QUESTECH INC
10-Q, 1998-05-08
ENGINEERING SERVICES
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<PAGE>

                                UNITED STATES
                     SECURITIES AND EXCHANGE COMMISSION
                          Washington, D. C.  20549
                               ---------------
                                  FORM 10-Q

[X] Quarterly Report, Pursuant to Section 13 or 15(d) of the Securities Exchange
Act of 1934

             For the Quarterly Period Ended March 31, 1998, or

[ ] Transition Report, Pursuant to Section 13 or 15(d) of the Securities
Exchange Act of 1934

                  For the Transition Period _____ to ______

                       Commission File Number 2-88617

                            QuesTech, Inc.
           (Exact name of Registrant as specified in its charter)

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

          Virginia                                   54-0844913
- --------------------------------        ------------------------------------
(State or other jurisdiction of         (IRS Employer Identification Number)
 incorporation or organization)

7600-A Leesburg Pike,
Falls Church, Virginia                                  22043
- --------------------------------            ------------------------------
(Address of principal executive offices)              (Zip code)

                                (703) 760-1000
                                --------------
            (Registrant's telephone number, including area code)

Indicate by check mark whether the registrant (1) has filed all reports required
to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during
the preceding 12 months (or for such shorter period that the registrant was
required to file such reports), and (2) has been subject to such filing
requirements for the past 90 days.

                              Yes  X      No 
                                 -----       -----

Indicate the number of shares outstanding of each of the issuer's classes of
common stock, as of the latest practicable date.

        Common Stock, $0.05 par value                    1,916,004
        -----------------------------                 ------------------
                    Class                             Outstanding as of
                                                      April 30, 1998


<PAGE>


                       QuesTech, Inc. and Subsidiaries

                                  Form 10-Q
                    For the Quarter Ended March 31, 1998

                                  I N D E X



<TABLE>
<CAPTION>


                                                            Page No.
                                                            --------
<S>                                                       <C>
PART I.   Financial Information

  Item 1  Financial Statements

     CONDENSED CONSOLIDATED BALANCE SHEET                       2

     CONSOLIDATED STATEMENTS OF EARNINGS                        4

     CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS            5

     CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY            6

     NOTES TO CONSOLIDATED FINANCIAL STATEMENTS                 7

  Item 2  Management's Discussion and Analysis of
          Financial Condition and Results of Operations         9

PART II.  Other Information

  Item 1  Legal Proceedings                                    12

  Item 6  Exhibits and Reports on Form 8K                      12

Officers' Signatures                                           13

Index to Exhibits                                              14

</TABLE>


                                       1
<PAGE>

                       QuesTech, Inc. and Subsidiaries

                    CONDENSED CONSOLIDATED BALANCE SHEET

                                  ASSETS
<TABLE>
<CAPTION>

                                                 Mar. 31       Dec. 31
                                                   1998          1997
                                                 --------      --------
                                               (Unaudited)     (Audited)
                                               -----------     ---------
<S>                                            <C>           <C>        
CURRENT ASSETS
  Cash and cash equivalents ................   $   111,600   $   108,500
  Accounts receivable ......................    14,266,300    13,002,000
  Inventories ..............................       116,500        69,200
  Prepaid expenses and other ...............       279,400       165,300
  Deferred income taxes ....................       239,500       239,500
                                               -----------   -----------

       Total current assets ................   $15,013,300   $13,584,500
                                               -----------   -----------

EQUIPMENT AND LEASEHOLD IMPROVEMENTS - at 
  cost less accumulated depreciation and
  amortization of $6,539,800 and $6,298,200,
  respectively .............................     5,353,400     5,434,400
GOODWILL less accumulated amortization of
  $1,764,800 and $1,726,200, respectively ..     1,171,700     1,210,400
DEFERRED INCOME TAXES, net of valuation
  allowance of $262,000 ....................     1,369,900     1,369,900
OTHER ASSETS ...............................     2,337,200     2,369,600
                                               -----------   -----------

  TOTAL ASSETS                                 $25,245,500   $23,968.800
                                               -----------   -----------
                                               -----------   -----------

</TABLE>


The accompanying notes are an integral part of these statements.


                                       2
<PAGE>


                       QuesTech, Inc. and Subsidiaries

                    CONDENSED CONSOLIDATED BALANCE SHEET

                    LIABILITIES AND STOCKHOLDERS' EQUITY
<TABLE>
<CAPTION>

                                                 Mar. 31       Dec. 31
                                                   1998          1997
                                                ---------      --------
                                               (Unaudited)     (Audited)
                                               -----------     ---------
<S>                                            <C>           <C>        
CURRENT LIABILITIES
  Line of Credit ...........................   $ 4,937,900   $ 3,919,800
  Current maturities of long-term
    obligations payable ....................       514,000       511,900
  Accounts payable .........................     1,729,100     2,195,400
  Accrued liabilities ......................     5,649,100     5,095,800
  Income taxes
    Currently payable ......................       107,500           --
                                               -----------   -----------
       Total current liabilities ...........   $12,937,600   $11,722,900

LONG-TERM OBLIGATIONS ......................     1,401,200     1,527,800

INDEBTEDNESS TO RELATED PARTIES ............     1,574,100     1,542,900

ACCRUED POST-RETIREMENT BENEFIT COST .......     1,608,000     1,577,000

OTHER LONG-TERM OBLIGATIONS ................       870,600       894,300
                                               -----------   -----------
       Total Liabilities ...................   $18,391,500   $17,264,900
                                               -----------   -----------

STOCKHOLDERS' EQUITY
  Common stock - authorized 3,000,000
      shares of $.05 par value, issued 
      1,925,904 and 1,657,304 shares,
      outstanding 1,916,004 and 1,618,557 
      shares at March 31, 1998
      and December 31, 1997 ................        96,300        82,800
  Additional paid in capital ...............     5,012,900     2,878,300
  Retained earnings ........................     4,443,900     4,297,900
  Less Treasury Stock at cost ..............       (30,200)     (210,500)
  Due from SECT ............................    (2,668,900)     (344,600)
                                               -----------   -----------
       Total Stockholders' Equity ..........   $ 6,854,000   $ 6,703,900
                                               -----------   -----------

  TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY   $25,245,500   $23,968,800
                                               -----------   -----------
                                               -----------   -----------
</TABLE>

The accompanying notes are an integral part of these statements.



                                       3
<PAGE>

                       QuesTech, Inc. and Subsidiaries

               CONSOLIDATED STATEMENTS OF EARNINGS (UNAUDITED)


<TABLE>
<CAPTION>

                                                    Three Months Ended March 31,
                                                         1998          1997
                                                         ----          ----

<S>                                              <C>            <C>        
Revenues ......................................     $19,164,900    $19,812,700

Operating expenses
  Salaries, wages and employee benefits .......      11,009,500     10,186,800
  Other operating expenses ....................       7,675,900      9,275,400
                                                    -----------    -----------

        Total operating expenses ..............     $18,685,400    $19,462,200
                                                    -----------    -----------

        Income from operations ................         479,500        350,500

  Interest expense ............................        (226,000)      (139,500)
                                                    -----------    -----------

       Earnings before income taxes ...........     $   253,500    $   211,000

Provision for income taxes ....................        (107,500)       (89,400)
                                                    -----------    -----------
       Net earnings ...........................     $   146,000    $   121,600
                                                    -----------    -----------
                                                    -----------    -----------

Earnings per share:
       Basic ..................................     $       .10    $       .08
       Diluted ................................     $       .10    $       .08

Weighted Average Number of common shares 
 outstanding:
       Basic ..................................       1,443,062      1,436,862
       Diluted ................................       1,508,404      1,509,610
</TABLE>


The accompanying notes are an integral part of these statements.


