activities............       633,621     150,060     289,128     (501,211)   (1,596,726)
                                       ------------  ----------  ----------  -----------  ------------
CASH FLOWS FROM INVESTING ACTIVITIES:
    Proceeds from the sale of
      property and equipment.........        23,685      --          34,679      --            --
    Purchase of property and
      equipment......................      (439,355)   (147,519)   (149,423)     --             (8,070)
                                       ------------  ----------  ----------  -----------  ------------
             Net cash used in
               investing
               activities............      (415,670)   (147,519)   (114,744)     --             (8,070)
                                       ------------  ----------  ----------  -----------  ------------
CASH FLOWS FROM FINANCING ACTIVITIES:
    Note payable.....................      (150,000)    360,000     (10,000)     740,000     1,640,000
    Dividends paid...................       --          (95,000)     --          --            --
    Repayment of long-term debt......      (188,018)   (307,299)    (87,271)      65,605       (11,150)
    Proceeds from Shareholder notes
      receivable.....................        10,921       6,589      23,403      403,329         1,259
    (Reductions) Proceeds from
      long-term debt.................       197,659      --          --
    Retirement of common stock.......       (85,272)     --         (18,800)
    Due from Affiliates..............       --           --         (88,000)     (88,000)      --
                                       ------------  ----------  ----------  -----------  ------------
             Net cash provided by
               (used in) financing
               activities............      (214,710)    (35,710)   (180,668)   1,120,934     1,630,109
                                       ------------  ----------  ----------  -----------  ------------
NET INCREASE (DECREASE) IN CASH......         3,241     (33,169)     (6,284)     619,723        25,313
CASH AND CASH EQUIVALENTS BEGINNING
  OF YEAR............................       132,459     135,700     102,531      102,531        96,247
                                       ------------  ----------  ----------  -----------  ------------
CASH AND CASH EQUIVALENTS END OF
  YEAR...............................  $    135,700  $  102,531  $   96,247  $   722,254  $    121,560
                                       ============  ==========  ==========  ===========  ============
</TABLE>
   The accompanying notes are an integral part of these financial statements.

                                      F-52
<PAGE>
                      PAULUS, SOKOLOWSKI AND SARTOR, INC.
                            STATEMENTS OF CASH FLOWS
<TABLE>
<CAPTION>
                                                                            THREE MONTHS
                                                                               ENDED
                                           YEAR ENDED DECEMBER 31,           MARCH 31,
                                       -------------------------------  --------------------
                                         1995       1996       1997       1997       1998
                                       ---------  ---------  ---------  ---------  ---------
<S>                                      <C>        <C>        <C>         <C>        <C>   
SUPPLEMENTAL CASH FLOW INFORMATION:
     Cash paid during the year for --
          Interest...................    202,715    165,590    224,549     33,290     44,529
</TABLE>
   The accompanying notes are an integral part of these financial statements.

                                      F-53
<PAGE>
                      PAULUS, SOKOLOWSKI AND SARTOR, INC.
                         NOTES TO FINANCIAL STATEMENTS

1.  SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

    BUSINESS ACTIVITY

     Paulus, Sokolowski and Sartor, Inc. (a New Jersey Corporation) provides
comprehensive consulting engineering services, including studies, reports, and
design and field inspections, in the areas of structural engineering, civil
engineering, mechanical and electrical engineering (including HVAC systems),
geology, geophysics, foundation design, site selection, environmental studies,
earth and rock structures, soil and foundation, air quality control, water
quality control, noise control, and solid waste disposal. The Company conducts
its business predominantly in New Jersey and New York.

     The Company and its shareholders intend to enter into a definitive
agreement with OEI International, Inc. ("OEI") pursuant to which all
outstanding shares of the Company's common stock will be exchanged for cash and
shares of OEI common stock concurrently with the consummation of the initial
public offering (the "Offering") of the common stock of OEI.

  INTERIM FINANCIAL INFORMATION

     The interim financial statements as of March 31, 1998, and for the three
months ended March 31, 1997 and 1998, are unaudited, and certain information and
footnote disclosures, normally included in financial statements prepared in
accordance with generally accepted accounting principles, have been omitted. In
the opinion of management, all adjustments, consisting only of normal recurring
adjustments, necessary to fairly present the financial position, results of
operations and cash flows with respect to the interim financial statements, have
been included. The results of operations for the interim periods are not
necessarily indicative of the results for the entire fiscal year.

  PROPERTY AND EQUIPMENT

     Property and equipment are stated at cost. Depreciation and amortization
are computed using the straight-line and accelerated methods over the estimated
useful lives of the assets.

     Leasehold improvements are capitalized and amortized over the lesser of the
life of the lease or the estimated useful life of the asset.

     Expenditures for repairs and maintenance are charged to expense when
incurred. Expenditures for major renewals and betterments, which extend the
useful lives of existing equipment, are capitalized and depreciated. Upon
retirement or disposition of property and equipment, the cost and related
accumulated depreciation are removed from the accounts and any resulting gain or
loss is recognized in the statement of operations.

     The Company has adopted Statement of Financial Accounting Standards (SFAS)
No. 121, "Accounting for the Impairment of Long-Lived Assets and for Long-Lived
Assets to Be Disposed Of." Accordingly, in the event that facts and
circumstances indicate that property and equipment may be impaired, an
evaluation of recoverability would be performed. If an evaluation is required,
the estimated future undiscounted cash flows associated with the asset is
compared to the asset's carrying amount to determine if a write-down to market
value is necessary. Adoption of this standard did not have a material effect on
the financial position or results of operations of the Company.

  REVENUE RECOGNITION

     The Company provides a majority of its services through cost-plus-markup
contracts. Revenues are recognized to the extent of billable rates times hours
delivered plus materials expense incurred. Fixed priced contracts represent
approximately 26.0, 19.7 and 24.8 percent of the Company's revenues in 1995,
1996 and 1997 respectively. Revenue on fixed priced contracts is accrued through
the recognition of projected revenues and costs on a percentage-of-completion
basis. Methods used to measure percentage of completion consist of labor hours
or costs incurred compared to total estimated labor hours or costs or other
appropriate

                                      F-54
<PAGE>
                      PAULUS, SOKOLOWSKI AND SARTOR, INC.
                  NOTES TO FINANCIAL STATEMENTS -- (CONTINUED)

bases of measurement. Revisions in revenue and cost projections are recorded in
the period in which the facts which require the revision become known. When
estimates of projected revenues and costs indicate a loss, the total estimated
loss is accrued. Contract performance incentives are included in income when
earned. Potential additional revenues on projects from claims and unapproved
change orders are not recognized until amounts may be reliably estimated and
realization is virtually certain. The asset "Costs and estimated profits in
excess of billings on uncompleted contracts" represents revenues recognized in
excess of amounts billed. The liability "Billings in excess of costs and
estimated earnings on uncompleted contracts" represents amounts billed in
excess of revenues recognized.

  FAIR VALUES OF FINANCIAL INSTRUMENTS

     The Company enters into various types of financial instruments in the
normal course of business. The Company does not hold or issue financial
instruments for trading purposes nor does it hold interest rate, leveraged or
other types of derivative financial instruments. The carrying amounts of the
Company's financial instruments approximate their fair values.

  INCOME TAXES

     The Company has elected S Corporation status as defined by the Internal
Revenue Code, whereby the Company is not subject to taxation for federal
purposes. The Company will terminate its S Corporation status concurrent with
the effective date of the offering. Under S Corporation status, the shareholders
report their shares of the Company's taxable earnings or losses in their
personal tax returns.

     Deferred income taxes reflect temporary differences between financial
reporting and state income tax reporting of revenues and expenses. The principal
differences arise from the reporting of income and expenses under the accrual
method of accounting for financial statement purposes versus the modified
accrual method for income tax purposes. These deferred taxes are classified in
the balance sheet as current.

  USE OF ESTIMATES

     The preparation of financial statements in conformity with generally
accepted accounting principles requires management to make estimates and
assumptions that affect the reported amounts of assets and liabilities and
disclosures of contingent assets and liabilities at the date of the financial
statements and the reported amounts of revenues and expenses during the period.
Actual results could differ from those estimates.

2.  PROPERTY AND EQUIPMENT:

     Property and equipment consist of the following:
<TABLE>
<CAPTION>
                                         ESTIMATED USEFUL
                                          LIVES IN YEARS         1996            1997
                                        ------------------  --------------  --------------
<S>                                            <C>          <C>             <C>           
Furniture and fixtures...............          5-10         $      339,441  $      352,617
Field and laboratory equipment.......          5-7                 323,948         351,996
Vehicles.............................          3-5                 635,192         390,059
Leasehold improvements...............          5-39                785,845         813,858
                                                            --------------  --------------
                                                                 2,084,426       1,908,530
Less -- Accumulated depreciation.....                            1,350,697       1,297,295
                                                            --------------  --------------
     Property and equipment, net.....                       $      733,729  $      611,235
                                                            ==============  ==============
</TABLE>
                                      F-55
<PAGE>
                      PAULUS, SOKOLOWSKI AND SARTOR, INC.
                  NOTES TO FINANCIAL STATEMENTS -- (CONTINUED)

3.  DETAIL OF CERTAIN BALANCE SHEET ACCOUNTS:

     Activity in the Company's allowance for doubtful accounts consists of the
following:

                                                  DECEMBER 31,
                                       ----------------------------------
                                          1995        1996        1997
                                       ----------  ----------  ----------
Balance at beginning of year.........  $  689,580  $  654,247  $  689,198
Additions to costs and expenses......     348,868     188,404     148,849
Deductions for uncollectible
  receivables written off and
  recoveries.........................    (464,611)   (153,453)   (463,325)
                                       ----------  ----------  ----------
                                       $  654,247  $  689,198  $  374,722
                                       ==========  ==========  ==========

     The status of contracts in progress is as follows:

                                                DECEMBER 31,
                                       ------------------------------
                                            1996            1997
                                       --------------  --------------
Costs incurred on contracts in
  progress...........................  $   24,874,548  $   27,117,851
Estimated earnings, net of losses....       4,413,139       5,846,913
                                       --------------  --------------
                                           29,287,687      32,964,764
Less Billings to date................      26,918,590      30,146,911
                                       --------------  --------------
                                       $    2,369,097  $    2,817,853
                                       ==============  ==============
Costs and estimated earnings in
  excess of billings on uncompleted
  contracts..........................  $    2,479,943  $    2,817,853
Billings in excess of costs and
  estimated earnings on uncompleted
  contracts..........................        (110,846)       --
                                       --------------  --------------
                                       $    2,369,097  $    2,817,853
                                       ==============  ==============

4.  DEBT:

  LINE OF CREDIT

     The Company has a revolving line of credit of $2,000,000 in 1996 and
$3,000,000 in 1997 of which 1,040,000 and 2,050,000 was unused at December 31,
1996 and 1997, respectively. The line of credit expires July 31, 1998 and is
payable in monthly installments of interest only on the outstanding balance, at
the bank's prime rate. On December 31, 1997 the interest rate was 8.5%. This
obligation is secured by all of the assets of the Company and is personally
guaranteed by certain shareholders.

                                      F-56
<PAGE>
                      PAULUS, SOKOLOWSKI AND SARTOR, INC.
                  NOTES TO FINANCIAL STATEMENTS -- (CONTINUED)

     Long-term debt consists of the following:

                                          1996        1997
                                       ----------  ----------
Otokar Von Bradsky, a former
shareholder, note payable in
quarterly installments of interest
only at 7.93% per annum through
January 1, 1999. Thereafter quarterly
self-liquidating payments of $29,501
inclusive of interest at 7.93% per
annum until maturity on January 1,
2004. This note was issued in
connection with the repurchase of
4,833 shares of Company stock for
$568,478.............................  $  483,206  $  483,206
Installment notes payable
collateralized by certain Company
vehicles having a net book value of
$124,267 at December 31, 1997. As of
December 31, 1997 the notes are
payable in monthly installments
through April, 2000 ranging from $617
to $4,284 inclusive of interest at
rates ranging from 5.9% to 8.75%.....     213,437     145,392
Robert Bloch, note payable in
quarterly installments of $6,457,
plus interest at 9% per annum,
through October 1997.................      19,226      --
                                       ----------  ----------
                                          715,869     628,598
Less, current portion................     116,181      82,076
                                       ----------  ----------
                                       $  599,688  $  546,522
                                       ==========  ==========

     Principal payments for the next five years are scheduled as follows:

1998.................................  $   82,076
1999.................................     108,575
2000.................................     103,207
2001.................................      94,181
2002.................................     101,874
Thereafter...........................     138,685
                                       ----------
                                       $  628,598
                                       ==========

     The Company paid interest of $100,688, $64,252 and $67,784 related to debt
for the years ended December 31, 1995, 1996 and 1997, respectively.

5.  INCOME TAXES

     Federal and state income taxes are as follows:

                                           YEAR ENDED DECEMBER 31,
                                       -------------------------------
                                         1995       1996       1997
                                       ---------  ---------  ---------
Federal --
     Current.........................  $  --      $  --      $  --
     Deferred........................     --         --         --
State --
     Current.........................       (300)    --         --
     Deferred........................     25,424     56,339     96,770
                                       ---------  ---------  ---------
                                       $  25,124  $  56,339  $  96,770
                                       =========  =========  =========

                                      F-57
<PAGE>
                      PAULUS, SOKOLOWSKI AND SARTOR, INC.
                  NOTES TO FINANCIAL STATEMENTS -- (CONTINUED)

     Actual income tax expense differs from income tax expense computed by
applying the state statutory corporate rate of 9 percent to income before income
taxes as follows:

                                                DECEMBER 31,
                                       -------------------------------
                                         1995       1996       1997
                                       ---------  ---------  ---------
Provision at the statutory rate......  $  14,897  $  46,315  $  78,653
Increase resulting from --
  Permanent differences..............     10,227     10,024     18,117
                                       ---------  ---------  ---------
Provision for income tax.............     25,124     56,339     96,770
                                       =========  =========  =========

     Deferred income tax provisions result from temporary differences in the
recognition of income and expenses for financial reporting purposes and for tax
purposes. The tax effects of these temporary differences, representing deferred
tax assets and liabilities, result principally from the following:

                                              DECEMBER 31,
                                       --------------------------
                                           1996          1997
                                       ------------  ------------
Trade receivable, net................  $   (432,678) $   (465,573)
Costs and estimated earnings in
  excess of billings on uncompleted
  contracts..........................      (177,151)     (253,607)
Prepaid expenses and other
  receivables........................        30,677       (66,500)
Other................................       (58,246)       25,470
Accounts payable and accrued
  compensation and benefits..........        47,836        92,442
Net operating loss carryforwards.....        73,364        54,800
                                       ------------  ------------
Net deferred tax liability...........  $   (516,198) $   (612,968)
                                       ============  ============

     The net deferred tax assets and liabilities are comprised of the following:

                                              DECEMBER 31,
                                       --------------------------
                                           1996          1997
                                       ------------  ------------
Deferred tax assets --
     Current.........................  $     47,595  $     78,737
     Long-term.......................        73,364        54,800
                                       ------------  ------------
          Total......................       120,959       133,537
                                       ============  ============
Deferred tax liabilities --
     Current.........................       637,157       746,505
     Long-term.......................       --            --
                                       ------------  ------------
          Total......................       637,157       746,505
                                       ============  ============
     Net deferred income tax
       liability.....................  $   (516,198) $   (612,968)
                                       ============  ============

     At December 31, 1997, the Company had net operating loss carryforwards
which expire as follows:

1998.................................  $  544,000
2001.................................      61,800

6.  RELATED PARTY TRANSACTIONS

     Notes receivable common stock represent notes due from four shareholders in
connection with their purchase of 2,066 shares of common stock effective January
1, 1994. The notes are collateralized by the issued shares of stock and require
annual interest payments at 5% through December 15, 2002, at which time the
entire outstanding principal balance and any accrued interest is due. One
shareholder has elected to prepay his note through equal bi-weekly payments of
principal and interest until fully satisfied in January

                                      F-58
<PAGE>
                      PAULUS, SOKOLOWSKI AND SARTOR, INC.
                  NOTES TO FINANCIAL STATEMENTS -- (CONTINUED)

1998. Interest receivable on these notes is $20,825, $21,601 and $15,711 for
years ended December 31, 1995, 1996 and 1997.