                                       4
<PAGE>


                       QuesTech, Inc. and Subsidiaries

         CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED)
<TABLE>
<CAPTION>

                                                         Three Months
                                                        Ended March 31
                                                      ------------------
                                                      1998          1997
                                                      ----          ----
<S>                                               <C>            <C>        
Increase (Decrease) in Cash and Cash Equivalents

Cash flows from operating activities:
  Net earnings ................................   $   146,000    $   121,600
Adjustments to reconcile net earnings to
  Net cash provided by operating activities:
    Depreciation and amortization .............       304,800        272,700
    Increase in value of Deferred Compensation
      Plan assets .............................       (45,000)       (50,000)
    Changes in assets and liabilities .........    (1,089,300)     1,296,600
                                                  -----------    -----------
      Net cash (used in) provided by 
        operating activities ..................      (683,500)     1,640,900
                                                  -----------    -----------

Cash flows from investing activities:
  Capital expenditures ........................      (189,300)      (327,600)
                                                  -----------    -----------
      Net cash used in investing activities ...      (189,300)      (327,600)
                                                  -----------    -----------

Cash flows from financing activities:
  Increase(Decrease) in Line of Credit ........     1,018,100     (1,227,400)
  Cash proceeds from exercise of stock options          4,000         13,600
  Repayment of long-term debt .................      (124,500)       (97,400)
  Repayment of Other Long-Term Obligations ....       (21,700)       (20,000)
                                                  -----------    -----------
      Net cash provided by (used in) financing
        activities ............................       875,900     (1,331,200)
                                                  -----------    -----------

Net increase(decrease) in cash ................         3,100        (17,900)
Cash, beginning of period .....................       108,500         54,300
                                                  -----------    -----------
Cash, end of period ...........................   $   111,600    $    36,400
                                                  -----------    -----------
                                                  -----------    -----------

Cash payments for:
  Interest ....................................   $   224,100    $   133,600
  Income taxes ................................        15,800        268,300

Non-cash financing activities:
Issuance of 268,000 shares to the SECT ........     2,144,000            --
Sale of 28,847 shares of Treasury stock
  to the SECT .................................       180,300            --

</TABLE>


The accompanying notes are an integral part of these statements.


                                       5
<PAGE>


                       QuesTech, Inc. and Subsidiaries

         CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (UNAUDITED)

<TABLE>
<CAPTION>

                                                       Three Months
                                                      Ended March 31
                                                    -----------------
                                                    1998           1997
                                                    ----           ----
<S>                                           <C>            <C>        
Common Stock:
  Beginning balance .........................  $    82,800     $    82,500
  Exercise of options .......................          100             200
  Issuance of shares to the SECT ............       13,400             --
                                               -----------     -----------
  Ending balance ............................       96,300          82,700
                                               -----------     -----------

Additional paid in capital
  Beginning balance .........................    2,878,300       2,835,600
  Exercise of options .......................        3,900          13,300
  Issuance of shares to the SECT ............    2,130,700             --
                                               -----------     -----------
  Ending balance ............................    5,012,900       2,848,900
                                               -----------     -----------

Retained Earnings
  Beginning balance .........................    4,297,900       3,652,000
  Net Earnings ..............................      146,000         121,600
                                               -----------     -----------
  Ending balance ............................    4,443,900       3,773,600
                                               -----------     -----------

Treasury Shares:
  Beginning balance .........................     (210,500)       (193,100)
  Re-issuance of shares .....................      180,300             --
  Exercise of options .......................          --              --
                                               -----------     -----------
  Ending balance ............................      (30,200)       (193,100)
                                               -----------     -----------

Due from SECT
  Beginning balance .........................     (344,600)       (344,600)
  Issuance of shares to the SECT ............   (2,324,300)           --
                                               -----------     -----------
  Ending balance ............................   (2,668,900)       (344,600)
                                               -----------     -----------
Total Stockholders' Equity ..................  $ 6,854,000     $ 6,167,500
                                               -----------     -----------
                                               -----------     -----------

</TABLE>

The accompanying notes are an integral part of these statements.


                                       6
<PAGE>

                       QuesTech, Inc. and Subsidiaries

                 Notes to Consolidated Financial Statements
                           March 31, 1998 and 1997
                                 (Unaudited)




1.   General

     The accompanying unaudited condensed consolidated financial statements have
been prepared pursuant to the rules and regulations of the Securities and
Exchange Commission. Certain information and note disclosures normally included
in the annual financial statements prepared in accordance with generally
accepted accounting principles have been condensed or omitted pursuant to those
rules and regulations, although the company believes that the disclosures made
are adequate to make the information presented not misleading.

     In the opinion of management, the accompanying condensed financial
statements for the periods presented reflect all adjustments and
reclassifications that are necessary for fair presentation. It is suggested that
these condensed financial statements be read in conjunction with the
consolidated financial statements and the notes thereto included in the
company's latest annual report to the Securities and Exchange Commission on Form
10-K.

2.   Earnings Per Share

     In 1997 the Financial Accounting Standards Board issued Financial
Accounting Standard No. 128 (SFAS 128), "Earnings Per Share." This Statement
replaces the presentation of primary EPS with a presentation of basic EPS. It
also requires dual presentation of basic and diluted EPS on the face of the
income statement for all entities with complex capital structures and requires a
reconciliation of the numerator and denominator of the basic EPS computation to
the numerator and denominator in the diluted EPS computation. Basic EPS ignores
potential dilution and is computed by dividing income available to common
stockholders by the weighted-average number of common shares outstanding for the
period. Diluted EPS reflects potential dilution, dilution that would occur if
securities were converted into common stock or other contracts to issue common
stock were exercised, resulting in the issuance of addition common stock that
would share in the earnings of the entity. In complying with the requirements of
SFAS No. 128, the Company has restated all prior period EPS data.

     Although outstanding, the shares held by the Company-controlled Stock
Employee Compensation Trust ("SECT") are excluded from the weighted average
number of shares, for purposes of calculating earnings per share. As of March
31, 1998, a total of 366,600 shares are subject to outstanding stock option

                                       7

<PAGE>

agreements and if dilutive, are accounted for as common stock equivalents 
under the treasury stock method. The strike prices of these options range 
from $4.00 to $7.70 per share. The average bid price of the Company's stock 
for the quarter ended March 31, 1998 was $6.83 per share.

     The following table reconciles basic and diluted EPS:
<TABLE>
<CAPTION>

                                                      Three Months
                                                     Ended March 31
                                                   ------------------
                                                   1998         1997
                                                   ----         ----
<S>                                           <C>           <C>
Numerator
Net Income                                      $  146,000    $  121,600
                                                ----------    ----------
                                                ----------    ----------

Denominator
Denominator for basic EPS-weighted
 average shares                                  1,443,062     1,436,862

Effect of dilutive securities stock options         65,342        72,748
                                                ----------    ----------

Denominator for diluted EPS                      1,508,404     1,509,610
                                                ----------    ----------
                                                ----------    ----------
</TABLE>

Disclosures about Segments of an Enterprise and Related Information

     The Financial Accounting Standards Board recently issued Statement of
Financial Accounting Standards No. 131 (SFAS 131), "Disclosures about Segments
of an Enterprise and Related Information," effective for periods beginning after
December 15, 1997. This Statement establishes standards for the way that public
business enterprises report information about operating segments in annual
financial statements and requires that those enterprises report selected
information about operating segments in interim financial reports issued to
shareholders. It also establishes standards for related disclosures about
products and services, geographic areas, and major customers.

     The Statement need not be applied to interim financial statements in the
initial year of its application, but comparative information for interim periods
in the initial year of application shall be reported in financial statements for
interim periods in the second year of application. The Company has opted to
comply with the Statement's requirements effective with its filing of the 1998
10-K.


                                       8
<PAGE>

Item 2.  Management's Discussion and Analysis of Financial Condition
                       and Results of Operations


RESULTS OF OPERATIONS

     The following table sets forth major items included in the Unaudited
Consolidated Statement of Earnings as a percentage of revenue.
<TABLE>
<CAPTION>

                                                  Three Months Ended
                                                       March 31
                                                  ------------------
                                                   1998        1997
                                                   ----        ----
<S>                                             <C>         <C>    
Revenues                                          100.00%     100.00%
Operating Expenses                                 97.50%      98.23%
                                                  ------      ------ 
Income from operations                              2.50%       1.77%
Interest                                           (1.18%)      (.70%)
Provision for income taxes                          (.56%)      (.45%)
                                                  ------      ------
     Net Earnings                                    .76%        .62%
                                                  ------      ------ 
                                                  ------      ------ 
</TABLE>


     Revenues for the three months ended March 31, 1998 were $19.2 million, 
down 3% when compared with the same period in 1997. Revenues were impacted by 
a revenue decline in the government contracts segment, as a result of the 
transition of work associated with the Company's largest contract, TEFS, from 
the former Vint Hills Farm Station in Warrenton, Virginia to Fort Monmouth, 
New Jersey adjacent to the Army's Communications Electronics Command. TEFS' 
revenues accounted for only 30% of the Company's combined government contract 
revenues during the first quarter of 1998, as compared to 37% during the same 
period last year. In addition, revenues from another large Army contract, 
HTRD, declined as it nears completion this year. Revenue reductions from 
these two contracts were partially mitigated by growth in new business, 
particularly in video graphics production and technical and engineering 
acquisition support.

     In the commercial segment, revenues were $16,700 during the first quarter
of 1998. Production, which was expected to commence in March, 1998, has been
postponed until the second quarter of 1998 at the request of the customer. There
were no reportable revenues during the first quarter of 1997.

     Salaries, wages and employee benefits as a component of total operating 
expenses increased as a result of additional direct labor requirements for 
contracts awarded late 1997. Other operating expenses declined as a result of 
reduced contractual requirements for pass-through expenses, primarily for 
TEFS, and delays in bid and proposal (B & P) expenditures. Management expects 
B & P expenditures to increase during the course of the year. In addition, 
management undertook a major cost containment initiative in order to temper 
the rate of increase of certain indirect expenses, thereby benefiting 
profitability of certain T & M (time and materials) contracts. In the 
aggregate, total operating expenses for the first quarter of 1998 declined by 
approximately 4% when compared with the same period last year.

                                       9
<PAGE>




     Income from operations at March 31, 1998, was $479,500, up 37% compared to
the same period last year. Expense decline and improved margins on certain
contracts contributed to the growth in income from operations.

     During the first quarter of 1998, pretax income was $253,500, which
increased 20% over the same period in 1997 notwithstanding the increased
interest expense arising from higher levels of borrowing under the line of
credit. Earnings per share were $.10 on net earnings of $146,000, up 25% and 20%
respectively over the same period last year, when earnings per share were $.08
on net earnings of $121,600.

LIQUIDITY AND CAPITAL RESOURCES

     The following table sets forth certain financial data with respect to
changes in the Company's liquidity and capital resources since December 31, 1997
(in thousands of dollars except for ratios):
<TABLE>
<CAPTION>

                             3/31/98       12/31/97    NET CHANGES
                             -------       --------    -----------
<S>                        <C>            <C>          <C>   
Working capital              $ 2,075        $ 1,862      $  213
Current assets                15,013         13,585       1,428
Current liabilities           12,938         11,723       1,215
Working capital ratio (1)      1.16           1.16          --
</TABLE>

(1) Current assets over current liabilities.

     During the first quarter of 1998, the Company used borrowings under its 
line of credit facility to finance its operations and capital expenditures. 
Capital expenditures were incurred primarily to expand the Company's wide 
area network by two additional sites and to upgrade PC (personal computers) 
equipment. Cash flows from operations were impacted by a recent increase in 
receivables, pending receipt of additional funding.

     In addition, during the first quarter of 1998, the Company allocated
268,000 shares of newly issued common stock and re-issued 28,847 shares of
Treasury stock to the SECT. In consideration for the subject shares, the SECT
executed a promissory note to the Company in the amount of $2.3 million. The
note will be liquidated upon the SECT's release of shares of stock to fund the
exercise of stock options granted to certain Company employees under the
Company's various stock option plans.

     Subsequent to the date of the financial statements, the Company 
renegotiated an increase in its line of credit from $6 million to $8 million 
and an extension of the term to March 31, 1999. Other terms of the agreement 
did not materially change.


                                       10
<PAGE>

YEAR 2000 ISSUE

     Management has undertaken an investigation of whether the Company will 
be adversely impacted by the issue of whether its systems are year 2000 
compliant. Based on this review, management has determined that a material 
adverse impact on the Company's financial statements is unlikely.

INFLATION

     During the first quarter of 1998, the impact of inflation on the Company's
costs has been minimal. Inflationary costs are normally anticipated in the
pricing structure of contracts and recovered through the reimbursement of
contract costs incurred.

BACKLOG

     Set forth in the table below is the Company's funded and unfunded backlog
as of March 31, 1998 and March 31, 1997.
<TABLE>
<CAPTION>

                Funded Backlog                 Unfunded Backlog
                --------------                 ----------------
                   March 31                        March 31
                   --------                        --------
              1998          1997              1998           1997
              ----          ----              ----           ----

        <S>           <C>              <C>            <C>  
          $43,334,536   $37,117,900      $315,916,164   $360,272,800
</TABLE>

     "Backlog" is the aggregate contract revenues remaining to be earned under
written contracts as of the stated date. "Funded backlog" is that portion which
is covered by funding appropriations to and allotments by the procuring
agencies. "Unfunded backlog" is that portion of backlog equal to the backlog
less the funded backlog. Although there can be no assurance that unfunded
backlog will become funded backlog, historically a majority of the Company's
unfunded backlog has eventually been converted into funded backlog.


                                       11
<PAGE>

                                   PART II


Item 1.  Legal Proceedings

     The Company, including its subsidiaries, are not subject to any material
pending legal proceedings, and none of the assets of the Company or its
subsidiaries are subject to any such proceedings, other than routine litigation,
if any, incidental to the business and against which the Company is either
adequately insured, or which is not material.


Item 6.  Exhibits and Reports on Form 8-K.

     (a) Exhibits required in connection with this quarterly report on Form 10-Q
are listed in the Exhibit Index following the signature page. Certain of such
exhibits, which have heretofore been filed with the Securities and Exchange
Commission and which are designated by reference to their exhibit numbers in
prior filings are incorporated herein as exhibits by such reference and made a
part hereof.

     (b) No reports on Form 8-K were filed during the quarter ended March 31,
1998.

                                       12

<PAGE>


                                  SIGNATURES


     Pursuant to the requirements of the Securities Exchange Act of 1934, the
Registrant has duly caused this report to be signed on its behalf by the
undersigned thereunto duly authorized.


                                                QuesTech, Inc.
                                       --------------------------------
                                                 (Registrant)




Date:   May 6, 1998                         V. L. Salvatori
     ----------------------            --------------------------------
                                          Vincent L. Salvatori
                                          Chief Executive Officer and
                                          Chairman of the Board



Date:   May 6, 1998                         J. P. O'Connell, Jr.
     ----------------------            --------------------------------
                                          Joseph P. O'Connell, Jr.
                                          Vice President and
                                          Chief Financial Officer





                                       13
<PAGE>

                               INDEX TO EXHIBITS
<TABLE>
<CAPTION>

                                                                   Sequential
Exhibit No.      Description                                      page numbers
- -----------      -----------                                      ------------
<S>            <C>                                              <C>
 3             Restated Articles of Incorporation                     *
               and Bylaws of the Registrant,
               incorporated by reference to Exhibit 3
               of the Registrant's Registration
               No. 2-88617

10.1           Officer and Managers Discretionary                     *
               Bonus Plan, as amended and restated, 
               incorporated by reference to
               Exhibit 10(d) of Registrant's Annual 
               Report on Form 10-K for the
               period ended December 31, 1987

10.2           QuesTech Variable Deferral Plan                        *
               incorporated by reference to Exhibit
               10(k) of Registrant's Annual Report 
               on Form 10-K for the period
               ended December 31, 1987

10.3           Limited Partnership Agreement with                     *
               respect to the Kitty Hawk Office Center 
               incorporated by reference to Exhibit 10(v) 
               of Registrant's Annual Report on Form 
               10-K for the period ended December 31, 1989

10.5           Amended QuesTech, Inc. Officers and                    *
               Managers Deferred Compensation Plan 
               incorporated by reference to Exhibit 10(t)
               of Registrant's Annual Report on Form 10-K 
               for the period ended December 31, 1992

10.6           Lease dated November 24, 1993 between                  *
               Louis Esposito and the Registrant
               incorporated by reference to Exhibit
               10(x) of Registrant's Annual Report
               on Form 10-K for the period ended
               December 31, 1993

10.7           QuesTech, Inc. Stock Employee Compen-                  *
               sation Trust incorporated by reference
               to Exhibit 10(y) of Registrant's Annual 
               Report on Form 10-K for the 
</TABLE>


                                       14
<PAGE>

<TABLE>

<S>            <C>                                                    <C>    
               period ended December 31, 1993

               (a)  Amended and Restated Stock                        *
                    Employee Compensation Trust
                    incorporated by reference to
                    Exhibit 10(q) of Registrant's
                    Annual Report on Form 10-K for
                    the period ended December 31, 1995

               (b)  Amended and Restated Stock Employee              32
                    Compensation Trust dated March 25,
                    1998

10.8           1994 Incentive Stock Option Plan                       *
               incorporated by reference to Exhibit 10(aa)
               of Registrant's Annual Report on Form 10-K 
               for the period ended December 31, 1994

               (a)  Amendment to 1994 Incentive Stock                 *
                    Option Plan dated November 15,
                    1995 incorporated by reference to
                    Exhibit 10(p) of Registrant's
                    Annual Report on Form 10-K for
                    the period ended December 31, 1995

10.9           Lease dated March 14, 1995 between John                *
               Hancock Mutual Life Insurance Company
               and the Registrant incorporated by
               reference to Exhibit 10(cc) of Regis-
               trant's Annual Report on the Form 10-K
               for the period ended December 31, 1994

10.10          Amended and Restated Loan and Security                 *
               Agreement between Signet Bank and the
               Registrant, dated June 3, 1996 incorp-
               orated by reference to Exhibit 10(r) of
               Registrant's Quarterly Report on Form
               10-Q for the period ended June 30, 1996