     The Company leases office space from Mountain Boulevard I, Mountain
Boulevard II, and Mountain Boulevard III. Rentals paid under these leases were
$1,544,357, $1,592,100 and $1,626,449 for 1995, 1996 and 1997, respectively.

     The Company leases equipment from PSF Leasing Company. Rentals paid under
these leases were $307,803, $228,930 and $231,597 for 1995, 1996 and 1997,
respectively.

     During 1995, 1996 and 1997, the Company provided services to Paulus,
Sokolowski & Sartor Engineering, P.C., an affiliate. Included in contract
revenues for the years ending December 31, 1995, 1996 and 1997 was $1,072,415,
$3,977,109 and $4,710,308, respectively. At December 31, 1996, and 1997,
included in accounts receivable was $606,994 and $1,936,169, respectively, for
these services. In addition, $69,000 of management fee income was received
during the year ended December 31, 1997 from this entity, which is included in
revenues.

     In December, 1991, a shareholder loaned the Company $200,000 which was
repaid in March 1996. Interest expense for 1995 at 7% per annum amounted to
$14,000.

     In April, 1992, a related entity loaned the Company $88,000, which was
repaid in December 1997. Interest expense for years 1995, 1996 and 1997, was
$7,040, $7,040 and $25,374, respectively.

     During 1995, 1996 and 1997 the wife of a shareholder provided advertising
and promotional services to the Company, in the amounts of $39,898, $58,722 and
$101,082, respectively.

7.  SIGNIFICANT CUSTOMERS AND VENDORS:

     Significant customers and vendors are those that account for greater than
10% of the Company's revenues and expenses, respectively. For the years ended
December 31, 1996 and 1997, one customer accounted for 10% and 11%,
respectively, of the Company's revenues. Receivables outstanding from this
customer represented $122,828 and $1,409,729 of the Company's trade receivables
at December 31, 1996 and 1997 respectively. For the year ended December 31,
1995, there was not a significant customer.

     During the year ended December 31, 1995, 1996 and 1997, there were no
significant vendors.

8.  COMMITMENTS AND CONTINGENCIES

  LITIGATION

     The Company is involved in legal actions arising in the ordinary course of
business. Management does not believe the outcome of such legal actions will
have a material adverse effect on the Company's financial position or results of
operations.

  INSURANCE

     The Company carries a broad range of insurance coverage, including general
and business auto liability, commercial property, worker's compensation and a
general umbrella policy. The Company has not incurred significant claims or
losses on any of its insurance policies.

  LEASES

     The Company is the lessee under three long-term building leases and various
equipment leases with related entities. The controlling interests of the lessors
are the same as the controlling interests of the Company.

     On December 31, 1995, the Company entered into new building leases with its
related lessors which reflect current market conditions and expire in 2011 and
2017. In addition to base rents the leases require the Company to pay all
operating costs plus real estate tax increases over base year amounts pertaining
to the buildings. In connection with the previously existing leases, the lessors
forgave rents due in the amount

                                      F-59
<PAGE>
                      PAULUS, SOKOLOWSKI AND SARTOR, INC.
                  NOTES TO FINANCIAL STATEMENTS -- (CONTINUED)

of $1,124,500 in 1995. Furthermore, the lessors reduced the 1995 total base rent
from $2,065,616 to $1,371,532. The Company predominantly leases the buildings
for their offices and subleases certain space to third parties.

     The equipment leases expire in various years through 2001 and require
monthly rent based upon the current prime rate plus six percentage points as
adjusted by Summit Bank.

     The following is a summary of rental expense of all operating leases:

                                           1995          1996          1997
                                       ------------  ------------  ------------
Rentals to related parties...........  $  1,679,524  $  1,821,030  $  1,858,046
Other rentals........................        50,774        92,380        99,416
                                       ------------  ------------  ------------
                                          1,730,298     1,913,410     1,957,462
Less: Sublease rentals...............      (431,179)     (462,705)     (448,712)
                                       ------------  ------------  ------------
               Total rent expense....  $  1,299,119  $  1,450,705  $  1,508,750
                                       ============  ============  ============

     The following is a schedule of noncancellable minimum rental payments under
all operating leases in excess of one year as of December 31, 1997:

                                                      RENTAL
                                   RENTAL EXPENSE     INCOME       NET AMOUNT
                                   --------------  ------------  --------------
1998.............................  $    1,847,278  $    392,259  $    1,455,019
1999.............................       1,808,046       420,701       1,387,345
2000.............................       1,708,596       425,126       1,283,470
2001.............................       1,682,191       415,741       1,266,450
2002.............................       1,660,724        35,101       1,625,623
Thereafter.......................      21,413,383         2,925      21,410,458
                                   --------------  ------------  --------------
                                   $   30,120,218  $  1,691,853  $   28,428,365
                                   ==============  ============  ==============

     In addition to the above, the Company has a month-to-month sublease for
approximately $8,400 per month.

  EMPLOYMENT ARRANGEMENT

     The Company is committed to pay a former employee $125,000 per year for
four years effective March 31, 1995 for a total of $500,000. The employee's
services were terminated on December 31, 1997. During 1997 and 1996, the Company
paid $125,000, with respect to this obligation which has been classified as a
deferred expense on the balance sheet.

  GUARANTEES

     The Company guarantees a $500,000 line of credit for PSF Leasing Company,
an entity related through common ownership. The outstanding balance at December
31, 1997 was $370,564.

9.  EMPLOYEE BENEFIT PLANS

     The Company sponsors a profit-sharing 401k plan covering substantially all
employees. The plan provides for discretionary contributions by the Company, as
determined by the Board of Directors. Total contributions by the Company under
this plan were approximately $600,000, $118,382 and $119,463 during 1995, 1996
and 1997, respectively. Amounts due to this plan were approximately $600,000,
$118,382 and $119,463 for the years ended December 31, 1995, 1996 and 1997,
respectively.

10.  EXPORT SALES

     Export sales were approximately $65,000 and $60,000 for the years ended
December 31, 1996 and 1997, respectively. Such sales were in South America and
Europe. There were no export sales in 1995.

                                      F-60
<PAGE>
                      PAULUS, SOKOLOWSKI AND SARTOR, INC.
                  NOTES TO FINANCIAL STATEMENTS -- (CONTINUED)

11.  SUBSEQUENT EVENTS (UNAUDITED):

     In April 1998, the Company and its stockholders entered into a definitive
agreement with OEI providing for the acquisition of the Company by OEI.

     Concurrently with the acquisition, the Company will enter into agreements
with the shareholders to lease land and buildings used in the Company's
operations for a negotiated amount and term.

     For the three months ended March 31, 1998, notes payable increased
approximately $1.6 million for anticipated payments of payroll taxes and trade
payables currently due.

                                      F-61
<PAGE>
                    REPORT OF INDEPENDENT PUBLIC ACCOUNTANTS

To Gulsby Engineering, Inc.:

     We have audited the accompanying consolidated balance sheets of Gulsby
Engineering, Inc. (a Texas corporation), and its subsidiary, Gulsby
International Engineers, Limited, as of December 31, 1996 and 1997, and the
related consolidated statements of income, stockholders' equity (deficit) and
cash flows for each of the three years in the period ended December 31, 1997.
These consolidated financial statements are the responsibility of the Company's
management. Our responsibility is to express an opinion on these consolidated
financial statements based on our audits.

     We conducted our audits in accordance with generally accepted auditing
standards. Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the consolidated financial statements are
free of material misstatement. An audit includes examining, on a test basis,
evidence supporting the amounts and disclosures in the financial statements. An
audit also includes assessing the accounting principles used and significant
estimates made by management, as well as evaluating the overall financial
statement presentation. We believe that our audits provide a reasonable basis
for our opinion.

     In our opinion, the consolidated financial statements referred to above
present fairly, in all material respects, the financial position of Gulsby
Engineering, Inc., and its subsidiary as of December 31, 1996 and 1997, and the
results of their operations and their cash flows for each of the three years in
the period ended December 31, 1997, in conformity with generally accepted
accounting principles.

ARTHUR ANDERSEN LLP

Houston, Texas
February 20, 1998

                                      F-62
<PAGE>
                    GULSBY ENGINEERING, INC., AND SUBSIDIARY
                          CONSOLIDATED BALANCE SHEETS
<TABLE>
<CAPTION>
                                              DECEMBER 31,
                                       --------------------------    MARCH 31,
                                           1996          1997           1998
                                       ------------  ------------  --------------
                                                                    (UNAUDITED)
<S>                                    <C>           <C>           <C>           
               ASSETS
CURRENT ASSETS:
     Cash and cash equivalents.......  $  1,357,173  $    603,390  $      507,960
     Receivables --
          Trade receivables..........       321,122       278,405         870,023
          Other receivables..........        15,761        27,821          27,015
          Advances to stockholder....     2,650,585     3,120,571       3,095,880
Costs and estimated profits in excess
  of billings on uncompleted
  contracts..........................       646,283     4,210,372       4,683,853
Prepaid expenses and other...........        43,367       154,292         139,771
                                       ------------  ------------  --------------
          Total current assets.......     5,034,291     8,394,851       9,324,502
PROPERTY AND EQUIPMENT, net..........       547,375       539,490         523,923
DEFERRED TAX ASSET...................       933,686       949,602       1,073,962
OTHER ASSETS.........................        10,221         3,736           3,552
                                       ------------  ------------  --------------
          Total assets...............  $  6,525,573  $  9,887,679  $   10,925,939
                                       ============  ============  ==============
LIABILITIES AND STOCKHOLDERS' EQUITY
              (DEFICIT)
LIABILITIES:
     Accounts payable................  $    211,483  $    501,683  $      301,668
     Accrued compensation and
       benefits......................       125,092        13,309          30,522
     Accrued liabilities.............        29,803        73,218          73,218
     Accrued legal judgment..........     3,200,741     3,520,815       3,608,835
     Notes payable...................        29,831        66,300       1,027,414
     Billings in excess of costs and
       estimated profits on
       uncompleted contracts.........     2,733,859       422,588         418,339
     Income taxes payable............       502,505     1,763,826       1,900,190
                                       ------------  ------------  --------------
          Total liabilities..........     6,833,314     6,361,739       7,360,186
COMMITMENTS AND CONTINGENCIES
STOCKHOLDERS' EQUITY (DEFICIT):
     Common stock, $1 par; 1,000,000
       shares authorized, 10,000
       shares outstanding............        10,000        10,000          10,000
     Retained earnings (deficit).....      (317,741)    3,515,940       3,555,753
                                       ------------  ------------  --------------
          Total stockholders' equity
             (deficit)...............      (307,741)    3,525,940       3,565,753
                                       ------------  ------------  --------------
          Total liabilities and
             stockholders' equity
             (deficit)...............  $  6,525,573  $  9,887,679  $   10,925,939
                                       ============  ============  ==============
</TABLE>
  The accompanying notes are an integral part of these consolidated financial
                                  statements.

                                      F-63
<PAGE>
                    GULSBY ENGINEERING, INC., AND SUBSIDIARY
                       CONSOLIDATED STATEMENTS OF INCOME
<TABLE>
<CAPTION>
                                                                                      THREE MONTHS
                                                                                         ENDED
                                               YEAR ENDED DECEMBER 31,                 MARCH 31,
                                       ---------------------------------------  ------------------------
                                          1995          1996          1997         1997         1998
                                       -----------  ------------  ------------  -----------  -----------
                                                                                      (UNAUDITED)
<S>                                    <C>          <C>           <C>           <C>          <C>        
REVENUES.............................  $ 3,165,447  $ 20,285,341  $ 18,264,303  $ 1,515,397  $ 1,523,594
DIRECT COSTS.........................    2,324,980    17,451,222    11,768,322    1,167,228    1,187,963
                                       -----------  ------------  ------------  -----------  -----------
    Gross profit.....................      840,467     2,834,119     6,495,981      348,169      335,631
GENERAL AND ADMINISTRATIVE
  EXPENSES...........................      633,296       849,868       927,357      278,450      183,893
                                       -----------  ------------  ------------  -----------  -----------
    Income from operations...........      207,171     1,984,251     5,568,624       69,719      151,738
OTHER INCOME (EXPENSE):
    Interest expense, net............     (299,245)     (193,915)     (233,066)     (60,349)     (93,665)
    Other............................       33,645         7,733        56,919       10,347      --
                                       -----------  ------------  ------------  -----------  -----------
         Total.......................     (265,600)     (186,182)     (176,147)     (50,002)     (93,665)
                                       -----------  ------------  ------------  -----------  -----------
         Income (loss) before income
           taxes.....................      (58,429)    1,798,069     5,392,477       19,717       58,073
PROVISION (BENEFIT) FOR INCOME
  TAXES..............................      (21,003)      529,127     1,558,796        5,612       18,260
                                       -----------  ------------  ------------  -----------  -----------
NET INCOME (LOSS)....................  $   (37,426) $  1,268,942  $  3,833,681  $    14,105  $    39,813
                                       ===========  ============  ============  ===========  ===========
</TABLE>
  The accompanying notes are an integral part of these consolidated financial
                                  statements.

                                      F-64
<PAGE>
                    GULSBY ENGINEERING, INC., AND SUBSIDIARY
           CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (DEFICIT)
<TABLE>
<CAPTION>
                                                                                  TOTAL
                                          COMMON STOCK         RETAINED       STOCKHOLDERS'
                                        -----------------      EARNINGS          EQUITY
                                        SHARES    AMOUNT      (DEFICIT)         (DEFICIT)
                                        ------    -------   --------------    -------------
<S>                                     <C>       <C>       <C>                <C>          
BALANCE, December 31, 1994...........   10,000    $10,000   $   (1,549,257)    $ (1,539,257)
     Net loss........................     --        --             (37,426)         (37,426)
                                        ------    -------   --------------    -------------
BALANCE, December 31, 1995...........   10,000     10,000       (1,586,683)      (1,576,683)
     Net income......................     --        --           1,268,942        1,268,942
                                        ------    -------   --------------    -------------
BALANCE, December 31, 1996...........   10,000     10,000         (317,741)        (307,741)
     Net income......................     --        --           3,833,681        3,833,681
                                        ------    -------   --------------    -------------
BALANCE, December 31, 1997...........   10,000     10,000        3,515,940        3,525,940
     Net income (unaudited)..........     --        --              39,813           39,813
                                        ------    -------   --------------    -------------
BALANCE, March 31, 1998
  (unaudited)........................   10,000    $10,000   $    3,555,753     $  3,565,753
                                        ======    =======   ==============    =============
</TABLE>
  The accompanying notes are an integral part of these consolidated financial
                                  statements.