               (a)  Amendment No. 1, dated May 31, 1997               *
                    1997, to the Amended and Restated
                    Loan and Security Agreement between
                    between Signet Bank and Registrant,
                    incorporated by reference to
                    Exhibit 10(t) of Registrant's
                    Quarterly Report on Form 10-Q for
                    the period ended June 30, 1997
</TABLE>


                                       15
<PAGE>


<TABLE>

<S>          <C>                                                    <C>    
               (b)  Amendment No. 2, dated December 23,               *
                    1997, to the Amended and Restated
                    Loan and Security Agreement between
                    Signet Bank and Registrant, incorpor-
                    ated by reference to Exhibit 10.10(b)
                    of registrant's Annual Report on
                    Form 10-K for the period ended
                    December 31, 1997

               (c)  Amendment No. 3, dated April 5, 1998,            19
                    to the Amended and Restated Loan and
                    Security Agreement between First
                    Union National Bank, successor by
                    merger to Signet Bank and Registrant

               (d)  Amendment No. 4, dated April 28, 1998,           26
                    to the Amended and Restated Loan and
                    Security Agreement between First
                    Union National Bank, successor by
                    merger to Signet Bank and Registrant

10.11          Equipment Lease between General                        *
               Electric Capital Corporation and
               Registrant, dated October 24, 1996 
               incorporated by reference to Exhibit 10(x)
               of Registrant's Quarterly Report on Form 10-Q
               for the period ended September 30, 1996

10.12          1996 Incentive Stock Option Plan dated                 *
               May 24, 1996, incorporated by reference to 
               Exhibit 10(a)(i) of Registrant's Annual Report
               on Form 10-K for the period ended 
               December 31, 1996

               (a)  Amendment No. 1, dated March 15,                  *
                    1997, to 1996 Incentive Stock
                    Option Plan, incorporated by
                    reference to Exhibit 10.12(a) of
                    Registrant's Annual Report on
                    Form 10-K for the period ended
                    December 31, 1997

10.13          Stock Option Plan for Non-employee                     *
               Directors, dated November 1, 1996,
               incorporated by reference to Exhibit
               10(a)(ii) of Registrant's Annual
               Report on Form 10-K for the period
               ended December 31, 1996
</TABLE>


                                       16
<PAGE>


<TABLE>

<S>            <C>                                                    <C>    
10.14          Sixth Amended Employment Agreement                     *
               between Vincent L. Salvatori and Registrant, 
               dated November 24, 1997, incorporated by 
               reference to Exhibit 10.14 of Registrant's
               Annual Report on Form 10-K for the period 
               ended December 31, 1997

10.15          Third Amended Employment Agreement                     *
               between Gerald F. Mayefskie and Registrant,
               dated November 17, 1997, incorporated by 
               reference to Exhibit 10.15 of Registrant's
               Annual Report on Form 10-K for the period 
               ended December 31, 1997

10.16          First Amendment to Deed of Lease                       *
               between John Hancock Mutual Life
               Insurance Company and the Registrant,
               dated December 31, 1997, incorporated
               by reference to Exhibit 10.16 of
               Registrant's Annual Report on Form
               10-K for the period ended
               December 31, 1997

21             Subsidiaries of the Registrant,                        *
               incorporated by reference to Exhibit
               21 of Registrant's Annual Report on 
               Form 10-K for the period ended 
               December 31, 1997

27             Financial Data Schedule                               48
</TABLE>

 * Previously filed; incorporated herein by reference.


                                       17

<PAGE>

                                                                EXHIBIT 10.7(b)

                               QUESTECH, INC.
          AMENDED AND RESTATED STOCK EMPLOYEE COMPENSATION TRUST


     THIS AMENDED AND RESTATED TRUST AGREEMENT (the "Agreement") is made
effective as of March 25, 1998, by and among QuesTech, Inc., a Virginia
corporation, and EDWARD G. BROENNIMAN, GERALD F. MAYEFSKIE, SEBASTIAN P.
MUSCO, VINCENT RUSSO and VINCENT L. SALVATORI, as individual trustees, and
their successors (each, individually, a "Trustee," and collectively, the
"Trustees");

                            W I T N E S S E T H:

     WHEREAS, the Company established a Stock Employee Compensation Trust (the
"Trust") pursuant to an Amended Stock Employee Compensation Trust Agreement
effective as of December 31, 1993 (the "Trust Agreement");

     WHEREAS, the Trustees desire to act as trustees of the Trust, and to hold
legal title to the assets of the Trust, in trust, for the purpose hereinafter
stated and in accordance with the terms hereof;

     WHEREAS, the Company has previously adopted the Plans (as defined below);

     WHEREAS, the Company desires to provide assurance of the availability of
the shares of its common stock necessary to satisfy certain of its obligations
under the Plans (as defined below);

     WHEREAS, the Company desires that the assets to be held in the Trust Fund
(as defined below) should be principally or exclusively securities of the
Company and, therefore, expressly waives any diversification of investments that
might otherwise be necessary, appropriate, or required pursuant to applicable
provisions of law;

     WHEREAS, the members of the Board of Directors of the Company have been
appointed as Trustees and have accepted such appointment as of the date set
forth first above; and

     WHEREAS, the Company and the Trustees desire to amend and restate the Trust
Agreement on the terms and conditions set forth herein;

     NOW, THEREFORE, the parties hereto hereby establish the Trust and agree
that the Trust will be comprised, held and disposed of as follows:

1. TRUST, TRUSTEE AND TRUST FUND

     1.1. Trust. This Agreement and the Trust shall be known as the QuesTech,
          Inc. Stock Employee Compensation Trust. The parties intend that the
          Trust will be an independent legal entity with title to and power to
          convey all of its assets. The parties hereto further intend that the
          Trust not be subject to the Employee Retirement Income Security Act of
          1974, as amended ("ERISA'). However, all decisions and interpretations
          by the Trustee shall be governed by the arbitrary and capricious
          standard, as interpreted under 


                                        1
<PAGE>

          applicable ERISA law. The assets of the Trust will be held, invested
          and disposed of by the Trustee, in accordance with the terms of the
          Trust.

     1.2. Trustee. The Trustees named above are hereby designated as the
          trustees hereunder, to receive, hold, invest, administer and
          distribute the Trust Fund in accordance with this Agreement, the
          provisions of which shall govern the power, duties and
          responsibilities of the Trustees.

     1.3. Trust Fund. The assets held at any time and from time to time under
          the Trust collectively are herein referred to as the "Trust Fund" and
          shall consist of the Common Stock of the Company, contributions
          received by the Trustee, proceeds of any loans, investments and
          reinvestment thereof, the earnings and income thereon, less
          disbursements therefrom. Except as herein otherwise provided, title to
          the assets of the Trust Fund shall at all times be vested in the
          Trustees and securities that are part of the Trust Fund shall be held
          in such manner that the Trustees' name and the fiduciary capacity in
          which the securities are held are fully disclosed, subject to the
          right of the Trustees to hold title in bearer form or in the name of a
          nominee, and the interests of others in the Trust Fund shall be only
          the right to have such assets received, held, invested administered
          and distributed in accordance with theprovisions of the Trust.

     1.4. Trust Fund Subject to Claims. Notwithstanding any provision of this
          Agreement to the contrary, the Trust Fund shall at all times remain
          subject to the claims of the Company's general creditors under federal
          and state law.

          In addition, the Chief Executive Officer of the Company shall have the
          duty to inform the Trustees in writing of the Company's insolvency. If
          a person claiming to be a creditor of the Company alleges in writing
          to any Trustee that the Company has become insolvent, the Chief
          Executive Officer shall determine the validity of such claims and if
          found to be valid, shall notify the Trustees to discontinue
          allocations pursuant to Article 3.

          Unless the Trustees have actual knowledge of the Company's insolvency,
          or have received notice from the Company or a person claiming to be a
          creditor alleging that the Company is insolvent, the Trustees shall
          have no duty to inquire whether the Company is insolvent. The Trustees
          may in all events rely on such evidence concerning the Company's
          solvency as may be furnished to the Trustees that provides the
          Trustees with a reasonable basis for making a determination concerning
          the Company's insolvency.

          If at any time the Trustees have determined that the Company is
          insolvent, the Trustees shall discontinue allocations pursuant to
          Article 3 and shall hold the Trust Fund for the benefit of the
          Company's general creditors. Nothing in this Trust Agreement shall


                                        2
<PAGE>

          in any way diminish rights of employees as general creditors of the
          Company with respect to benefits due under the Plan(s) or otherwise.

          The Trustees shall resume allocations pursuant to Article 3 only after
          the Trustees have determined that the Company is not insolvent (or is
          no longer insolvent).

     1.5. Definitions. In additional to the terms defined in the preceding
          portions of this Agreement, certain capitalized terms have the
          meanings set forth below:

     "Board of Directors" means the board of directors of the Company.

     "Calculation Period" means a period consisting of a calendar year.

     "Change of Control" means any of the following events:

               (a)  an acquisition by an individual, entity or group (within
                    the meaning of Section 13(d)(3) or 14(d)(2) of the
                    Securities Exchange Act of 1934, as amended (the "Exchange
                    Act") of beneficial ownership (within the meaning of Rule
                    13d-3 promulgated under the Exchange Act) of fifty-one
                    percent (51%) or more of the combined voting power of the
                    then outstanding voting securities of the Company;
                    provided, however,that the following acquisitions shall
                    not constitute a Change in Control:  (i) an acquisition by
                    or directly from the Company, (ii) an acquisition by any
                    employee benefit plan or trust sponsored or maintained by
                    the Company; and (iii) any acquisition described in
                    subclauses (A) or (B) of subsection (b) below; or

               (b)  approval by the stockholders of the Company of (i) a
                    complete dissolution or liquidation of the Company, (ii)
                    a sale or other disposition of all or substantially all of
                    the Company's assets or (iii) areorganization, merger, or
                    consolidation ("Business Combination") unless either (A)
                    all or substantially all of the stockholders of the
                    Company immediately prior to the Business Combination own
                    more than fifty percent (50%) of the voting securities of
                    the entity surviving the Business Combination, or the
                    entity which directly or indirectly controls such
                    surviving entity, in substantially the same proportion as
                    they owned the voting securities of the Company
                    immediately prior   thereto, or (B) the consideration
                    (other than cash paid in lieu of   fractional shares or
                    payment upon perfection of appraisal rights) issued to
                    stockholders of the Company in the Business Combination is
                    solely common stock which is publicly traded on an
                    established    securities exchange in the United States or
                    on the National Association of Securities Dealers'
                    Automated Quotation System ("NASDAQ").

                                        3
<PAGE>


          "Code" means the Internal Revenue Code of 1986, as amended.

          "Company" means QuesTech, Inc., a Virginia corporation, or any
               successor thereto. References to the Company shall include its
               subsidiaries where appropriate.

          "Company Stock" means shares of common stock, par value $0.05 per
               share, issued by the Company or any successor securities.

          "Excess Shares" has the meaning set forth in Section 3.3.

          "Extraordinary Dividend" means any dividend or other distribution of
               each or other property (other than Company Stock) made with
               respect to Company Stock, which the Board of Directors declares
               generally to be other than an ordinary dividend.

          "Fair Market Value" means as of any date the average of the highest
               and lowest report sales price, determined in the regular way on
               such date (or if such date is not a trade day, then on the most
               recent prior date which is a trading day) of a share of Company
               Stock as reported on the composite tape, or similar reporting
               system, for issues listed on NASDAQ (or, if the Company Stock is
               no longer traded on the NASDAQ Exchange, on such other national
               securities exchange on which the Company Stock is listed or
               national securities or central market system upon which
               transactions in Company Stock are reported, as either shall be
               designated by the Board of Directors for the purposes hereof) or
               if sales of Common Stock are not reported in any manner specified
               above, the average of the high bid and low asked quotations on
               such date (or if such date is not a trading day, then on the most
               recent prior date which is a trading day) in the over-the-counter
               market as reported by NASDAQ or, if not so reported, by National
               Quotation Bureau, Incorporated or similar organization selected
               by the Board of Directors.

          "Loans" means (a) the loan and extension of credit to the Trust
               evidenced by the promissory note made and authorized by the Trust
               dated December 31, 1993, executed by the Chairman of the Company
               as agent for the Trustees, with which the Trust purchased a
               portion of the Company Stock; (b) the loan and extension of
               credit to the Trust evidenced by the promissory note made and
               authorized by the Trust dated March 25, 1998, executed by the
               Chairman of the Company as agent for the Trustee, with which the
               Trust purchased a portion of the Company Stock; and (c) any other
               loan by the Company to the Trust for the purpose of purchasing
               Company Stock.

          "Plans" or "QTI Plans" means the employee benefit plans and 
               non-employee directors stock option plan listed on Schedule A 
               hereto as the same may be amended from time to time by the 
               Board of Directors, including any successors thereto, and any 
               other employee benefit plan or non-employee directors stock 

                                        4
<PAGE>

               option plans of the Company or its subsidiaries designated as 
               such by the Board of Directors.

          "Participant" means as of any date any individual who is employed by
               the Company or any subsidiary of the Company or is a non-employee
               director of the Company or any subsidiary of the Company as of
               such date and is a participant in a Plan.

          "QTI Plan Participant Certification" means a certification to be
               delivered by the Participant in a QTI Plan to the Trustee
               pursuant to Section 5.4, which sets forth the directions made by
               each Participant as to voting or tendering of the Company Stock
               allocated to his account in the respective QTI Plan with respect
               to the voting or tendering decision at issue.

          "Suspense Account" means a separate account to be maintained by the
               Trustees to hold Excess Shares pursuant to the terms of Article 3
               hereof.

          "Trustee" means those persons and corporate entities or any successor
               trustee as appointed by the Board of Directors.

          "Trust Year" means the period beginning on the date hereof and ending
               on December 31, 1994, and each twelve (12) month period beginning
               on January 1 and ending on December 31 thereafter.

2. CONTRIBUTIONS AND DIVIDENDS

     2.1. Initial Contribution. For the initial Trust Year the Company has been
          credited with a contribution to the Trust in cash of Four Hundred
          Thirty-Two Thousand Five Hundred and 00/100 Dollars ($432,500.00),
          which enabled the Trustees to acquire 221,792 shares of Company Stock
          which have been and are being utilized for purposes of funding Common
          Stock issuances upon the exercise of stock options issued by the
          Company under the QTI Plans, as more specifically set forth in Section
          3.1 below. The Trust returned to the Company a promissory note in the
          principal sum of Four Hundred Thirty-Two Thousand Five Hundred and
          00/100 Dollars ($432,500.00), which note is the obligation of the
          Trust.

     2.2. Additional Contribution. For the Trust Year 1998 the Company shall be
          credited with a contribution to the Trust in cash of Two Million Three
          Hundred Twenty Four Thousand Two Hundred Ninety Three and 75/100
          Dollars ($2,324,293.75), which amount represents the fair market value
          of 296,847 shares of Company Stock on date of purchase thereof and
          which amount shall be used by the Trustees to acquire said 296, 847
          shares of Company Stock for purpose of funding Common Stock issuances
          upon the exercise of stock options issued by the Company under the QTI
          Plans, as more specifically set forth in Section 3.1 below. In
          recognition thereof, the Trust shall return to the Company a
          promissory note having a principal sum equal to the cash contribution
          made by the Company, which note shall be the obligation of the Trust.


                                        5
<PAGE>


     2.3. Repayment and Forgiveness of Loans. For each Trust Year in which Plan
          Participants exercise stock options under the QTI Plans, the Company
          may attribute to repayment of the Loans (in the form of a reduction of
          the principal amount outstanding thereunder) the cash exercise price
          received from such Plan Participants (a "Principal Reduction"). Unless
          otherwise expressly provided herein, the Trustees shall apply all cash
          contributions, dividends and earnings of the Trust to the payment of
          the Loans. Such payments shall be applied on a pro rata basis to each
          Loan outstanding based on the principal amount outstanding on such
          Loan in proportion to the aggregate principal amount outstanding on
          all Loans.

     2.4. Dividends. Except as otherwise provided herein, dividends paid in cash
          on Company Stock held by the Trust, including Company Stock held in
          the Suspense Account, shall be applied to repay principal due under
          the Loans. Dividends which are not in cash or in Company Stock
          (including Extraordinary Dividends, or portions thereof shall be
          reduced to cash by the Trustees and shall be applied to repay
          principal due under the Loans.

3. RELEASE AND ALLOCATION OF COMPANY STOCK

     3.1  Release of Shares. In exchange for each Principal Reduction (as
          provided in Section 2.2 above), the Trust shall release to the Company
          the number of shares of Common Stock for which stock options were
          exercised in connection with such Principal Reduction, which shares
          then may be registered in the name of the Plan Participant(s)
          exercising such options.

     3.2  Allocations. For the purposes of this Trust, shares of Company Stock
          shall be allocated as directed by the Trustees to the Plans and the
          Plan Participants as the Trustees may determine in accordance with
          the requirements of the QTI Plans. The Trustees' discretion shall be
          limited to the amounts allocated among the QTI Plans, with the
          allocation itself being mandatory. Subject to this Article 3, the
          shares have been allocated in the manner set forth on Schedule A
          hereto.