                                      F-65
<PAGE>
                    GULSBY ENGINEERING, INC., AND SUBSIDIARY
                     CONSOLIDATED STATEMENTS OF CASH FLOWS
<TABLE>
<CAPTION>
                                                                                    THREE MONTHS
                                                                                       ENDED
                                              YEAR ENDED DECEMBER 31,                MARCH 31,
                                       -------------------------------------  ------------------------
                                          1995         1996         1997         1997         1998
                                       -----------  -----------  -----------  -----------  -----------
                                                                                    (UNAUDITED)
<S>                                    <C>          <C>          <C>          <C>          <C>        
CASH FLOWS FROM OPERATING ACTIVITIES:
  Net income.........................  $   (37,426) $ 1,268,942  $ 3,833,681  $    14,105  $    39,813
  Adjustments to reconcile net income
    to net cash provided by (used in)
    operating activities-
    Depreciation and amortization....       97,740       97,959       95,612       24,542       23,251
    Deferred tax asset...............      (64,758)     (72,884)     (15,916)      (3,977)    (124,360)
    Changes in assets and
      liabilities-
      (Increase) decrease in-
         Trade receivables...........       31,880     (311,725)      42,717   (1,040,180)    (591,618)
         Other receivables...........      (15,271)      13,065      (12,060)      (6,845)         806
         Advances to stockholder.....     (889,343)  (1,227,303)    (469,986)    (391,010)      24,691
         Costs and estimated profits
           in excess of billings on
           uncompleted contracts.....      --          (646,283)  (3,564,089)     (39,037)    (473,481)
         Prepaid expenses and
           other.....................      (95,581)      56,101     (110,925)      14,586       14,521
         Other assets................       (6,003)      (4,425)       5,750      --           --
      Increase (decrease) in-
         Accounts payable............     (503,885)      35,100      290,200      100,709     (200,015)
         Accrued compensation and
           benefits..................      (32,029)      85,098     (111,783)     (58,060)      17,213
         Accrued liabilities.........       (4,559)        (392)      43,415       (1,646)     --
         Accrued legal judgment......      264,525      290,975      320,074       80,018       88,020
         Billings in excess of costs
           and estimated profits on
           uncompleted contracts.....    5,057,079   (2,547,484)  (2,311,271)     919,910       (4,249)
         Income taxes payable........       60,168      612,116    1,261,321       11,157      136,364
                                       -----------  -----------  -----------  -----------  -----------
    Net cash provided by (used in)
      operating activities...........    3,862,537   (2,351,140)    (703,260)    (375,728)  (1,049,044)
                                       -----------  -----------  -----------  -----------  -----------
CASH FLOWS FROM INVESTING ACTIVITIES:
  Purchase of property and
    equipment........................      (63,720)     (28,138)     (86,992)      (2,695)      (7,500)
                                       -----------  -----------  -----------  -----------  -----------
    Net cash used in investing
      activities.....................      (63,720)     (28,138)     (86,992)      (2,695)      (7,500)
                                       -----------  -----------  -----------  -----------  -----------
CASH FLOWS FROM FINANCING ACTIVITIES:
  Proceeds from issuance of notes
    payable..........................      338,116       53,655      112,367      --         1,002,592
  Principal payments on notes
    payable..........................     (277,627)    (176,510)     (75,898)     (17,955)     (41,478)
                                       -----------  -----------  -----------  -----------  -----------
    Net cash provided by (used in)
      financing activities...........       60,489     (122,855)      36,469      (17,955)     961,114
                                       -----------  -----------  -----------  -----------  -----------
NET INCREASE (DECREASE) IN CASH AND
  CASH EQUIVALENTS...................    3,859,306   (2,502,133)    (753,783)    (396,378)     (95,430)
CASH AND CASH EQUIVALENTS, beginning
  of year............................      --         3,859,306    1,357,173    1,357,173      603,390
                                       -----------  -----------  -----------  -----------  -----------
CASH AND CASH EQUIVALENTS, end of
  year...............................  $ 3,859,306  $ 1,357,173  $   603,390  $   960,795  $   507,960
                                       ===========  ===========  ===========  ===========  ===========
SUPPLEMENTAL CASH FLOW INFORMATION:
  Cash paid during the year for-
    Interest.........................  $    72,465  $    60,192  $     2,434  $    19,669  $     4,020
    Income taxes.....................        2,180        6,434      321,412      --             6,255
</TABLE>
  The accompanying notes are an integral part of these consolidated financial
                                  statements.

                                      F-66
<PAGE>
                    GULSBY ENGINEERING, INC., AND SUBSIDIARY
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

1.  SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES:

  BUSINESS ACTIVITY

     Gulsby Engineering, Inc. (the Company), a Texas corporation, and its
subsidiary, Gulsby International Engineers, Limited (a U.S. Virgin Islands
Foreign Sales Corporation), are engineering, systems and construction management
contractors, servicing industrial customers with primary focus in the process
industries--oil, chemical and petrochemical products. The Company has operated
primarily in the domestic markets of Texas, Louisiana, Oklahoma and New Mexico.
The Company focus in 1996 and 1997 has changed to the foreign market (98% and
94% of revenues for 1996 and 1997, respectively).

     The Company and its stockholders intend to enter into a definitive
agreement with OEI International, Inc. (OEI), pursuant to which all outstanding
shares of the Company's common stock will be exchanged for cash and shares of
OEI common stock concurrent with the consummation of the initial public offering
(the Offering) of the common stock of OEI.

  PRINCIPLES OF CONSOLIDATION

     The consolidated financial statements include the accounts of the Company
and its subsidiary. All significant intercompany transactions and balances have
been eliminated.

  INTERIM FINANCIAL INFORMATION

     The interim financial statements as of March 31, 1998, and for the three
months ended March 31, 1997 and 1998, are unaudited, and certain information and
footnote disclosures, normally included in financial statements prepared in
accordance with generally accepted accounting principles, have been omitted. In
the opinion of management, all adjustments, consisting only of normal recurring
adjustments, necessary to fairly present the financial position, results of
operations and cash flows with respect to the interim financial statements, have
been included. The results of operations for the interim periods are not
necessarily indicative of the results for the entire year.

  REVENUE RECOGNITION

     The Company provides a majority of its services through fixed-price
contracts. Revenue on fixed-price contracts is recognized on the
percentage-of-completion method measured by the percentage of costs incurred to
total estimated costs for each contract. Revisions in revenue and cost
projections are recorded in the period in which the facts requiring the revision
become known. When estimates of projected revenues and costs indicate a loss,
the total estimated loss is accrued. Potential additional revenues on projects
from claims and unapproved change orders are not recognized until amounts may be
reliably estimated and realization is virtually certain. The asset "Costs and
estimated profits in excess of billings on uncompleted contracts" represents
revenues recognized in excess of amounts billed. The liability "Billings in
excess of costs and estimated profits on uncompleted contracts" represents
amounts billed in excess of revenues recognized.

  CASH AND CASH EQUIVALENTS

     Cash and cash equivalents include certificates of deposit with maturities
of three months or less.

  PROPERTY AND EQUIPMENT

     Property and equipment are stated at cost, and depreciation is computed
using the straight-line method over the estimated useful lives of the assets.
Leasehold improvements are capitalized and amortized over the lesser of the life
of the lease or the estimated useful life of the asset.

     Expenditures for repairs and maintenance are charged to expense when
incurred. Expenditures for major renewals and betterments, which extend the
useful lives of existing equipment, are capitalized and

                                      F-67
<PAGE>
                    GULSBY ENGINEERING, INC., AND SUBSIDIARY
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

depreciated. Upon retirement or disposition of property and equipment, the cost
and related accumulated depreciation are removed from the accounts and any
resulting gain or loss is recognized in the statements of income.

     The Company has adopted Statement of Financial Accounting Standards (SFAS)
No. 121, "Accounting for the Impairment of Long-Lived Assets and for Long-Lived
Assets to Be Disposed Of." Accordingly, in the event that facts and
circumstances indicate that property and equipment may be impaired, an
evaluation of recoverability would be performed. If an evaluation is required,
the estimated future undiscounted cash flows associated with the asset is
compared to the asset's carrying amount to determine if a write-down to market
value is necessary. Adoption of this standard did not have a material effect on
the financial position or results of operations of the Company.

  INCOME TAX

     The Company follows the liability method of accounting for income taxes in
accordance with SFAS No. 109. Under this method, deferred income taxes are
recorded based upon the differences between the financial reporting and tax
bases of assets and liabilities and are measured using the enacted tax rates and
laws that will be in effect when the underlying assets or liabilities are
recovered or settled.

  FAIR VALUES OF FINANCIAL INSTRUMENTS

     The Company enters into various types of financial instruments in the
normal course of business. The Company does not hold or issue financial
instruments for trading purposes, nor does it hold interest rate, leveraged or
other types of derivative financial instruments. The carrying amounts of the
Company's financial instruments approximate their fair values.

  USE OF ESTIMATES

     The preparation of the Company's financial statements in conformity with
generally accepted accounting principles, particularly in the use of the
percentage-of-completion method of accounting, requires management to make
estimates and assumptions that affect the reported amounts of assets and
liabilities and disclosures of contingent assets and liabilities at the date of
the financial statements and the reported amounts of revenues and expenses
during the reporting period. Actual results could differ from those estimates.

2.  PROPERTY AND EQUIPMENT:

     Property and equipment consist of the following:
<TABLE>
<CAPTION>
                                                                   DECEMBER 31,
                                         ESTIMATED USEFUL   --------------------------
                                          LIVES IN YEARS        1996          1997
                                        ------------------  ------------  ------------
<S>                                     <C>                 <C>           <C>         
Land.................................                       $    214,775  $    214,775
Equipment............................          5-22              472,383       475,567
Buildings............................        15-16.5           1,019,987     1,019,987
Leasehold improvements...............        15-16.5             464,650       523,980
Furniture and fixtures...............          5-10              552,452       576,930
                                                            ------------  ------------
                                                               2,724,247     2,811,239
Less- Accumulated depreciation.......                          2,176,872     2,271,749
                                                            ------------  ------------
     Property and equipment, net.....                       $    547,375  $    539,490
                                                            ============  ============
</TABLE>
                                      F-68
<PAGE>
                    GULSBY ENGINEERING, INC., AND SUBSIDIARY
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

3.  CONTRACTS IN PROGRESS:

     The status of contracts in progress is as follows:

                                                DECEMBER 31,
                                       ------------------------------
                                            1996            1997
                                       --------------  --------------
Costs incurred on contracts in
  progress...........................  $   26,536,894  $   30,522,573
Estimated earnings, net of losses....       5,999,206      10,487,443
                                       --------------  --------------
                                           32,536,100      41,010,016
Less -- Billings to date.............      34,623,676      37,222,232
                                       --------------  --------------
                                       $   (2,087,576) $    3,787,784
                                       ==============  ==============
Costs and estimated profits in excess
  of billings on uncompleted
  contracts..........................  $      646,283  $    4,210,372
Billings in excess of costs and
  estimated profits on uncompleted
  contracts..........................      (2,733,859)       (422,588)
                                       --------------  --------------
                                       $   (2,087,576) $    3,787,784
                                       ==============  ==============

4.  DEBT:

     Current debt consists of the following:

                                           DECEMBER 31,
                                       --------------------
                                         1996       1997
                                       ---------  ---------
Note payable to a bank, interest at
  7.69%, maturing May 9, 1997........  $  29,831  $  --
Note payable to a finance company,
  interest at 7.16%, maturing May 9,
  1998...............................     --         66,300
                                       ---------  ---------
                                       $  29,831  $  66,300
                                       =========  =========

     The Company paid interest of $5,192 and $2,160 related to debt for the
years ended December 31, 1996 and 1997, respectively.

     On March 6, 1998, the Company entered into a working capital loan agreement
with Sterling Bank in the principal amount of $1,000,000 at 10% interest per
annum. The loan matures the earlier of August 1, 1998 or the closing of the
acquisition of the Company by OEI.

5.  INCOME TAXES:

Provisions (benefits) for federal and state income taxes are as follows:

                                             YEAR ENDED DECEMBER 31,
                                       ------------------------------------
                                          1995        1996         1997
                                       ----------  ----------  ------------
Federal--
     Current.........................  $   38,429  $  539,594  $  1,703,672
     Deferred........................     (56,876)    (74,872)     (144,876)
State--
     Current.........................       5,326      62,415      (128,959)
     Deferred........................      (7,882)      1,990       128,959
                                       ----------  ----------  ------------
                                       $  (21,003) $  529,127  $  1,558,796
                                       ==========  ==========  ============

                                      F-69
<PAGE>
                    GULSBY ENGINEERING, INC., AND SUBSIDIARY
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

     Actual income tax expense differs from income tax expense computed by
applying the U.S. federal statutory corporate rate of 34% to income (loss)
before income taxes as follows:

                                                    DECEMBER 31,
                                       --------------------------------------
                                          1995         1996          1997
                                       ----------  ------------  ------------
Provision (benefit) at the statutory
  rate...............................  $  (19,866) $    611,343  $  1,833,442
Increase (decrease) resulting from--
     Permanent differences...........         550         2,092        19,244
     State income tax, net of federal
       benefit.......................      (1,687)       42,508       --
     Foreign Sales Corporation
       benefit.......................      --          (126,816)     (293,890)
                                       ----------  ------------  ------------
                                       $  (21,003) $    529,127  $  1,558,796
                                       ==========  ============  ============

     Deferred income tax provisions result from temporary differences in the
recognition of income and expenses for financial reporting purposes and for tax
purposes. The tax effects of these temporary differences, representing differed
tax assets and liabilities, result principally from the following:

                                              DECEMBER 31,
                                       --------------------------
                                           1996          1997
                                       ------------  ------------
Accrued legal contingency not
  deducted for tax purposes..........  $  1,232,285  $  1,197,077
State taxes..........................       (43,846)      --
Bases differences on property and
  equipment and capital lease
  accounting.........................         3,358        (4,830)
Other accrued expenses not deducted
  for tax purposes...................      (258,111)     (242,645)
                                       ------------  ------------
     Net deferred tax asset..........  $    933,686  $    949,602
                                       ============  ============

The net deferred tax assets and liabilities are comprised of the following:

                                              DECEMBER 31,
                                       --------------------------
                                           1996          1997
                                       ------------  ------------
Deferred tax assets--
     Current.........................  $    --       $    --
     Long-term.......................     1,176,332     1,192,248
                                       ------------  ------------
          Total......................     1,176,332     1,192,248
                                       ------------  ------------
Deferred tax liabilities--
     Current.........................       --            --
     Long-term.......................       242,646       242,646
                                       ------------  ------------
          Total......................       242,646       242,646
                                       ------------  ------------
          Net deferred income tax
             asset...................  $    933,686  $    949,602
                                       ============  ============

6.  RELATED-PARTY TRANSACTIONS:

     The Company has made noninterest-bearing advances to its stockholder over a
period of several years. The amounts outstanding at December 31, 1996 and 1997,
were $2,650,585 and $3,120,571, respectively. The stockholder has represented
that he has the intent and the ability to repay such advances by December 31,
1998. During 1995, 1996 and 1997, the Company paid interest of $24,108, $55,000
and $274 for loans to the Company which are reflected as an offset to the
stockholder advances. The Company makes various other noninterest-bearing loans
to its employees payable on demand.

     The Company uses a paint facility on the premises which is owned by its
stockholder. The amount of rent not charged to the Company for the use of this
facility is not significant.