     3.3  Excess Shares. Shares which are not allocated pursuant to the
          preceding paragraph ("Excess Shares") shall be held by the Trustee in
          the Suspense Account and shall be allocated in accordance with the
          provisions of this Article 3.

4. COMPENSATION, EXPENSES AND TAX WITHHOLDING

          The Trustees shall not be entitled to compensation for their services
          as such. In the event a Trustee is substituted for the members of the
          Board of Directors of the Company, the Company may reimburse the
          reasonable legal, accounting and appraisal fees, expenses and other
          charges reasonably incurred in connection with the administration,
          management and distribution of the Trust Fund by such Successor
          Trustee.


                                        6
<PAGE>


5. ADMINISTRATION OF TRUST FUND

     5.1. Management and Control of Trust Fund. Subject to the terms of
          thisAgreement, the Trustees shall have exclusive authority, discretion
          and responsibility to manage and control the assets of the Trust Fund.

     5.2. Investment of Funds. Except as otherwise provided in Section 2.2 and
          in this Section 5.2, the Trustees shall invest and reinvest the Trust
          Fund exclusively in Company Stock, including any increases thereto
          resulting from the proceeds of a tender offer, recapitalization or
          similar transaction which, if not in Company Stock, shall be reduced
          to cash as soon as practicable. The Trustees may invest any portion of
          the Trust Fund temporarily pending investment in Company Stock,
          distribution or payment of expenses in (i) investments in United
          States Government Obligations with maturities of less than one (1)
          year, (ii) interest-bearing accounts including but not limited to
          certificates of deposit, time deposits, saving accounts and money
          market accounts with maturities of less than one (1 ) year in any
          bank, with aggregate capital in excess of One Billion Dollars
          ($1,000,000,000) and a Moody's Investor Services rating of at least
          P1, or an equivalent rating from a nationally recognized ratings
          agency, which accounts are insured by the Federal Deposit Insurance
          Corporation or other similar federal agency, (iii) obligations issued
          or guaranteed by any agency or instrumentality of the United States of
          America with maturities of less than one (1) year or (iv) short-term
          discount obligations of the Federal National Mortgage Association.

     5.3. Trustees' Administrative Powers. Except as otherwise provided herein,
          and subject to the Trustees' duties hereunder, the Trustees shall have
          the following powers and rights, in addition to those provided
          elsewhere in this Agreement or by law:

          (a)  to retain any asset of the Trust Fund;

          (b)  subject to Section 5.4 and Article 3, to sell, transfer,
               mortgage, pledge, lease or otherwise dispose of, or grant options
               with respect to any Trust Fund assets at public or private sale;

          (c)  with the concurrence of the Company, to borrow from any lender
               (including the Company pursuant to the Loans), to acquire
               Company Stock as authorized by this Agreement, to enter into
               lending agreements upon such terms (including reasonable
               interest and security for the loan and rights to renegotiate
               and prepay such loan) as may be determined by the Board of
               Directors; provided, however, that any collateral given by the
               Trustees for the Loans shall be limited to cash and property
               contributed by the Company to the Trust and dividends paid on
               Company Stock held in the Trust Fund and shall not include
               Company Stock acquired with the proceeds of Loans;


                                        7
<PAGE>


          (d)  to settle, submit to arbitration, compromise, contest, prosecute
               or abandon claims and demands in favor of or against the Trust
               Fund;

          (e)  to vote or to give any consent with respect to any such
               securities, including any Company Stock, held by the Trust either
               in person or by proxy for any purpose provided that the Trustee
               shall vote, tender or exchange all shares of Company Stock as
               provided in Section 5.4;

          (f)  to exercise any of the powers and rights of any individual owner
               with respect to any asset of the Trust Fund and to perform any
               and all other acts that in their judgment are necessary or
               appropriate for the proper administration of the Trust Fund, even
               though such powers, rights and acts are not specifically
               enumerated in this Agreement;

          (g)  to employ such accountants, actuaries, investment bankers,
               appraisers, other advisors and agents as may be reasonably
               necessary in collecting, managing, administering, investing,
               valuing, distributing and protecting the Trust Fund or the
               assets thereof or any borrowings of the Trustee made in
               accordance with Section 5.3(c); and to pay their reasonable
               fees and expenses, which shall be deemed to be expenses of the
               Trust and forwhich the Trustees shall be reimbursed in
               accordance with Section 4.1;

          (h)  to cause any asset of the Trust Fund to be issued, held or
               registered in the Trustees' name or in the name of their nominee,
               or in such form that title will pass by delivery, provided that
               the records of the Trustees shallindicate the true ownership of
               such assets;

          (i)  to utilize another entity as custodian to hold, but not invest or
               otherwise manage or control, some or all of the assets of the
               Trust Funds; and

          (j)  to consult with legal counsel (who may also be counsel for the
               Company generally) with respect to any of their duties or
               obligations hereunder; and to pay the reasonable fees and
               expenses of such counsel, which shall be deemed to be expenses of
               the Trust and for which the Trustees shall be reimbursed in
               accordance with Section 4.1.

          Notwithstanding the foregoing, neither the Trust nor the Trustees
          shall have any power to, and shall not, engage in any trade or
          business regarding the Trust Fund. All decisions by the Trustees shall
          be governed by a majority vote of the Trustees.

5.4. Voting And Tendering Of Company Stock.

     (a)  Voting of Allocated Company Stock. The Trustee shall exercise
          reasonable diligence to follow the directions of the Participants as


                                        8
<PAGE>


          to the manner in which shares of Company Stock held by the Trust are
          to be voted on each matter brought before an annual or special
          stockholders' meeting of the Company or the manner in which any
          consent is to be executed, in each case as provided below. Before each
          such meeting of stockholders, the Trustees shall cause to be
          furnished to each Participant of each QTI Plan, including
          non-qualified optionees, a copy of the proxy solicitation material
          received by the Trustees, together with a form requesting confidential
          instructions as to how to vote the shares of Company Stock held by the
          Trustees. Upon timely receipt of the Participant's Certification, the
          Trustees shall on each such matter vote thenumber of shares of Company
          Stock held by the Trust as follows:

          The Trustee shall, with respect to each QTI Plan, assign to each
          Participant, the number of shares (the "QTI Participant Directed
          Account") equal to the total number of shares of Common Stock covered
          by all of the Participant's option grants. Each share assigned to each
          Participant in accordance with the previous sentence shall be subject
          to such Participant's direction to the Trustees with respect to shares
          of Company Stock allocated to his account in such QTI Plan, as
          reflected in the Participant Certification. Any shares of Company
          Stock which remain undirected pursuant to the foregoing provisions
          shall be voted in proportion to the voting of the shares for which
          directions were received. Similar provisions shall apply in the case
          of any action by shareholder consent without a meeting.

     (b)  Voting of Unallocated Company Stock. The Trustees shall vote the
          unallocated Company stock on each matter brought before an Annual or
          Special Stockholders Meeting of the Company in the same proportion as
          they vote the allocated shares.

     (c)  Tender or Exchange of Company Stock. The Trustees shall use their
          best efforts timely to distribute or cause to be distributed to the
          Participants of a QTI Plan any written materials distributed to
          stockholders of the Company generally in connection with any tender
          offer or exchange offer, together with a form requesting
          confidential instructions on whether or not to tender or exchange
          shares of Company Stock held in the Trust. Upon timely receipt of
          the Participants' Certifications, the Trustees shall tender or not
          tender the Participant Directed Amount for each Participant in
          accordancewith such Participant's direction in which he participates
          with respect to shares of Company Stock allocated to his account in
          such QTI Plan, as set forth in the Participant Certification. The
          Participant of any QTI Plan shall not be limited in the number of
          instructions to tender or withdraw from tender which it may give but
          shall not have the right to give instructions to tender or withdraw
          from tender after a reasonable time established by the Trustees. If
          the Trustees shall not receive timely instruction by means of the
          Participant's Certification as to the manner in which to respond to
          such a tender or exchange offer, the Trustee shall tender or
          exchange or not tender or exchange any shares of Company Stock with
          respect to which the Participant of any QTI Plan has the right of


                                        9
<PAGE>


          direction in the same proportion as the shares of Company Stock for
          which the Trustees are directed.

     (d)  The Company shall maintain appropriate procedures to ensure that all
          instructions by Participants are collected, tabulated, and
          transmitted by the Participants to the Trustees without being
          divulged or released to any other person affiliated the Company or
          its affiliates.  All actions taken by Participants and the contents
          of the Participant's Certification shall be held confidential by the
          Trustees and shall not be divulged or released to any person, other
          than (i) agents of the Trustees who are not affiliated with the
          Company or its affiliates or (ii) by virtue of the execution by the
          Trustees of any proxy, consent or letter of transmittal for the
          shares of Company Stock held in the Trust.

5.5. Indemnification.

          (a)  To the extent lawfully allowable, the Company shall and hereby
               does indemnify and hold harmless each Trustee from and against
               any claims, demands, actions, administrative or other
               proceedings, causes of action, liability, loss, cost, damage or
               expense (including reasonable attorney's fees), which may be
               asserted against it, in any way arising out of or incurred as
               a result of its action or failure to act in connection with the
               operation and administration of the Trust; provided that such
               indemnification shall not apply to the extent that the Trustee
               has acted in willful or negligent violation of applicable law
               or its duties under this Trust or in bad faith. No Trustee
               shall be under He liability to any person for any loss of any
               kind which may result (i) by reason of any action taken by the
               Trustee in accordance with or contrary to the direction of any
               Participant acting pursuant to Section 5.4(b) (hereinafter
               collectively referred to as the "Directing Participants"), (ii)
               by reason of the Trustee's failure to exercise any power or
               authority or to take any action hereunder because of the
               failure of any such Directing Participant to give directions to
               the Trustee, as provided for in this Agreement, or (iii) by
               reason of any act or omission of any of the Directing
               Participants with respect to its duties under this Trust. Each
               Trustee shall be fully protected in acting upon any instrument,
               certificate, or paper delivered by any Participant or
               beneficiary and believed in good faith by the Trustee to be
               genuine and to be signed or presented by the proper persons or
               persons, and the Trustee shall be under no duty to make any
               investigation or inquiry as to any statement contained in any
               such writing, but may accept the same as conclusive evidence of
               the truth and accuracy of the statements therein contained.

          (b)  The Company may, but shall not be required to, maintain liability
               insurance to insure its obligations hereunder. If any payments
               made by the Company, or the Trust pursuant to this indemnity are
               covered by insurance, the Company or the Trust 


                                        10
<PAGE>

               (as applicable) shall be subrogated to the rights of the
               indemnified party against the insurance company.

          (c)  Without limiting the generality of the foregoing, the Company
               may, at the request of any Trustee, advance to the Trustee
               reasonable amounts of expenses, including reasonable attorneys'
               fees and expenses, which the Trustee advises have been incurred
               in connection with its investigation or defense of any claim,
               demand, action, cause of action, administrative or other
               proceeding arising out of or in connection with the Trustee's
               performance of its duties under this Agreement.

     5.6. General Duty to Communicate to the Board of Directors. The Trustees
          shall promptly notify the Board of Directors of all communications
          with or from any government agency or with respect to any legal
          proceeding with regard to the Trust and with or from any Plan
          Participants concerning their entitlements under the Plans or the
          Trust.

6. ACCOUNTS AND REPORTS OF TRUSTEES

     6.1. Records and Accounts of Trustees. The Trustees shall maintain accurate
          and detailed records and accounts of all transactions of the Trust,
          which shall be available at ail reasonable times for inspection or
          audit by any person designated by the Company and which shall be
          retained as required by applicable law.

     6.2. Fiscal Year. The fiscal year of the Trust shall be the twelve (12)
          month period beginning on January 1 and ending on December 31.

     6.3. Reports of Trustees. The Trustees shall prepare and present to the
          Board of Directors a report for the period ending on the last day of
          each fiscal year, and for such shorter periods as the Board of
          Directors may reasonably request, listing all securities and other
          property acquired and disposed of and all receipts, disbursements and
          other transactions effected by the Trust after the date of the
          Trustees' last account, and further listing all cash, securities, and
          other property held by the Trust, together with the fair market value
          thereof, as of the end of such period. In addition to the foregoing
          the report shall contain such information regarding the Trust Fund's
          assets and transactions as the Board of Directors in its discretion
          may reasonably request.

     6.4. Final Report. In the event of the resignation or removal of a Trustee
          hereunder, the Board of Directors may request and the Trustee shall
          then with reasonable promptness submit, for the period ending on the
          effective date of such resignation or removal, a report similar in
          form and purpose to that described in Section 6.3.

7. SUCCESSION OF TRUSTEE

     7.1. Resignation of Trustee. Any of the Trustees or any successor thereto
          may resign as Trustee hereunder at any time upon delivering a 


                                       11
<PAGE>

           written notice of such resignation, to take effect sixty (60)
           days after the delivery thereof to the Secretary of the Company,
           unless the Board of Directors accepts shorter notice; provided,
           however, that no such resignation shall be effective until a
           Successor Trustee has assumed the office of Trustee hereunder.

     7.2. Removal of Trustee. Any of the Trustees or any successor thereto may
          be removed by the Company by delivering to the Trustee so removed an
          instrument executed by the Board of Directors. Such removal shall take
          effect at the date specified in such instrument.

     7.3. Appointment of Successor Trustee. Whenever any one of the Trustees or
          any successor thereto shall resign or be removed or a vacancy in the
          position shall otherwise occur, the Board of Directors shall use its
          best efforts to appoint a Successor Trustee as soon as practicable
          after receipt of a notice described in Section 7.1, or the delivery to
          the Trustee of a notice described in Section 7.2, as the case may be,
          but in no event more than one hundred eighty (180) days after receipt
          or delivery, as the case may be, of such notice. A Successor Trustee's
          appointment shall not become effective until such successor shall
          accept such appointment by delivering its acceptance in writing to the
          Company. If a successor is not appointed within such one hundred
          eighty (180) day period, the Trustee, at the Company's expense, may
          petition a court of competent jurisdiction for appointment of a
          successor.

     7.4. Succession to Trust Fund Assets. The title to all property held
          hereunder shall vest in any successor Trustee acting pursuant to the
          provisions hereof without the execution or filing of any further
          instrument, but a resigning or removed Trustee shall execute all
          instruments and do all acts necessary to vest title in the successor
          Trustee. Each successor Trustee shall have, exercise and enjoy all of
          the powers, both discretionary and ministerial, herein conferred upon
          its predecessors. A successor Trustee shall not be obliged to examine
          or review the accounts, records, or acts of, or property delivered by,
          and previous Trustee and shall not be responsible for any action or
          any failure to act on the part of any previous Trustee.

     7.5. Continuation of Trust. In no event shall the legal disability,
          resignation or removal of a Trustee terminate the Trust, but the Board
          of Directors shall forthwith appoint a successor Trustee in accordance
          with Section 7.3 to carry out the terms of the Trust.

     7.6. Continuance of Trustees' Powers in Event of Termination of the Trust.
          In the event of the termination of the Trust, as provided herein, the
          Trustees shall dispose of the Trust Fund in accordance with the
          provisions hereof. Until the final distribution of the Trust Fund, the
          Trustees shall continue to have all powers provided hereunder as
          necessary or expedient for the orderly liquidation and distribution of
          the Trust Fund.



                                       12
<PAGE>


8. AMENDMENT OR TERMINATION

     8.1. Amendments. Except as otherwise provided herein, the Company may amend
          the Trust at any time and from time to time in any manner which it
          deems desirable, provided that no amendment which would adversely
          effect the contingent rights of Plan participants may change (i) the
          allocation requirement in Section 3.1 or Section 3.2, (ii) the terms
          of Section 3.3, (iii) the provisions of Section 2.2 as to the use of
          dividends, (iv) the provisions of Section 5.4, (v) the provisions of
          Section 8.2, or (vi) the provisions of this Section 8.1.
          Notwithstanding the foregoing, the Company shall retain the power
          under all circumstances to amend the Trust to correct any errors or
          clarify any ambiguities or similar issues of interpretation in this
          Agreement, such interpretation to be binding on all interested
          persons.

     8.2. Termination. Subject to the terms of this Section 8.2, the Trust shall
          terminate on December 31, 2008 or any earlier date on which the Loans
          are paid in full (the "Termination Date"). The Board of Directors may
          terminate the Trust at any time prior to the Termination Date. The
          Trust shall also terminate automatically upon the Company giving the
          Trustee notice of a Change of Control. As soon as practicable after
          receiving notice from the Company of a Change of Control or upon any
          other termination of the Trust, the Trustee shall sell all of the
          Company Stock and other non-cash assets (if any) then held in the
          Trust Fund as directed by the Board of Directors in good faith taking
          into account the interests of a broad cross-section of individuals
          employed by the Company. The proceeds of such sale shall first be
          returned to the Company up to an amount equal to the principal amount,
          plus any accrued interest, of all Loans outstanding on the effective
          date of termination. The Company shall be deemed to have forgiven all
          remaining amounts then outstanding under all Loans. Any funds
          remaining in the Trust after such payment to the Company shall be
          distributed with reasonable promptness to a broad cross-section of
          Plan Participants or to individuals employed by the Company generally
          or to any benefit plan or trust in which a broad cross-section of
          individuals employed by the Company participate, as the Board of
          Directors may in good faith determine taking into account the best
          interests of the individuals employed by the Company.