7.  SIGNIFICANT CUSTOMERS AND VENDORS:

     Significant customers and vendors are those that account for greater than
10% of the Company's revenues and expenses, respectively. During the year ended
December 31, 1995, one customer accounted

                                      F-70
<PAGE>
                    GULSBY ENGINEERING, INC., AND SUBSIDIARY
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

for 88% of the Company's revenues. No receivables were outstanding for this
customer at December 31, 1995. For the year ended December 31, 1996, two
customers accounted for 71% and 27% of the Company's revenues. Receivables
outstanding at December 31, 1996, for these customers were less than 10%. For
the year ended December 31, 1997, three customers accounted for 65%, 16% and 10%
of the Company's revenues. Receivables outstanding from the largest customer
were 64% of the Company's trade receivables at December 31, 1997. No receivables
were outstanding for the other two significant customers.

     During the years ended December 31, 1995 and 1996, one vendor accounted for
27% and 48%, respectively, of the Company's cost of services. During the year
ended December 31, 1997, no one vendor accounted for greater than 10% of the
Company's cost of services.

8.  COMMITMENTS AND CONTINGENCIES:

  LITIGATION

     The Company and its stockholder were party to a suit in 1989 as defendants
against a customer. The suit sought reimbursement from the Company of amounts
paid by the customer in settlement with another general contractor in a patent
infringement suit. In 1991, a summary judgment against the Company for
approximately $1.6 million plus interest was rendered. The judgment accrues
simple interest at 10% from September 29, 1989, through the date of judgment
(October 21, 1991) and thereafter at the rate of 10% per annum compounded
annually until paid. The accompanying statements of income include accruals of
interest at the stated rate. No payments on the judgment have been made at this
time.

     The Company is involved in various other legal actions arising in the
ordinary course of business. Management does not believe the outcome of such
legal actions will have a material adverse effect on the Company's financial
position or results of operations.

  INSURANCE

     The Company carries a broad range of insurance coverage, including general
and business, auto liability, commercial property, workers' compensation and a
general umbrella policy. The Company has not incurred significant claims or
losses on any of its insurance policies.

  OTHER COMMITMENTS

     The Company contributed $40,152 into a trust during 1996 on behalf of its
employees for a potential profit sharing plan. A plan has not been adopted as of
December 31, 1997.

9.  EXPORT SALES:

     Export sales were approximately $2,800,000, $19,900,000 and $17,900,000,
for the years ended December 31, 1995, 1996 and 1997, respectively. Such sales
were in South America, Europe, Africa and the Middle East.

10.  EVENTS SUBSEQUENT TO DATE OF REPORT OF INDEPENDENT PUBLIC ACCOUNTANTS
     (UNAUDITED):

     In April 1998, the Company and its stockholder entered into a definitive
agreement with OEI, providing for the acquisition of the Company by OEI. The
definitive agreement provides that the advances to stockholder (Note 6) and
accrued legal judgement (Note 8) will be paid from the proceeds of the sale of
the stockholder's shares under the agreement.
   
     In June 1998, the Company settled the lawsuit referred in Note 8 for
$500,000. Under the definitive agreement, the excess of the amount previously
accrued for this matter at December 31, 1997 over the settlement amount
($3,020,815) will be distributed to the Company's stockholders on closing of the
Offering. Concurrently with the acquisition, the Company will enter into
agreements with the stockholder to lease facilities used in the Company's
operations for a negotiated amount and term.
    
     For the three months ended March 31, 1998, notes payable increased
approximately $1 million to provide working capital due to the increase in trade
receivables and cost and estimated profits in excess of billings on uncompleted
contracts.

                                      F-71
<PAGE>
                    REPORT OF INDEPENDENT PUBLIC ACCOUNTANTS

To W-Industries, Inc.:

     We have audited the accompanying balance sheets of W-Industries, Inc. (a
Texas corporation), as of December 31, 1996 and 1997, and the related statements
of income, stockholders' equity and cash flows for each of the three years in
the period ended December 31, 1997. These financial statements are the
responsibility of the Company's management. Our responsibility is to express an
opinion on these financial statements based on our audits.

     We conducted our audits in accordance with generally accepted auditing
standards. Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements are free of material
misstatement. An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements. An audit also includes
assessing the accounting principles used and significant estimates made by
management, as well as evaluating the overall financial statement presentation.
We believe that our audits provide a reasonable basis for our opinion.

     In our opinion, the financial statements referred to above present fairly,
in all material respects, the financial position of W-Industries, Inc., as of
December 31, 1996 and 1997, and the results of its operations and its cash flows
for each of the three years in the period ended December 31, 1997, in conformity
with generally accepted accounting principles.

ARTHUR ANDERSEN LLP

Houston, Texas
February 20, 1998

                                      F-72
<PAGE>
                               W-INDUSTRIES, INC.
                                 BALANCE SHEETS

                                              DECEMBER 31,
                                       --------------------------   MARCH 31,
                                           1996          1997          1998
                                       ------------  ------------  ------------
                                                                   (UNAUDITED)
               ASSETS
CURRENT ASSETS:
     Cash and cash equivalents.......  $    295,323  $  1,978,972  $     86,357
     Trade receivables...............     1,213,683     3,393,416     3,346,535
     Note receivable.................        32,052       --            --
     Costs and estimated profits in
       excess of billings on
       uncompleted contracts.........     1,191,764     1,477,201     4,092,337
     Inventory.......................        80,253        95,237       185,511
     Prepaid expenses and other......         3,789         9,145       113,846
                                       ------------  ------------  ------------
               Total current
                  assets.............     2,816,864     6,953,971     7,824,586
PROPERTY AND EQUIPMENT, net..........     1,045,395     1,051,582     1,099,175
                                       ------------  ------------  ------------
               Total assets..........  $  3,862,259  $  8,005,553  $  8,923,761
                                       ============  ============  ============
LIABILITIES AND STOCKHOLDERS' EQUITY
CURRENT LIABILITIES:
     Accounts payable................  $    437,930  $    885,502  $  1,907,831
     Accrued compensation and
       benefits......................       157,283       360,848       213,428
     Accrued liabilities.............        55,032        26,850        43,513
     Line of credit..................       200,000       --            100,000
     Current maturities of long-term
       debt..........................        62,565        68,467        70,217
     Payable to stockholder..........     1,690,187     5,438,546     3,588,833
     Billings in excess of costs and
       estimated profits on
       uncompleted contracts.........       --            --            206,022
                                       ------------  ------------  ------------
               Total current
                  liabilities........     2,602,997     6,780,213     6,129,844
LONG-TERM LIABILITIES:
     Long-term debt, net of current
       maturities....................       641,593       573,127       554,903
                                       ------------  ------------  ------------
               Total liabilities.....     3,244,590     7,353,340     6,684,747
                                       ------------  ------------  ------------
COMMITMENTS AND CONTINGENCIES
STOCKHOLDERS' EQUITY:
     Common stock, $1 par value,
       100,000 shares authorized;
       12,000 shares outstanding.....        12,000        12,000        12,000
     Additional paid-in capital......         8,000         8,000         8,000
     Retained earnings...............       597,669       632,213     2,219,014
                                       ------------  ------------  ------------
               Total stockholders'
                  equity.............       617,669       652,213     2,239,014
                                       ------------  ------------  ------------
               Total liabilities and
                  stockholders'
                  equity.............  $  3,862,259  $  8,005,553  $  8,923,761
                                       ============  ============  ============

   The accompanying notes are an integral part of these financial statements.

                                      F-73
<PAGE>
                               W-INDUSTRIES, INC.
                              STATEMENTS OF INCOME
<TABLE>
<CAPTION>
                                                                                              THREE MONTHS
                                                                                                 ENDED
                                                  YEAR ENDED DECEMBER 31,                      MARCH 31,
                                       ----------------------------------------------  --------------------------
                                            1995            1996            1997           1997          1998
                                       --------------  --------------  --------------  ------------  ------------
                                                                                              (UNAUDITED)
<S>                                    <C>             <C>             <C>             <C>           <C>         
REVENUES.............................  $   13,743,205  $   14,615,652  $   20,603,651  $  3,610,380  $  6,694,992
DIRECT COSTS.........................       8,563,129      10,382,226      13,699,944     2,451,166     4,330,106
                                       --------------  --------------  --------------  ------------  ------------
     Gross profit....................       5,180,076       4,233,426       6,903,707     1,159,214     2,364,886
GENERAL AND ADMINISTRATIVE
  EXPENSES...........................       1,981,656       2,513,157       3,003,226       645,752       691,104
                                       --------------  --------------  --------------  ------------  ------------
     Income from operations..........       3,198,420       1,720,269       3,900,481       513,462     1,673,782
                                       --------------  --------------  --------------  ------------  ------------
OTHER INCOME (EXPENSE):
     Interest expense, net...........        (204,546)       (189,381)       (246,757)      (60,041)     (106,775)
     Other...........................          89,658          31,106         154,185        38,041        19,794
                                       --------------  --------------  --------------  ------------  ------------
          Total......................        (114,888)       (158,275)        (92,572)      (22,000)      (86,981)
                                       --------------  --------------  --------------  ------------  ------------
NET INCOME...........................  $    3,083,532  $    1,561,994  $    3,807,909  $    491,462  $  1,586,801
                                       ==============  ==============  ==============  ============  ============
</TABLE>
   The accompanying notes are an integral part of these financial statements.

                                      F-74
<PAGE>
                               W-INDUSTRIES, INC.
                       STATEMENTS OF STOCKHOLDERS' EQUITY
<TABLE>
<CAPTION>
                                           COMMON STOCK       ADDITIONAL                       TOTAL
                                       --------------------    PAID-IN       RETAINED      STOCKHOLDERS'
                                        SHARES     AMOUNT      CAPITAL       EARNINGS         EQUITY
                                       ---------  ---------   ----------    -----------    -------------
<S>                                       <C>     <C>           <C>         <C>             <C>         
BALANCE, December 31, 1994...........     12,000  $  12,000     $8,000      $   181,106     $    201,106
     Net income......................     --         --          --           3,083,532        3,083,532
     Dividends declared..............     --         --          --          (1,279,458)      (1,279,458)
                                       ---------  ---------   ----------    -----------    -------------
BALANCE, December 31, 1995...........     12,000     12,000      8,000        1,985,180        2,005,180
     Net income......................     --         --          --           1,561,994        1,561,994
     Dividends declared..............     --         --          --          (2,949,505)      (2,949,505)
                                       ---------  ---------   ----------    -----------    -------------
BALANCE, December 31, 1996...........     12,000     12,000      8,000          597,669          617,669
     Net income......................     --         --          --           3,807,909        3,807,909
     Dividends declared..............     --         --          --          (3,773,365)      (3,773,365)
                                       ---------  ---------   ----------    -----------    -------------
BALANCE, December 31, 1997...........     12,000  $  12,000      8,000          632,213          652,213
     Net income (unaudited)..........     --         --          --           1,586,801        1,586,801
                                       ---------  ---------   ----------    -----------    -------------
BALANCE, March 31, 1998
  (unaudited)........................     12,000  $  12,000     $8,000      $ 2,219,014     $  2,239,014
                                       =========  =========   ==========    ===========    =============
</TABLE>
   The accompanying notes are an integral part of these financial statements.

                                      F-75
<PAGE>
                               W-INDUSTRIES, INC.
                            STATEMENTS OF CASH FLOWS
<TABLE>
<CAPTION>
                                                                                        THREE MONTHS
                                                                                           ENDED
                                               YEAR ENDED DECEMBER 31,                   MARCH 31,
                                       ----------------------------------------  --------------------------
                                           1995          1996          1997          1997          1998
                                       ------------  ------------  ------------  ------------  ------------
                                                                                        (UNAUDITED)
<S>                                    <C>           <C>           <C>           <C>           <C>         
CASH FLOWS FROM OPERATING ACTIVITIES:
    Net income.......................  $  3,083,532  $  1,561,994  $  3,807,909  $    491,462  $  1,586,801
    Adjustments to reconcile net
      income to net cash provided by
      operating activities --
         Depreciation................        99,237        35,193        60,440         7,284        13,635
         Gain on sale of equipment...       --            --             (2,020)      --            --
    Changes in assets and
      liabilities --
      (Increase) decrease in
      assets --
         Trade receivables...........      (304,929)      110,126    (2,179,733)   (1,082,920)       46,881
         Note receivable.............      (120,901)       88,849        32,052        23,919       --
         Costs and estimated profits
           in excess of billings on
           uncompleted contracts.....    (2,646,054)    1,797,672      (285,437)      297,327    (2,615,136)
         Inventory...................        24,676       (43,104)      (14,984)      (11,376)      (90,274)
         Prepaid expenses and
           other.....................         4,334        (3,123)       (5,356)     (115,638)     (104,701)
      Increase (decrease) in
         liabilities --
         Accounts payable............       437,863       (80,827)      447,572       700,244     1,022,329
         Accrued compensation and
           benefits..................        (3,506)       74,608       203,565        50,891      (147,420)
         Accrued liabilities.........        26,507         2,162       (28,182)       (7,045)       16,663
         Billings in excess of costs
           and estimated profits on
           uncompleted contracts.....       --            --            --            --            206,022
                                       ------------  ------------  ------------  ------------  ------------
             Net cash provided by
               (used in) operating
               activities............       600,759     3,543,550     2,035,826       354,148       (65,200)
                                       ------------  ------------  ------------  ------------  ------------
CASH FLOWS FROM INVESTING ACTIVITIES:
    Purchase of property and
      equipment......................    (1,099,207)      (24,592)      (67,607)      --            (61,228)
    Proceeds from the sale of
      equipment......................       --            --              3,000       --            --
                                       ------------  ------------  ------------  ------------  ------------
             Net cash used in
               investing
               activities............    (1,099,207)      (24,592)      (64,607)      --            (61,228)
                                       ------------  ------------  ------------  ------------  ------------
CASH FLOWS FROM FINANCING ACTIVITIES:
    Proceeds from (payments on) line
      of credit                             300,000      (100,000)     (200,000)      --            100,000
    Proceeds from issuance of note
      payable........................       800,000       --            --            --            --
    Principal payments on note
      payable........................       (33,642)      (62,199)      (62,564)      (15,924)      (16,474)
    Payments on stockholder
      payable........................      (815,229)   (3,306,220)      (25,006)     (520,676)   (1,849,713)
                                       ------------  ------------  ------------  ------------  ------------
             Net cash provided by
               (used in) financing
               activities............       251,129    (3,468,419)     (287,570)     (536,600)   (1,766,187)
                                       ------------  ------------  ------------  ------------  ------------
NET INCREASE (DECREASE) IN CASH AND
  CASH EQUIVALENTS...................      (247,319)       50,539     1,683,649      (182,452)   (1,892,615)
CASH AND CASH EQUIVALENTS, beginning
  of year............................       492,103       244,784       295,323       295,323     1,978,972
                                       ------------  ------------  ------------  ------------  ------------
CASH AND CASH EQUIVALENTS, end of
  year...............................  $    244,784  $    295,323  $  1,978,972  $    112,871  $     86,357
                                       ============  ============  ============  ============  ============
SUPPLEMENTAL CASH FLOW INFORMATION:
    Cash paid during the year for --
         Interest....................  $    217,966  $    217,799  $    251,388  $     61,716  $    106,775
                                       ============  ============  ============  ============  ============
</TABLE>
   The accompanying notes are an integral part of these financial statements.

                                      F-76
<PAGE>
                               W-INDUSTRIES, INC.
                         NOTES TO FINANCIAL STATEMENTS

1.  SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES:

  BUSINESS ACTIVITY

     W-Industries, Inc. (the Company), a Texas corporation, is an engineering,
systems and construction management contractor, servicing industrial customers
with primary focus in the process industries -- oil, chemical and petrochemical.
W-Industries, Inc., primarily operates in Houston, Texas.

     The Company and its stockholders intend to enter into a definitive
agreement with OEI International, Inc. (OEI), pursuant to which all outstanding
shares of the Company's common stock will be exchanged for cash and shares of
OEI common stock concurrent with the consummation of the initial public offering
(the Offering) of the common stock of OEI.

  INTERIM FINANCIAL INFORMATION

     The interim financial statements as of March 31, 1998, and for the three
months ended March 31, 1997 and 1998, are unaudited, and certain information and
footnote disclosures, normally included in financial statements prepared in
accordance with generally accepted accounting principles, have been omitted. In
the opinion of management, all adjustments, consisting only of normal recurring
adjustments, necessary to fairly present the financial position, results of
operations and cash flows with respect to the interim financial statements, have
been included. The results of operations for the interim periods are not
necessarily indicative of the results for the entire fiscal year.

  REVENUE RECOGNITION

     The Company generally provides its services under cost-plus contracts.
Revenues are recognized to the extent of billable rates times hours delivered
plus materials expense incurred. The Company reflects the costs of materials and
equipment as revenues which are reimbursable to the Company when it is
responsible for the engineering specification, procurement and management of
such cost components on behalf of the customer. The asset "Costs and estimated
profits in excess of billings on uncompleted contracts" represents revenues
recognized in excess of amounts billed.

  CASH AND CASH EQUIVALENTS

     Cash and cash equivalents include certificates of deposit with maturities
of three months or less.

  INVENTORY

     Inventories consist of stainless steel tube fittings, valves and
accessories held for use in the course of business and are stated at the lower
of cost or market.

  PROPERTY AND EQUIPMENT

     Property and equipment are stated at cost, and depreciation is computed
using an accelerated method of depreciation.

     Expenditures for repairs and maintenance are charged to expense when
incurred. Expenditures for major renewals and betterments, which extend the
useful lives of existing equipment, are capitalized and depreciated. Upon
retirement or disposition of property and equipment, the cost and related
accumulated depreciation are removed from the accounts and any resulting gain or
loss is recognized in the statements of income.

     The Company has adopted Statement of Financial Accounting Standards (SFAS)
No. 121, "Accounting for the Impairment of Long-Lived Assets and for Long-Lived
Assets to Be Disposed Of." Accordingly, in the event that facts and
circumstances indicate that property and equipment may be impaired, an
evaluation of recoverability would be performed. If an evaluation is required,
the estimated future undiscounted cash flows associated with the asset is
compared to the asset's carrying amount to determine if

                                      F-77
<PAGE>
                               W-INDUSTRIES, INC.
                  NOTES TO FINANCIAL STATEMENTS -- (CONTINUED)

a write-down to market value is necessary. Adoption of this standard did not
have a material effect on the financial position or results of operations of the
Company.

  INCOME TAX

     The Company has elected S Corporation status as defined by the Internal
Revenue Code, whereby the Company is not subject to taxation for federal
purposes. Under S Corporation status, the stockholders report their shares of
the Company's taxable earnings or losses in their personal tax returns. The
Company will terminate its S Corporation status concurrently with the effective
date of the Offering.

  FAIR VALUES OF FINANCIAL INSTRUMENTS

     The Company enters into various types of financial instruments in the
normal course of business. The Company does not hold or issue financial
instruments for trading purposes, nor does it hold interest rate, leveraged or
other types of derivative financial instruments. The carrying amounts of the
Company's financial instruments approximate their fair values.

  USE OF ESTIMATES

     The preparation of the Company's financial statements in conformity with
generally accepted accounting principles, particularly in the use of contract
accounting, requires management to make estimates and assumptions that affect
the reported amounts of assets and liabilities and disclosures of contingent
assets and liabilities at the date of the financial statements and the reported
amounts of revenues and expenses during the reporting period. Actual results
could differ from those estimates.

2.  PROPERTY AND EQUIPMENT:

     Property and equipment consist of the following:
<TABLE>
<CAPTION>
                                                                  DECEMBER 31,
                                        ESTIMATED USEFUL   --------------------------
                                         LIVES IN YEARS        1996          1997
                                        ----------------   ------------  ------------
<S>                                     <C>                <C>           <C>         
Land.................................       --             $    370,464  $    370,464
Building.............................            39             707,459       707,459
Transportation equipment.............             5             133,145       167,429
Machinery and equipment..............             3              16,994        16,994
Computer and telephone equipment.....           3-5              10,547        17,565
Furniture and fixtures...............             3              25,710        35,010
                                                           ------------  ------------
                                                              1,264,319     1,314,921
Less -- Accumulated depreciation.....                           218,924       263,339
                                                           ------------  ------------
     Property and equipment, net.....                      $  1,045,395  $  1,051,582
                                                           ============  ============
</TABLE>
3.  CONTRACTS IN PROGRESS:

     The status of contracts in progress is as follows:

                                              DECEMBER 31,
                                       --------------------------
                                           1996          1997
                                       ------------  ------------
Costs incurred on contracts in
progress.............................  $  2,004,847  $  2,100,648
Estimated earnings, net of losses....     1,038,527     1,034,648
                                       ------------  ------------
                                          3,043,374     3,135,296
Less -- Billings to date.............     1,851,610     1,658,095
                                       ------------  ------------
Costs and estimated profits in excess
  of billings on uncompleted
  contracts..........................  $  1,191,764  $  1,477,201
                                       ============  ============

                                      F-78
<PAGE>
                               W-INDUSTRIES, INC.
                  NOTES TO FINANCIAL STATEMENTS -- (CONTINUED)

4.  DEBT:

  LINE OF CREDIT

     The Company has a line of credit of $750,000, of which $550,000 and
$750,000 was unused at December 31, 1996 and 1997, respectively. The line of
credit is secured by an interest in all the Company's accounts receivable,
inventory and equipment and expires on April 14, 1998. Advances on the line of
credit accrue interest at a rate equal to prime (8.5% at December 31, 1997).
Interest is payable monthly.

     On April 14, 1998, the Company renewed the line of credit and increased the
line to $1,500,000. All terms remain the same and the line expires on April 14,
1999.

     Long-term debt consisted of the following:

                                              DECEMBER 31,
                                       --------------------------
                                           1996          1997
                                       ------------  ------------
Note payable to a bank, interest at
  the bank's base rate plus 0.5%
  (interest is 10% at December 31,
  1997), maturing February 24,
  2000...............................  $    704,159  $    641,594
Less -- Current maturities...........       (62,565)      (68,467)
                                       ------------  ------------
                                       $    641,594  $    573,127
                                       ============  ============

     The long-term debt is collateralized by buildings and real estate property.

     Maturities of long-term debt are as follows:

Year ending December 31 --
     1998............................  $   68,467
     1999............................      75,740
     2000............................     497,387
                                       ----------
                                       $  641,594
                                       ==========

     The Company paid interest of $80,043, $80,610 and $82,369 related to debt
for the years ended December 31, 1995, 1996 and 1997, respectively.

5. RELATED-PARTY TRANSACTIONS:

     The Company has followed a policy of paying substantially all of its
earnings to its stockholders. As of December 31, 1995, 1996 and 1997,
$2,046,901, $1,690,187 and $5,438,546, respectively, have not been paid to the
stockholders. Approximately $1,700,000 of this payable at December 31, 1997,
represents taxes on the earnings which is paid by the Company on behalf of its
stockholders. This amount plus $140,000 to the stockholders were paid subsequent
to year-end. Interest is earned annually at a rate of 10% on the unpaid
principal from the date of funding. For the years ended December 31, 1995, 1996
and 1997, the Company paid interest of $137,923, $137,189 and $169,019,
respectively, related to these dividends payable.

6. SIGNIFICANT CUSTOMERS AND VENDORS:

     Significant customers and vendors are those that account for greater than
10% of the Company's revenues and expenses, respectively. For the years ended
December 31, 1995, 1996 and 1997, one customer accounted for 17%, 20% and 12%,
respectively, of the Company's revenues. Receivables outstanding from this
customer represented 47%, 23% and 9% of the Company's trade receivables at
December 31, 1995, 1996 and 1997, respectively.

                                      F-79
<PAGE>
                               W-INDUSTRIES, INC.
                  NOTES TO FINANCIAL STATEMENTS -- (CONTINUED)

     During the year ended December 31, 1995, one vendor accounted for 11% of
the Company's purchases. Also, during the years ended December 31, 1995, 1996
and 1997, one vendor accounted for 17%, 15% and 19%, respectively, of the
Company's purchases.

7. COMMITMENTS AND CONTINGENCIES:

  LITIGATION

     The Company is involved in legal actions arising in the ordinary course of
business. Management does not believe the outcome of such legal actions will
have a material adverse effect on the Company's financial position or results of
operations.

  INSURANCE

     The Company carries a broad range of insurance coverage, including general
and business, auto liability, commercial property, workers' compensation and a
general umbrella policy. The Company has not incurred significant claims or
losses on any of its insurance policies.

8.  EXPORT SALES:

     Export sales were approximately $2,700,000, $2,900,000 and $5,200,000 for
the years ended December 31, 1995, 1996 and 1997, respectively. Such sales were
in South America, Africa and the Middle East and the Far East.

9.  EVENTS SUBSEQUENT TO DATE OF REPORT OF INDEPENDENT PUBLIC ACCOUNTANTS
    (UNAUDITED):

     In April the Company and its stockholders entered into a definitive
agreement with OEI providing for the acquisition of the Company by OEI.

     Prior to the acquisition, the Company will make a cash distribution of
$3,588,833 prior to the acquisition which represents the Company's payable to
shareholder (See Note 5). Had these transactions been recorded at March 31,
1998, the effect on the accompanying balance sheet would be a decrease in assets
of $3,588,833, and a decrease in liabilities of $3,588,833. This amount will be
funded through the proceeds of the Offering.

                                      F-80
<PAGE>
                    REPORT OF INDEPENDENT PUBLIC ACCOUNTANTS

To Chemical & Industrial Engineering, Inc.:

     We have audited the accompanying balance sheets of Chemical & Industrial
Engineering, Inc. (a Kentucky corporation), as of December 31, 1996 and 1997,
and the related statements of income, stockholders' equity and cash flows for
each of the three years in the period ended December 31, 1997. These financial
statements are the responsibility of the Company's management. Our
responsibility is to express an opinion on these financial statements based on
our audits.

     We conducted our audits in accordance with generally accepted auditing
standards. Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements are free of material
misstatement. An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements. An audit also includes
assessing the accounting principles used and significant estimates made by
management, as well as evaluating the overall financial statement presentation.
We believe that our audits provide a reasonable basis for our opinion.

     In our opinion, the financial statements referred to above present fairly,
in all material respects, the financial position of Chemical & Industrial
Engineering, Inc., as of December 31, 1996 and 1997, and the results of its
operations and its cash flows for each of the three years in the period ended
December 31, 1997, in conformity with generally accepted accounting principles.

ARTHUR ANDERSEN LLP

Houston, Texas
February 19, 1998

                                      F-81
<PAGE>
                    CHEMICAL & INDUSTRIAL ENGINEERING, INC.
                                 BALANCE SHEETS

                                              DECEMBER 31,
                                       --------------------------    MARCH 31,
                                           1996          1997          1998
                                       ------------  ------------   -----------
                                                                    (UNAUDITED)

               ASSETS
CURRENT ASSETS:
     Cash and cash equivalents.......  $     16,297  $  1,730,847   $   224,121
     Trade receivables...............     3,268,064     1,493,635     1,760,951
     Costs and estimated profits in
       excess of billings on
       uncompleted contracts.........        75,186       --            190,887
     Prepaid expenses and other......       171,368       115,632       118,282
     Deferred tax asset..............       169,718       175,710       176,033
                                       ------------  ------------   -----------
          Total current assets.......     3,700,633     3,515,824     2,470,274
PROPERTY AND EQUIPMENT, net..........     1,297,269     1,220,778     1,170,786
DEFERRED TAX ASSET...................       --            --             28,830
                                       ------------  ------------   -----------
          Total assets...............  $  4,997,902  $  4,736,602   $ 3,669,890
                                       ============  ============   ===========
LIABILITIES AND STOCKHOLDERS' EQUITY
CURRENT LIABILITIES:
     Accounts payable................  $  1,124,419  $    140,969   $   311,834
     Accrued compensation and
       benefits......................       798,129     1,168,250       648,233
     Accrued liabilities.............       325,338        75,497        46,962
     Notes payable...................       172,414       119,941       114,772
     Billings in excess of costs and
       estimated profits on
       uncompleted contracts.........       331,780       364,615       266,031
     Income taxes payable............        70,520       253,301        68,885
                                       ------------  ------------   -----------
          Total current
             liabilities.............     2,822,600     2,122,573     1,456,717
LONG-TERM LIABILITIES:
     Deferred tax liability..........       119,788       146,462       --
                                       ------------  ------------   -----------
          Total liabilities..........     2,942,388     2,269,035     1,456,717
                                       ------------  ------------   -----------
COMMITMENTS AND CONTINGENCIES
STOCKHOLDERS' EQUITY:
     Common stock-
       No par, nonvoting, 100,000
          shares authorized; 13,913,
          13,373, 13,384 shares
          outstanding,
          respectively...............       202,828       176,283       176,840
       No par, voting, 200,000 shares
          authorized; 27,658, 26,268,
          26,540 shares outstanding,
          respectively...............       419,418       386,384       399,547
     Retained earnings...............     1,433,268     1,904,900     1,636,786
                                       ------------  ------------   -----------
          Total stockholders'
             equity..................     2,055,514     2,467,567     2,213,173
                                       ------------  ------------   -----------
          Total liabilities and
             stockholders' equity....  $  4,997,902  $  4,736,602   $ 3,669,890
                                       ============  ============   ===========

   The accompanying notes are an integral part of these financial statements.

                                      F-82
<PAGE>
                    CHEMICAL & INDUSTRIAL ENGINEERING, INC.
                              STATEMENTS OF INCOME
<TABLE>
<CAPTION>
                                                                                      THREE MONTHS ENDED
                                               YEAR ENDED DECEMBER 31,                    MARCH 31,
                                       ----------------------------------------   --------------------------
                                           1995          1996          1997         1997           1998
                                       ------------  ------------  ------------   ---------    -------------
                                                                                         (UNAUDITED)
<S>                                    <C>           <C>           <C>            <C>            <C>       
REVENUES.............................  $ 12,522,354  $ 17,176,773  $ 15,906,131   $4,607,795     $2,151,342
DIRECT COSTS.........................     9,165,439    13,300,422    10,968,890   3,268,888      1,492,612
                                       ------------  ------------  ------------   ---------    -------------
         Gross profit................     3,356,915     3,876,351     4,937,241   1,338,907        658,730
GENERAL AND ADMINISTRATIVE
  EXPENSES...........................     3,151,834     3,546,955     3,996,613     773,332      1,087,835
                                       ------------  ------------  ------------   ---------    -------------
         Income from operations......       205,081       329,396       940,628     565,575       (429,105)
OTHER INCOME (EXPENSE):
    Interest income (expense), net...        33,714       (25,826)       36,464      (2,618)         4,353
    Other............................        (2,761)        3,993        (5,249)       (657)        (6,270)
                                       ------------  ------------  ------------   ---------    -------------
         Total.......................        30,953       (21,833)       31,215      (3,275)        (1,917)
                                       ------------  ------------  ------------   ---------    -------------
         Income before income
           taxes.....................       236,034       307,563       971,843     562,300       (431,022)
PROVISION (BENEFIT) FOR INCOME
  TAXES..............................       121,254       139,640       423,877     244,600       (165,031)
                                       ------------  ------------  ------------   ---------    -------------
NET INCOME (LOSS)....................  $    114,780  $    167,923  $    547,966   $ 317,700      $(265,991)
                                       ============  ============  ============   =========    =============
</TABLE>
   The accompanying notes are an integral part of these financial statements.

                                      F-83
<PAGE>
                    CHEMICAL & INDUSTRIAL ENGINEERING, INC.
                       STATEMENTS OF STOCKHOLDERS' EQUITY
<TABLE>
<CAPTION>
                                                        COMMON STOCK
                                          -----------------------------------------                    TOTAL
                                          NONVOTING   VOTING   NONVOTING    VOTING     RETAINED    STOCKHOLDERS'
                                           SHARES     SHARES    AMOUNT      AMOUNT     EARNINGS       EQUITY
                                          ---------   ------   ---------   --------   ----------   -------------
<S>                                         <C>       <C>      <C>         <C>        <C>           <C>         
BALANCE, December 31, 1994..............    23,181    28,210   $ 298,518   $280,233   $1,781,892    $  2,360,643
     Issuance of common stock...........     1,338       745      67,234     28,306       --              95,540
     Retirement of common stock.........    (5,397)   (2,745)    (69,465)   (11,024)    (292,409)       (372,898)
     Transfers of common stock..........      (500)      500     (21,500)    21,500       --            --
     Distribution to stockholders.......     --         --        --          --        (113,883)       (113,883)
     Net income.........................     --         --        --          --         114,780         114,780
                                          ---------   ------   ---------   --------   ----------   -------------
BALANCE, December 31, 1995..............    18,622    26,710     274,787    319,015    1,490,380       2,084,182
     Issuance of common stock...........       226     1,566      11,543     71,960       --              83,503
     Retirement of common stock.........    (3,664)   (1,889)    (41,578)   (13,481)    (225,035)       (280,094)
     Transfers of common stock..........    (1,271)    1,271     (41,924)    41,924       --            --
     Net income.........................     --         --        --          --         167,923         167,923
                                          ---------   ------   ---------   --------   ----------   -------------
BALANCE, December 31, 1996..............    13,913    27,658     202,828    419,418    1,433,268       2,055,514
     Issuance of common stock...........       216       717      10,585     32,378       --              42,963
     Retirement of common stock.........      (693)   (2,170)    (33,849)   (68,693)     (76,334)       (178,876)
     Transfers of common stock..........       (63)       63      (3,281)     3,281       --            --
     Net income.........................     --         --        --          --         547,966         547,966
                                          ---------   ------   ---------   --------   ----------   -------------
BALANCE, December 31, 1997..............    13,373    26,268     176,283    386,384    1,904,900       2,467,567
     Issuance of Common Stock
       (unaudited)......................        65       357       3,458     16,788       --              20,246
     Retirement of Common Stock
       (unaudited)......................     --         (139)     --         (6,526)      (2,123)         (8,649)
     Transfer of Common Stock
       (unaudited)......................       (54)       54      (2,901)     2,901       --            --
     Net income (unaudited).............     --         --        --          --        (265,991)       (265,991)
                                          ---------   ------   ---------   --------   ----------   -------------
BALANCE, March 31, 1998 (unaudited).....    13,384    26,540   $ 176,840   $399,547   $1,636,786    $  2,213,173
                                          =========   ======   =========   ========   ==========   =============
</TABLE>
   The accompanying notes are an integral part of these financial statements.

                                      F-84
<PAGE>
                    CHEMICAL & INDUSTRIAL ENGINEERING, INC.
                            STATEMENTS OF CASH FLOWS
<TABLE>
<CAPTION>
                                               YEAR ENDED DECEMBER 31,         THREE MONTHS ENDED MARCH 31,
                                       --------------------------------------- ---------------------------
                                           1995          1996         1997          1997          1998
                                       ------------  ------------  -----------  ------------  ------------
                                                                                       (UNAUDITED)
<S>                                    <C>           <C>           <C>          <C>           <C>          
CASH FLOWS FROM OPERATING ACTIVITIES:
    Net income.......................  $    114,780  $    167,923  $   547,966  $    317,700  $   (265,991)
    Adjustments to reconcile net
      income to net cash provided by
      (used in) operating
      activities --
         Depreciation................       272,691       306,049      354,424        74,272        86,895
         Loss (gain) on sale/disposal
           of assets.................         5,916          (308)       9,132                        (607)
         Deferred income taxes.......        (8,640)       11,853       20,682       246,745      (175,615)
         Changes in assets and
           liabilities --
           (Increase) decrease in --
             Trade receivables.......    (1,359,907)   (1,004,122)   1,774,429       692,485      (267,316)
             Costs and estimated
               profits in excess of
               billings on
               uncompleted
               contracts.............      (147,080)       71,894       75,186        75,186      (190,887)
             Prepaid expenses and
               other.................         2,649       (71,055)      55,736        79,628        (2,650)
           Increase (decrease) in --
             Accounts payable........       637,146       306,976     (983,450)   (1,022,229)      170,865
             Accrued compensation and
               benefits..............       568,267      (271,887)     370,121       (83,300)     (520,017)
             Accrued liabilities.....       237,564        87,449     (249,841)     (297,960)      (28,535)
             Billings in excess of
               costs and estimated
               profits on uncompleted
               contracts.............       517,812      (186,032)      32,835       (62,189)      (98,584)
             Income taxes payable....      (212,821)      240,392      182,781       (77,360)     (184,416)
                                       ------------  ------------  -----------  ------------  ------------
         Net cash provided by (used
           in) operating
           activities................       628,377      (340,868)   2,190,001       (57,022)   (1,476,858)
                                       ------------  ------------  -----------  ------------  ------------
CASH FLOWS FROM INVESTING ACTIVITIES:
    Purchase of property and
      equipment......................      (521,294)     (566,190)    (287,065)     (116,504)      (39,983)
    Proceeds from sale of
      equipment......................         2,222         1,939      --            --              3,687
                                       ------------  ------------  -----------  ------------  ------------
         Net cash used in investing
           activities................      (519,072)     (564,251)    (287,065)     (116,504)      (36,296)
                                       ------------  ------------  -----------  ------------  ------------
CASH FLOWS FROM FINANCING ACTIVITIES:
    Proceeds from (principal payments
      on) notes payable..............       243,426       (85,077)     (52,473)      173,783        (5,169)
    Proceeds from issuance of common
      stock..........................        95,540        83,503       42,963         9,654        20,246
    Payments for retirement of common
      stock..........................      (372,898)     (280,094)    (178,876)      --             (8,649)
    Distributions to stockholders....       (56,655)      (57,228)     --            --            --
                                       ------------  ------------  -----------  ------------  ------------
         Net cash used in financing
           activities................       (90,587)     (338,896)    (188,386)      183,437         6,428
                                       ------------  ------------  -----------  ------------  ------------
NET INCREASE (DECREASE) IN CASH AND
  CASH EQUIVALENTS...................        18,718    (1,244,015)   1,714,550         9,911    (1,506,726)
CASH AND CASH EQUIVALENTS, beginning
  of year............................     1,241,594     1,260,312       16,297        16,297     1,730,847
                                       ------------  ------------  -----------  ------------  ------------
CASH AND CASH EQUIVALENTS, end of
  year...............................  $  1,260,312  $     16,297  $ 1,730,847  $     26,208  $    224,121
                                       ============  ============  ===========  ============  ============
SUPPLEMENTAL CASH FLOW INFORMATION:
    Cash paid during the year for --
         Interest....................  $      8,029  $     37,752  $    27,109         3,595       --
         Income taxes................       343,839       --           218,747       321,960       --
</TABLE>
   The accompanying notes are an integral part of these financial statements.

                                      F-85
<PAGE>
                     CHEMICAL & INDUSTRIAL ENGINEERING, INC
                         NOTES TO FINANCIAL STATEMENTS

1.  SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES:

  BUSINESS ACTIVITY

     Chemical & Industrial Engineering, Inc. (the Company), a Kentucky
corporation, is an engineering and systems procurement management contractor,
servicing industrial customers with primary focus in the process industries
- -oil, chemical, petrochemical and food products. Chemical & Industrial
Engineering, Inc., primarily operates in Kentucky.

     The Company and its stockholders intend to enter into a definitive
agreement with OEI International, Inc. (OEI), pursuant to which all outstanding
shares of the Company's common stock will be exchanged for cash and shares of
OEI common stock concurrent with the consummation of the initial public offering
(the Offering) of the common stock of OEI.

  INTERIM FINANCIAL INFORMATION

     The interim financial statements as of March 31, 1998, and for the three
months ended March 31, 1997 and 1998, are unaudited, and certain information and
footnote disclosures, normally included in financial statements prepared in
accordance with generally accepted accounting principles, have been omitted. In
the opinion of management, all adjustments, consisting only of normal recurring
adjustments, necessary to fairly present the financial position, results of
operations and cash flows with respect to the interim financial statements, have
been included. The results of operations for the interim periods are not
necessarily indicative of the results for the entire fiscal year.

  REVENUE RECOGNITION

     The Company provides a majority of its services through cost-plus
contracts. Revenues are recognized to the extent of billable rates times hours
delivered plus materials expense incurred. The Company does not reflect the
costs of materials and equipment as revenues which are reimbursable to the
Company when it is responsible for the engineering specification, procurement
and management of such cost components on behalf of the customer. For the three
years ended December 31, 1995, 1996 and 1997, these amounts were $4,395,384,
$4,803,742 and $8,329,277, respectively. Fixed-price contracts represent
approximately 30% of the Company's revenues in 1996 and approximately 18% of
revenues in 1997. Revenue on fixed-price contracts are recognized on the
percentage-of-completion method measured by the percentage of costs incurred to
total estimated costs for each contract. Revisions in revenue and cost
projections are recorded in the period in which the facts requiring the revision
become known. When estimates of projected revenues and costs indicate a loss,
the total estimated loss is accrued. Potential additional revenues on projects
from claims and unapproved change orders are not recognized until amounts may be
reliably estimated and realization is virtually certain. The asset "Costs and
estimated profits in excess of billings on uncompleted contracts" represents
revenues recognized in excess of amounts billed. The liability "Billings in
excess of costs and estimated profits on uncompleted contracts" represents
amounts billed in excess of revenues recognized.

  CASH AND CASH EQUIVALENTS

     Cash and cash equivalents include short-term cash investments with
maturities of three months or less.

  PROPERTY AND EQUIPMENT

     Property and equipment are stated at cost, and depreciation is computed
using the straight-line method over the estimated useful lives of the assets.
Leasehold improvements are capitalized and amortized over the lesser of the life
of the lease or the estimated useful life of the asset.

     Expenditures for repairs and maintenance are charged to expense when
incurred. Expenditures for major renewals and betterments, which extend the
useful lives of existing equipment, are capitalized and

                                      F-86
<PAGE>
                    CHEMICAL & INDUSTRIAL ENGINEERING, INC.
                  NOTES TO FINANCIAL STATEMENTS -- (CONTINUED)

depreciated. Upon retirement or disposition of property and equipment, the cost
and related accumulated depreciation are removed from the accounts and any
resulting gain or loss is recognized in the statements of income.

     The Company has adopted Statement of Financial Accounting Standards (SFAS)
No. 121, "Accounting for the Impairment of Long-Lived Assets and for Long-Lived
Assets to Be Disposed Of." Accordingly, in the event that facts and
circumstances indicate that property and equipment may be impaired, an
evaluation of recoverability would be performed. If an evaluation is required,
the estimated future undiscounted cash flows associated with the asset is
compared to the asset's carrying amount to determine if a write-down to market
value is necessary. Adoption of this standard did not have a material effect on
the financial position or results of operations of the Company.

  INCOME TAX

     The Company follows the liability method of accounting for income taxes in
accordance with SFAS No. 109. Under this method, deferred income taxes are
recorded based upon the differences between the financial reporting and tax
bases of assets and liabilities and are measured using the enacted tax rates and
laws that will be in effect when the underlying assets or liabilities are
recovered or settled.

  FAIR VALUES OF FINANCIAL INSTRUMENTS

     The Company enters into various types of financial instruments in the
normal course of business. The Company does not hold or issue financial
instruments for trading purposes, nor does it hold interest rate, leveraged or
other types of derivative financial instruments. The carrying amounts of the
Company's financial instruments approximate their fair values.

  USE OF ESTIMATES

     The preparation of the Company's financial statements in conformity with
generally accepted accounting principles, particularly in the use of the
percentage-of-completion method of accounting, requires management to make
estimates and assumptions that affect the reported amounts of assets and
liabilities and disclosures of contingent assets and liabilities at the date of
the financial statements and the reported amounts of revenues and expenses
during the reporting period. Actual results could differ from those estimates.

2.  PROPERTY AND EQUIPMENT:

     Property and equipment consist of the following:
<TABLE>
<CAPTION>
                                                                   DECEMBER 31,
                                        ESTIMATED USEFUL    --------------------------
                                         LIVES IN YEARS         1996          1997
                                        -----------------   ------------  ------------
<S>                                         <C>             <C>           <C>         
Computer and telephone equipment.....       5               $  1,893,389  $  2,190,379
Leasehold improvements...............       3                     21,437        21,437
Furniture and fixtures...............       10                   920,760       863,292
                                                            ------------  ------------
                                                               2,835,586     3,075,108
Less- Accumulated depreciation.......                          1,538,317     1,854,330
                                                            ------------  ------------
     Property and equipment, net.....                       $  1,297,269  $  1,220,778
                                                            ============  ============
</TABLE>
                                      F-87
<PAGE>
                    CHEMICAL & INDUSTRIAL ENGINEERING, INC.
                  NOTES TO FINANCIAL STATEMENTS -- (CONTINUED)

3.  CONTRACTS IN PROGRESS:

     The status of contracts in progress is as follows:

                                                 DECEMBER 31,
                                          --------------------------
                                              1996          1997
                                          ------------  ------------
Costs incurred on contracts in
  progress..............................  $    488,556  $  3,145,107
Estimated earnings, net of losses.......       125,835       472,753
                                          ------------  ------------
                                               614,391     3,617,860
Less -- Billings to date................       870,985     3,982,475
                                          ------------  ------------
                                          $   (256,594) $   (364,615)
                                          ============  ============
Costs and estimated profits in excess of
  billings on uncompleted contracts.....  $     75,186  $    --
Billings in excess of costs and
  estimated profits on uncompleted
  contracts.............................      (331,780)     (364,615)
                                          ------------  ------------
                                          $   (256,594) $   (364,615)
                                          ============  ============

4.  DEBT:

  LINE OF CREDIT

     The Company has a line of credit of $1,500,000, which was unused at
December 31, 1996 and 1997. The line of credit is secured by an interest in all
the Company's accounts receivable, contract rights and equipment and expires on
June 15, 1998. Advances on the line of credit accrue interest at a rate equal to
prime (8.5% at December 31, 1997). Interest is payable quarterly. Management
believes the line of credit can be renewed upon expiration.

     The line of credit contains covenants requiring the maintenance of a
borrowing base equal to the aggregate of 50% of the Company's net carrying value
of equipment plus 80% of the Company's then-current accounts receivable less
than 90 days old, and various other covenants as specified in the loan
agreement, as amended. The Company is in compliance with these covenants at
December 31, 1996 and 1997.

  NOTES PAYABLE FOR STOCK REDEMPTIONS

     Notes payable consist of amounts due to 12 terminated employees for stock
redemptions at book value at the date of termination. All notes payable have
maturities of one year from redemption (currently all are due in 1998) and bear
interest ranging from 8.25% to 8.5%. The Company paid interest of $49,757 and
$15,124 related to this debt for the years ended December 31, 1996 and 1997,
respectively.

5.  LEASES:

     The Company leases office space under an operating lease agreement which
expires in June 1999. Rent expense was $257,887, $302,176 and $366,308 for the
years ended December 31, 1995, 1996 and 1997, respectively.

     The Company leases vehicles for certain key members of management which
expire 1998-2000. The lease payments under these vehicle leases were
approximately $5,437, $19,471 and $16,124 for the years ended December 31, 1995,
1996 and 1997, respectively.

                                      F-88
<PAGE>
                    CHEMICAL & INDUSTRIAL ENGINEERING, INC.
                  NOTES TO FINANCIAL STATEMENTS -- (CONTINUED)

     Future lease payments for existing operating leases are as follows:

Year ending December 31 --
1998.................................  $  355,581
1999.................................     165,137
2000.................................       4,343
                                       ----------
                                       $  525,061
                                       ==========

6.  INCOME TAXES:

     Provisions for federal, state and local income taxes are as follows:

                                            YEAR ENDED DECEMBER 31,
                                       ----------------------------------
                                          1995        1996        1997
                                       ----------  ----------  ----------
Federal --
     Current.........................  $   96,889  $  100,681  $  306,662
     Deferred........................      --           9,877      17,235
State and local --
     Current.........................      24,365      27,106      96,533
     Deferred........................      --           1,976       3,447
                                       ----------  ----------  ----------
                                       $  121,254  $  139,640  $  423,877
                                       ==========  ==========  ==========

     Actual income tax expense differs from income tax expense computed by
applying the U.S. federal statutory personal service corporate rate of 35% to
income before income taxes as follows:

                                                  DECEMBER 31,
                                       ----------------------------------
                                          1995        1996        1997
                                       ----------  ----------  ----------
Provision at the statutory rate......  $   82,612  $  107,647  $  340,145
Increase resulting from --
     Nondeductible expenses..........      15,099      11,853      17,400
     State income tax, net of federal
       benefit.......................      23,543      20,140      66,332
                                       ----------  ----------  ----------
                                       $  121,254  $  139,640  $  423,877
                                       ==========  ==========  ==========

     Deferred income tax provisions result from temporary differences in the
recognition of income and expenses for financial reporting purposes and for tax
purposes. The cumulative effects of these temporary differences represent
deferred tax assets and liabilities and relate principally to the following:

                                              DECEMBER 31,
                                       --------------------------
                                           1996          1997
                                       ------------  ------------
Accrued expenses.....................  $    169,718  $    175,710
Property and Equipment...............      (119,788)     (146,462)
                                       ------------  ------------
     Net deferred income tax asset...  $     49,930  $     29,248
                                       ============  ============

                                      F-89
<PAGE>
                    CHEMICAL & INDUSTRIAL ENGINEERING, INC.
                  NOTES TO FINANCIAL STATEMENTS -- (CONTINUED)

     The net deferred tax assets and liabilities are classified in the
accompanying balance sheet as follows:

                                            DECEMBER 31,
                                       ----------------------
                                          1996        1997
                                       ----------  ----------
Deferred tax assets-
     Current.........................  $  169,718  $  175,710
     Long-term.......................      --          --
Deferred tax liabilities-
     Current.........................      --          --
     Long-term.......................     119,788     146,462
                                       ----------  ----------
          Net deferred income tax
             asset...................  $   49,930  $   29,248
                                       ==========  ==========

7.  STOCKHOLDERS' EQUITY:

     An employee is eligible to invest upon board-of-director approval in the
voting shares of the Company upon becoming a full-time, benefited employee with
a total continuous service of one year. Nonvoting stock is restricted to
full-time employees. Redemption of shares is mandatory upon employee
termination, change in employment status or death of employee. Issuance and
redemption price of stock is based on (a) the price last fixed by the board of
directors as the stock price or (b) the book value (defined as total
stockholders' equity divided by the total shares outstanding) per share,
whichever is larger. Book value per share at December 31, 1997, is $62.25. Stock
is canceled upon redemption.

8.  EMPLOYEE BENEFIT PLANS:

     Employees of the Company may participate in a 401(k) plan, whereby the
employees may elect to make contributions pursuant to a salary reduction
agreement upon meeting age and length-of-service requirements. The plan provides
for the Company to match 50% of the first 6% contributed by each employee. Total
contributions by the Company under this plan were $132,895, $160,427 and
$165,345 during 1995, 1996 and 1997, respectively.

9.  RELATED-PARTY TRANSACTIONS:

     At December 31, 1997, the Company had advanced $27,083 to OEI in expenses
related to compliance with the letter-of-intent agreement with OEI dated
November 1997. These expenses are on behalf of the stockholders and are included
in the prepaid expenses. The current intent is for the monies advanced by the
Company to be reimbursed by the stockholders upon the consummation of the
Offering.

10.  SIGNIFICANT CUSTOMERS AND VENDORS:

     Significant customers and vendors are those that account for greater than
10% of the Company's revenues and expenses, respectively. During the year ended
December 31, 1995, two customers accounted for 50% and 13% of the Company's
total revenues. Receivables outstanding from these customers represented 16% and
6% of the Company's trade receivables at December 31, 1995. For the year ended
December 31, 1996, two customers accounted for 47% and 20% of total revenues.
Receivables outstanding for these customers represented 34% and 15% of the
Company's trade receivables at December 31, 1996. For the year ended December
31, 1997, three customers accounted for 39%, 28% and 14% of total revenues.
Receivables outstanding from these customers represented 12%, 21% and 0% of the
Company's trade receivables at December 31, 1997.

     For the years ended December 31, 1995, 1996 and 1997, no vendors accounted
for greater than 10% of the Company's purchases.

                                      F-90
<PAGE>
                    CHEMICAL & INDUSTRIAL ENGINEERING, INC.
                  NOTES TO FINANCIAL STATEMENTS -- (CONTINUED)

11.  COMMITMENTS AND CONTINGENCIES:

  LITIGATION

     The Company is involved in legal actions arising in the ordinary course of
business. Management does not believe the outcome of such legal actions will
have a material adverse effect on the Company's financial position or results of
operations.

  INSURANCE

     The Company carries a broad range of insurance coverage, including
professional and director and officer liability, general and business, auto
liability, commercial property, foreign coverage liability, workers'
compensation and a general umbrella policy. The Company has not incurred
significant claims or losses on any of its insurance policies.

12.  EXPORT SALES

     Export sales were approximately $2,200,000 for the year ended December 31,
1997. Such sales were in Africa and the Middle East.

13.  EVENT SUBSEQUENT TO DATE OF REPORT OF INDEPENDENT PUBLIC ACCOUNTANTS
     (UNAUDITED):

     In April 1998, the Company and its stockholders entered into a definitive
agreement with OEI, providing for the acquisition of the Company by OEI.

                                      F-91
<PAGE>
  NO DEALER, SALESPERSON OR ANY OTHER PERSON HAS BEEN AUTHORIZED TO GIVE ANY
INFORMATION OR TO MAKE ANY REPRESENTATIONS OTHER THAN THOSE CONTAINED IN THIS
PROSPECTUS IN CONNECTION WITH THE OFFER CONTAINED HEREIN, AND, IF GIVEN OR MADE,
SUCH INFORMATION OR REPRESENTATIONS MUST NOT BE RELIED UPON AS HAVING BEEN
AUTHORIZED BY THE COMPANY OR BY ANY OF THE UNDERWRITERS. THIS PROSPECTUS DOES
NOT CONSTITUTE AN OFFER OF ANY SECURITIES OTHER THAN THOSE TO WHICH IT RELATES
OR AN OFFER TO SELL, OR A SOLICITATION OF AN OFFER TO BUY, THOSE TO WHICH IT
RELATES IN ANY STATE TO ANY PERSON TO WHOM IT IS NOT LAWFUL TO MAKE SUCH OFFER
IN SUCH STATE. THE DELIVERY OF THIS PROSPECTUS AT ANY TIME DOES NOT IMPLY THAT
THE INFORMATION HEREIN IS CORRECT AS OF ANY TIME SUBSEQUENT TO ITS DATE.

                               ------------------

                               TABLE OF CONTENTS

                                          PAGE
                                          ----
Prospectus Summary......................    3
Risk Factors............................    8
The Company.............................   16
Use of Proceeds.........................   19      
Dividend Policy.........................   19
Capitalization..........................   20              4,300,000 Shares     
Dilution................................   21                                   
Selected Historical and Pro Forma                      OEI INTERNATIONAL, INC.  
  Combined Financial Data...............   22                                   
Management's Discussion and Analysis of                      Common Stock       
  Financial Condition and Results of                                            
  Operation.............................   24                ------------       
Industry Overview.......................   29                 PROSPECTUS        
Business................................   31                            , 1998 
Management..............................   44                ------------       
Certain Transactions....................   51                                   
Principal Stockholders..................   53            SALOMON SMITH BARNEY   
Shares Eligible for Future Sale.........   54              CIBC OPPENHEIMER     
Description of Capital Stock............   55            SANDERS MORRIS MUNDY   
Underwriting............................   58        
Legal Matters...........................   59
Experts.................................   60
Additional Information..................   60
Index to Financial Statements...........  F-1

  UNTIL                      , 1998 (25 DAYS AFTER THE COMMENCEMENT OF THE
OFFERING), ALL DEALERS EFFECTING TRANSACTIONS IN THE COMMON STOCK, WHETHER OR
NOT PARTICIPATING IN THIS DISTRIBUTION, MAY BE REQUIRED TO DELIVER A PROSPECTUS.
THIS IS IN ADDITION TO THE OBLIGATION OF DEALERS TO DELIVER A PROSPECTUS, WHEN
ACTING AS UNDERWRITERS AND WITH RESPECT TO THEIR UNSOLD ALLOTMENTS ON
SUBSCRIPTIONS.
<PAGE>
                                    PART II
                     INFORMATION NOT REQUIRED IN PROSPECTUS

ITEM 3.  OTHER EXPENSES OF ISSUANCE AND DISTRIBUTION.

     The following table sets forth the expenses (other than underwriting
discounts and commissions) in connection with the offering described in this
Registration Statement, all of which shall be paid by OEI. All of such amounts
(except the SEC Registration Fee, the NASD Filing Fee and the New York Stock
Exchange Listing Fee) are estimated.

SEC Registration Fee.................  $     21,882
NASD Filing Fee......................         7,918
New York Stock Exchange Listing
  Fee................................       120,085
Blue Sky Fees and Expenses...........        10,000
Printing and Engraving Costs.........       400,000
Legal Fees and Expenses..............       800,000
Accounting Fees and Expenses.........     1,600,000
Transfer Agent and Registrar Fees and
  Expenses...........................         5,000
Miscellaneous........................        35,115
                                       ------------
     Total...........................  $  3,000,000
                                       ============

ITEM 14.  INDEMNIFICATION OF DIRECTORS AND OFFICERS.

     Section 145 of the Delaware General Corporation Law permits a corporation
to indemnify any person who was or is a party or is threatened to be made a
party to any threatened, pending or completed action, suit or proceeding,
whether civil, criminal, administrative or investigative, by reason of the fact
that he is or was a director, officer, employee or agent of the corporation or
is or was serving at the request of the corporation as a director, officer,
employee or agent of another corporation, partnership, joint venture, trust or
other enterprise against expenses, judgments, fines and amounts paid in
settlement actually and reasonably incurred by him in connection with such
action. In an action brought to obtain a judgment in the corporation's favor,
whether by the corporation itself or derivatively by a stockholder, the
corporation may only indemnify for expenses, including attorney's fees, actually
and reasonably incurred in connection with the defense or settlement of such
action, and the corporation may not indemnify for amounts paid in satisfaction
of a judgment or in settlement of the claim. In any such action, no
indemnification may be paid in respect of any claim, issue or matter as to which
such person shall have been adjudged liable to the corporation except as
otherwise approved by the Delaware Court of Chancery or the court in which the
claim was brought. In any other type of proceeding, the indemnification may
extend to judgments, fines and amounts paid in settlement, actually and
reasonably incurred in connection with such other proceeding, as well as to
expenses.

     The statute does not permit indemnification unless the person seeking
indemnification has acted in good faith and in a manner he reasonably believed
to be in, or not opposed to, the best interests of the corporation and, in the
case of criminal actions or proceedings, the person had no reasonable cause to
believe his conduct was unlawful. The statute contains additional limitations
applicable to criminal actions and to actions brought by or in the name of the
corporation. The determination as to whether a person seeking indemnification
has met the required standard of conduct is to be made (1) by a majority vote of
the directors who are not parties to such action, suit or proceeding, even
though less than a quorum, or (2) if there are no such directors, or if such
directors so direct, by independent legal counsel in a written opinion, or (3)
by the stockholders.

     OEI's Certificate of Incorporation and Bylaws require OEI to indemnify its
directors and officers to the fullest extent permitted under Delaware law. OEI's
Certificate of Incorporation limits the personal liability of a director to the
corporation or its stockholders to damages for breach of the director's
fiduciary duty.

                                      II-1
<PAGE>
     OEI has not purchased insurance on behalf of its directors and officers
against certain liabilities that may be asserted against, or incurred by, such
persons in their capacities as directors or officers of the registrant, or that
may arise out of their status as directors or officers of the registrant,
including liabilities under the federal and state securities laws. OEI has
entered into indemnification agreements to indemnify its directors and executive
officers to the maximum extent permitted under Delaware law.

     The Underwriting Agreement provides for indemnification of the directors
and officers of the Company in certain circumstances.

ITEM 15.  RECENT SALES OF UNREGISTERED SECURITIES.

     The following table reflects sales by OEI of unregistered securities within
the past three years. Share amounts have been adjusted for the 1,828.368-for-one
stock split effected on April 6, 1998. Except as otherwise disclosed, the
issuances by OEI of the securities sold in the transactions referenced below
were not registered under the Securities Act, pursuant to the exemption
contemplated in Section 4(2) thereof, for transactions not involving a public
offering. No underwriter was involved in the transactions and no commissions
were paid. The consideration for which the shares of Common Stock were sold, all
of which was payable in cash, is indicated below:
<TABLE>
<CAPTION>
                                                      NUMBER OF        CASH
             DATE                     PURCHASER        SHARES      CONSIDERATION
- ---------------------------------------------------   ---------    -------------
<S>                          <C>                      <C>            <C>      
October 9, 1997............. M. L. Burrow Family
                              Partnership, Ltd.         207,194      $  113.33
October 9, 1997............. Gary J. Coury              207,194      $  113.33
October 9, 1997............. Dana W. Swindler           158,443      $   86.67
October 9, 1997............. Equus II Incorporated    1,218,973      $  666.67
March 31, 1998.............. Rick Berry                  36,564      $   20.00
</TABLE>
ITEM 16.  EXHIBITS AND FINANCIAL STATEMENT SCHEDULES.

     (a)  Exhibits.
   
<TABLE>
<CAPTION>
      EXHIBIT
         NUMBER                                                  DESCRIPTION
- ------------------------  ------------------------------------------------------------------------------------------
<C>                       <S>
          *1.1       --   Form of Underwriting Agreement dated               , 1998, by and among OEI and Smith
                          Barney Inc.
          *2.1       --   Uniform Provisions for the Acquisition of the Founding Companies.
          *2.2       --   Agreement and Plan of Reorganization dated April 10, 1998, by and among OEI, PEI
                          Acquisition, Inc., Petrocon and certain of its principal stockholders.
          *2.3       --   Agreement and Plan of Reorganization dated as of April 10, 1998, by and among OEI, PS&S
                          Acquisition, Inc., PS&S and its stockholders.
          *2.4       --   Agreement and Plan of Reorganization dated as of April 10, 1998, by and among OEI, GEI
                          Acquisition, Inc., GEI and its stockholders.
          *2.5       --   Agreement and Plan of Reorganization dated as of April 10, 1998, by and among OEI, W-I
                          Acquisition Inc., W-I and its stockholders.
          *2.6       --   Agreement and Plan of Reorganization dated as of April 10, 1998, by and among OEI, C&I
                          Acquisition, Inc., C&I and certain of its principal stockholders.
          *3.1       --   Amended and Restated Certificate of Incorporation of OEI.
          *3.2       --   Bylaws of OEI.
         **4.1       --   Form of Certificate representing Common Stock.
          *4.2       --   Form of Registration Rights Agreement among OEI and the stockholders listed on the
                          signature pages thereto.
          *5.1       --   Opinion of Porter & Hedges, L.L.P.
         *10.1       --   1998 Incentive Plan of OEI.
         *10.2       --   1998 Employee Stock Purchase Plan of OEI.
</TABLE>
                                      II-2
    
<PAGE>
   
<TABLE>
<CAPTION>
        EXHIBIT
         NUMBER                                                  DESCRIPTION
- ------------------------  ------------------------------------------------------------------------------------------
<C>                       <S>
         *10.3       --   Form of Indemnification Agreement between OEI and each of its directors and executive
                          officers.
         *10.4       --   Employment Agreement by and between OEI and Michael L. Burrow dated April 10, 1998.
         *10.5       --   Employment Agreement by and between OEI and Gary J. Coury dated April 10, 1998.
         *10.6       --   Employment Agreement by and between OEI and Rick Berry dated April 10, 1998.
         *10.7       --   Employment Agreement by and between OEI and Dana W. Swindler dated April 10, 1998.
         *10.8       --   Employment Agreement by and between OEI and Robert W. Raiford dated April 10, 1998.
         *10.9       --   Employment Agreement by and between GEI and Jerry G. Gulsby dated April 10, 1998.
         *10.10      --   Lease dated as of May 1, 1983, as amended, between PS&S and Mountain Boulevard Associates
                          I and Lease Modification Agreement dated                , 1998.
         *10.11      --   Lease Agreement dated January 12, 1981, as amended, between PS&S and Mountain Boulevard
                          Associates II and Lease Modification Agreement dated                , 1998.
         *10.12      --   Lease Agreement dated December 29, 1986, as amended, between PS&S and Mountain Boulevard
                          Associates III and Lease Modification Agreement dated                , 1998.
         *21.1       --   Subsidiaries of OEI.
        **23.1       --   Consent of Arthur Andersen LLP.
        **23.2       --   Consent of Arthur Andersen & Co.
         *23.3       --   Consent of Porter & Hedges, L.L.P. (contained in Exhibit 5.1).
         *23.4       --   Consent of W. Bernard Pieper as a nominee for director.
         *23.5       --   Consent of Bob G. Gower as a nominee for director.
         *23.6       --   Consent of C. Roland Haden as nominee for director.
         *24.1       --   Power of Attorney (included on the signature page of this Registration Statement).
         *27.1       --   Financial Data Schedule.
</TABLE>
    
- ------------
 * Previously filed.
   
** Filed herewith.
    
     (b)  Financial Statement Schedules.

     All schedules are omitted because they are not applicable or because the
required information is contained in the Financial Statements or Notes thereto.

ITEM 17.  UNDERTAKINGS.

     The undersigned registrant hereby undertakes to provide to the
Underwriters, at the closing specified in the Underwriting Agreement,
certificates representing the shares of Common Stock offered hereby in such
denominations and registered in such names as required by the Underwriters to
permit prompt delivery to each purchaser.

     Insofar as indemnification for liabilities arising under the Securities Act
of 1933 may be permitted to directors, officers and controlling persons of the
registrant pursuant to the foregoing provisions, or otherwise, the registrant
has been advised that in the opinion of the Securities and Exchange Commission
such indemnification is against public policy as expressed in the Securities Act
and is, therefore, unenforceable. In the event that a claim for indemnification
against such liabilities (other than the payment by the registrant of expenses
incurred or paid by a director, officer or controlling person of the registrant
in

                                      II-3
<PAGE>
the successful defense of any action, suit or proceeding) is asserted by such
director, officer or controlling person in connection with securities being
registered, the registrant will, unless in the opinion of its counsel the matter
has been settled by controlling precedent, submit to a court of appropriate
jurisdiction the question whether such indemnification by it is against public
policy as expressed in the Act and will be governed by the final adjudication of
such issue.

     The undersigned registrant hereby undertakes that:

          (1)  For the purposes of determining any liability under the
     Securities Act of 1933, the information omitted from the form of prospectus
     filed as a part of this registration statement in reliance upon Rule 430A
     and contained in a form of prospectus filed by the registrant pursuant to
     Rule 424(b)(1) or (4) or 497(h) under the Securities Act shall be deemed to
     be part of this registration statement as of the time it was declared
     effective.

          (2)  For the purpose of determining any liability under the Securities
     Act of 1933, each post-effective amendment that contains a form of
     prospectus shall be deemed to be a new registration statement relating to
     the securities offered therein, and the offering of such securities at that
     time shall be deemed to be the initial bona fide offering thereof.

                                      II-4
<PAGE>
                                   SIGNATURES
   
     PURSUANT TO THE REQUIREMENTS OF THE SECURITIES ACT OF 1933, THE REGISTRANT
HAS DULY CAUSED THIS AMENDMENT NO. 4 TO THE REGISTRATION STATEMENT TO BE SIGNED
ON ITS BEHALF BY THE UNDERSIGNED, THEREUNTO DULY AUTHORIZED, IN THE CITY OF
HOUSTON, STATE OF TEXAS, ON JULY 7, 1998.
    
                                          OEI INTERNATIONAL, INC.
                                          By:  /s/ MICHAEL L. BURROW
                                                   MICHAEL L. BURROW,
                                                   CHIEF EXECUTIVE OFFICER
   
     PURSUANT TO THE REQUIREMENTS OF THE SECURITIES ACT OF 1933, THIS AMENDMENT
NO. 4 TO THE REGISTRATION STATEMENT HAS BEEN SIGNED BY THE FOLLOWING PERSONS IN
THE CAPACITIES INDICATED AND ON JULY 7, 1998.
    
     SIGNATURE                             CAPACITY IN WHICH SIGNED
- -----------------------  -------------------------------------------------------
/s/ MICHAEL L. BURROW    Chief Executive Officer, Director (Principal Executive
    MICHAEL L. BURROW     Officer)

/s/ RICK BERRY           Executive Vice President and Chief Financial Officer
    RICK BERRY            (Principal Financial and Accounting Officer)

         *               President, Chief Operating Officer 
    GARY J. COURY         Director

         *               Director
    NOLAN LEHMANN

         *               Director
    GARY L. FORBES

*By: /s/ RICK BERRY
         RICK BERRY
EXECUTIVE VICE PRESIDENT 
AND CHIEF FINANCIAL OFFICER
   AS ATTORNEY-IN-FACT

                                      II-5
<PAGE>
                                    APPENDIX
            OEI INTERNATIONAL, INC. GRAPHICS AND TEXT FOR PROSPECTUS

PAGE 2 (INSIDE FRONT COVER)

     OEI International logo with OEI International, Inc.

TEXT: (TOP LEFT SIDE OF PAGE)

     Engineered solutions for a global customer base.

TEXT: (TOP HALF OF PAGE)

     The following table appears:
<TABLE>
<CAPTION>
COMPANY                                           LOCATION                  BUSINESS
- -----------------------------------------   -------------------  ------------------------------
<S>                                         <C>                  <C>   
Petrocon Engineering, Inc.                  Beaumont, Texas      Multidisciplined engineering
                                                                 and design services
Paulus, Sokolowski and Sartor, Inc.         Warren, New Jersey   Engineering, geotechnical and
                                                                 environmental services
W-Industries, Inc.                          Houston, Texas       Designs, builds and installs
                                                                 control and instrumentation
                                                                 systems
Gulsby Engineering, Inc.                    Houston, Texas       Designs and builds modular
                                                                 processing plants
Chemical & Industrial Engineering, Inc.     Louisville, Kentucky Engineering, procurement and
                                                                 construction management
                                                                 services
</TABLE>
GRAPHICS (MIDDLE OF PAGE):

     One 3-D drawing and two photographs are contained in the middle of the
page. From left to right these include (i) a 3-D drawing of a gas treating
facility, (ii) a photograph of a control room with systems designed by the
Company and (iii) a photograph of a marine research laboratory designed by the
Company.

TEXT (BOTTOM OF PAGE):

     The Company intends to furnish its stockholders with annual reports
containing financial statements audited by independent certified public
accountants and with quarterly reports containing unaudited summary financial
information for each of the first three quarters of each fiscal year.

(INSIDE GATE-FOLD)

GRAPHICS (GENERAL):

     The gatefold contains a world map, which has been highlighted in those
states within the United States and countries worldwide where the Company was
involved in projects during 1997.

TEXT (BOTTOM RIGHT CORNER):

     During 1997, OEI was involved in projects in 26 states and 21 countries
worldwide.

GRAPHICS (INTERSPERSED):

     Collage of five photographs located in the top center of the page, top
right side of page, lower right portion of the page, bottom center of the page
and lower left hand corner of the page depicting a (i) gas treating facility,
(ii) fixed offshore platform, (iii) food processing unit, (iv) modular
processing plant and (v) control panel, respectively, all of which were designed
and/or built by the Company.

GRAPHICS (BOTTOM LEFT SIDE):

     OEI International logo with OEI International, Inc.

                                      A-1
<PAGE>
TEXT (INTERSPERSED):

     Related text included with each of the photographs described above is as
follows:

          o  Gas Treating Facility

          o  Fixed Offshore Platform

          o  Food Processing Unit

          o  Modular Processing Unit

          o  Control Panel

INSIDE BACK COVER:

     GRAPHICS (GENERAL):  Chart depicting the following industries served by the
Company: Industrial Processing, Transportion, General Building, Manufacturing,
Power, Hazardous Waste, Water Supply, Sewer/Waste and Petroleum/Chemical.

TEXT (LOWER RIGHT HAND CORNER):

     Engineered solutions for a global customer base.

                                      A-2

                                                                     EXHIBIT 4.1

NUMBER [Vignette]           OEI INTERNATIONAL, INC.                 COMMON STOCK
OEI                              (Logo Format)
                          INCORPORATED UNDER THE LAWS                     SHARES
                            OF THE STATE OF DELAWARE

                                                               CUSIP 670829 10 0
                                                                 SEE REVERSE FOR
                                                             CERTAIN DEFINITIONS

THIS IS CERTIFY THAT


IS THE OWNER OF

            SHARES FULLY PAID AND NON-ASSESSABLE, OF THE COMMON STOCK
OF THE PAR VALUE OF $.001 EACH, OF

OEI International, Inc. (hereinafter called the "Corporation"), transferable on
the books of the Corporation, in person or by duly authorized attorney, upon
surrender of this Certificate properly endorsed. This Certificate and the shares
represented hereby are issued and shall be held subject to all the provisions of
the Certificate of Incorporation and all amendments thereto, copies of which are
on file at the office of the Transfer Agent, and the holder hereof, by
acceptance of this Certificate, consents to and agrees to be bound by all of
said provisions. This Certificate is not valid until countersigned by the
Transfer Agent and registered by the Registrar.

      In Witness Whereof, OEI International, Inc. has caused its corporate seal
to be hereunto affixed, and this Certificate to be signed by its duly authorized
officers.

Dated

OEI INTERNATIONAL, INC.
DELAWARE CORPORATE SEAL

COUNTERSIGNED AND REGISTERED:
AMERICAN STOCK TRANSFER & TRUST COMPANY
            (New York, N.Y.)  TRANSFER AGENT
                              AND REGISTRAR
BY
     AUTHORIZED SIGNATURE

                  /s/ RICK BERRY                /s/ M.L. BURROW
                      Secretary                  Chairman and Chief
                                                  Executive Officer
<PAGE>
                             OEI INTERNATIONAL, INC.

THE CORPORATION WILL FURNISH WITHOUT CHARGE TO EACH STOCKHOLDER WHO SO REQUESTS
THE POWERS, DESIGNATIONS, PREFERENCES, AND RELATIVE PARTICIPATING, OPTIONAL OR
OTHER SPECIAL RIGHTS OF EACH CLASS OF STOCK OR SERIES THEREOF OF THE CORPORATION
AND THE QUALIFICATIONS, LIMITATIONS OR RESTRICTIONS OF SUCH PREFERENCES AND/OR
RIGHTS. SUCH REQUEST MAY BE MADE TO THE SECRETARY OF THE CORPORATION OR TO THE
TRANSFER AGENT.

      The following abbreviations, when used in the inscription on the face of
this certificate, shall be construed as though they were written out in full
according to applicable laws or regulations:

TEN COM -as tenants in common        UNIF GIFT MIN ACT -_______ Custodian ______
TEN ENT -as tenants by the entireties                  (Cust)            (Minor)
JT TEN  -as joint tenants with right of            under Uniform Gifts to Minors
         survivorship and not as tenants             Act _______________________
         in common                                              (State)

     Additional abbreviations may also be used though not in the above list.

      For value received, ______________________ hereby sell, assign and
transfer unto


PLEASE INSERT SOCIAL SECURITY OR OTHER
      IDENTIFYING NUMBER OF ASSIGNEE
___________________________________________
________________________________________________________________________________
            PLEASE PRINT OR TYPEWRITE NAME AND ADDRESS OF ASSIGNEE
________________________________________________________________________________
________________________________________________________________________________
_______________________________________________________________________  Shares
of the capital stock represented by the within Certificate, and do hereby
irrevocably constitute and appoint
_______________________________________________________________________ Attorney
to transfer the said stock on the books of the within-named Corporation with
full power of substitution in the premises.

Dated: ____________

                                 _______________________________________________
                        NOTICE:  THE SIGNATURE TO THIS ASSIGNMENT MUST
                                 CORRESPOND WITH THE NAME AS WRITTEN UPON THE
                                 FACE OF THE CERTIFICATE IN EVERY PARTICULAR
                                 WITHOUT ALTERNATION OR ENLARGEMENT OR ANY
                                 CHANGE WHATEVER.

Signature(s) Guaranteed

By: __________________________________________
THE SIGNATURE(S) SHOULD BE GUARANTEED BY AN ELIGIBLE 
GUARANTOR INSTITUTION (BANKS, STOCKBROKERS, SAVINGS 
AND LOAN ASSOCIATIONS AND CREDIT UNIONS WITH MEMBERSHIP 
IN AN APPROVED SIGNATURE GUARANTEE MEDALLION PROGRAM), 
PURSUANT TO S.E.C. RULE 17Ad-15.

                                        2

                                                                    EXHIBIT 23.1

                   CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS

     As independent public accountants, we hereby consent to the use of our
reports (and to all references to our Firm) included in or made a part of this
registration statement.

ARTHUR ANDERSEN LLP
   
Houston, Texas
July 7, 1998
    

                                                                    EXHIBIT 23.2

                   CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS

     As independent public accountants, we hereby consent to the use of our
reports (and to all references to our Firm) included in or made a part of this
registration statement.

ARTHUR ANDERSEN & CO.
   
Al Khobar, Saudi Arabia
July 7, 1998
    


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