     8.3. Form of Amendment or Termination. Any amendment or termination of the
          Trust shall be evidenced by an instrument in writing signed by an
          authorized officer of the Company, certifying that said amendment or
          termination has been authorized and directed by the Company or the
          Board of Directors, as applicable, and, in the case of any amendment,
          shall be consented to be signature of the Trustees, if required by
          Section 8.1.



                                       13
<PAGE>



9. MISCELLANEOUS

     9.1. Controlling Law. The laws of the Commonwealth of Virginia shall be the
          controlling law in all matters relating to the Trust, without regard
          to conflicts of law.

     9.2. Trustees Action. Any action required or permitted to be taken by the
          Trustees may be taken on behalf of the Trustees by any individual so
          authorized. The Company shall furnish to the Trustees the name and
          specimen signature of each member upon whose statement of a decision
          or direction the Trustees are authorized to rely. Until notified of a
          change in the identity of such person or persons, the Trustees shall
          act upon the assumption that there has been no change.

     9.3. Notices. All notices, requests, or other communications required or
          permitted to be delivered hereunder shall be in writing, delivered by
          registered or certified mail, return receipt requested as follows:

          To the Company:     QuesTech, Inc.
                              7600A Leesburg Pike
                              Falls Church, Virginia 22043
                              Attention: Vincent L. Salvatori
                                   Chairman & CEO

          To the Trustees:    Members of the Board of Directors
                              Of QuesTech, Inc.
                              c/o QuesTech, Inc.
                              7600A Leesburg Pike
                              Falls Church, Virginia 22043
                              Attention: Secretary

          Any party hereto may from time to time, by written notice given as
          aforesaid, designate any other address to which notices, requests or
          other communications addressed to it shall be sent.

     9.4. Severabiiitv. If any provision of the Trust shall be held illegal,
          invalid or unenforceable for any reason, such provision shall not
          affect the remaining parts hereof, but the Trust shall be construed
          and enforced as if said provision had never been inserted herein.

     9.5. Protection of Persons Dealing with the Trust. No person dealing with
          the Trustees shall be required or entitled to monitor the application
          of any money paid or property delivered to the Trustees, or determine
          whether or not the Trustees are acting pursuant to authorities granted
          to them hereunder or to authorizations or directions herein required.

     9.6. Tax Status of Trust. It is intended that the Company, as grantor
          hereunder, be treated as the owner of the entire trust and the trust
          assets under Section 671, et seq. of the Code. Until advised
          otherwise, the Trustee may presume that the Trust is so 


                                       14
<PAGE>


          characterized for federal income tax purposes and shall make ail
          filings of tax returns on that presumption.

     9.7. Participants to Have No Interest in the Comnanv by Reason of the
          Trust. Neither the creation of the Trust nor anything contained in the
          Trust shall be construed as giving any person, including any
          individual employed by the Company or any subsidiary of the Company,
          any equity or interest in the assets, business, or affairs of the
          Company except to the extent that any such individuals are entitled to
          exercise stockholder rights with respect to Company Stock pursuant to
          Section 5.4.

     9.8. Nonassignability. No right or interest of any person to receive
          distributions from the Trust shall be assignable or transferable, in
          whole or in part, either directly or by operation of law or otherwise,
          including, but not by way of limitation, execution, levy, garnishment,
          attachment, pledge, or bankruptcy, but excluding death or mental
          incompetency, and no right or interest of any person to receive
          distributions from the Trust shall be subject to any obligation or
          liability or any such person, including claims for alimony or the
          support of any spouse or child.

     9.9. Gender and Plurals. Whenever the context requires or permits, the
          masculine gender shall include the feminine gender and the singular
          form shall include the plural form and shall be interchangeable.
 
     9.10 Counterparts. This Agreement may be executed in any number of
          counterparts, each of which shall be considered an original.

     IN WITNESS WHEREOF, the Company and the Trustee have caused this Agreement
to be signed, and their seals affixed hereto, by their authorized officers all
as of this day, month and year first above written.

ATTEST:                            QUESTECH, INC.


M. P. Rivera                       V. L. Salvatori
- -------------------------          -----------------------------------
Corporate Secretary                VINCENT L. SALVATORI
                                   Chairman & Chief Executive Officer

TRUSTEES:


Edward G. Broenniman               Gerald F. Mayefskie
- -------------------------          -----------------------------------
EDWARD G. BROENNIMAN               GERALD F. MAYEFSKIE


Sebastian P. Musco                 Vincent Russo
- -------------------------          -----------------------------------
SEBASTIAN P. MUSCO                 VINCENT RUSSO


                                   V. L. Salvatori
                                   -----------------------------------
                                   VINCENT L. SALVATORI


                                       15
<PAGE>

                                                              SCHEDULE A
                                                                      TO
                               AMENDED STOCK EMPLOYEE COMPENSATION TRUST

1. QuesTech, Inc. 1982 Incentive Stock Option Plan
2. QuesTech, Inc. 1994 Incentive Stock Option Plan
3. QuesTech, Inc. 1996 Incentive Stock Option Plan
4. QuesTech, Inc. 1996 Stock Option Plan for Non-Employee Directors



                                       16

<PAGE>

                                                               EXHIBIT 10.10(c)

    AMENDMENT NO. 3 TO AMENDED AND RESTATED LOAN AND SECURITY AGREEMENT

     THIS AMENDMENT NO. 3 TO AMENDED AND RESTATED LOAN AND SECURITY AGREEMENT
(this "Amendment"), dated as of the 5th Day of April, 1998 is made by and among
QUESTECH, INC., a Virginia corporation ("QUESTECH"), QUESTECH SERVICE COMPANY, a
Virginia corporation formerly known as Engineering Resources, Inc. ("QTSC"),
QUESTECH PACKAGING, INC., a Virginia corporation ("QTPI"; QuesTech, QTSC, and
QTPI are referred to individually as a "Borrower" and collectively as the
'Borrowers"), and FIRST UNION NATIONAL BANK, a national banking association,
successor by merger to Signet Bank, a Virginia banking corporation (the
"Lender").

RECITALS

A. The Lender and the Borrowers entered into an Amended and Restated Loan and
Security Agreement dated as of June 3,1 996 (as amended through the date hereof,
the Agreement) pursuant to which the Lender has agreed to extend credit to the
Borrowers, and the Borrowers have agreed to obtain credit from the Lender, on
the terms and conditions set forth in such Agreement.

B. The Borrowers have requested that the Lender make certain modifications to
the Agreement, including increasing the Maximutn Amount, and the Lender has
consented to such request subject to the execution of this Amendment and the
satisfaction of the conditions specified herein.

C. The Borrowers and the Lender now desire to execute this Amendment to set
forth their agreements with respect to the modifications to the Agreement.

     Accordingly, for good and valuable consideration, the receipt and
sufficiency of which are hereby acknowledged, the Lender and the Borrowers agree
as follows:

     SECTION 1. Definitions. Capitalized terms used in this Amendment and not
     defined herein are deemed in the Agreement.

     SECTION 2. Amendments to Agreement. The Agreement is hereby amended as
     follows:

     Amendments to Section 1. Section 1 of the Agreement is amended as follows:

          (a) Commitment Fee. The definition of the term Commitment Fee is
     replaced in its entirety with the following definition:

          "Commitment FEE" means the quarterly fee to be paid by the Borrowers
     to the Lender pursuant to Section 2.5 hereof in consideration of the
     commitment by the Lender to make Revolving Loans hereunder. The Commitment
     Fee due for each calendar quarter (or portion thereof) shall equal the
     product of the Commitment Fee Rate in effect for such quarter (or portion
     thereof) multiplied by the difference between $6,500,000.00 and the sum of
     the average daily principal balance of the Revolving Loans during such
     quarter (or applicable portion thereof) plus the average 


                                        1
<PAGE>


     daily face amount of all Letters of Credit outstanding during such quarter
     (or applicable portion thereof).

          (b) Maximum Amount. The definition of the term Maximum Amount is
     replaced in its entirety with the following definition:

          "Maximum Amount" means, at any time, the lesser of (a) the difference
     between $6,500,000.00 and the Letter of Credit Exposure as such time or (b)
     the then applicable Borrowing Base.

          (c) Revolving Note. The definition of the term Revolving Note is
     replaced in its entirety with the following definition:

          Revolving Note" means the promissory note in form and substance
     acceptable to the Lender in the original principal amount of $6,500,000.00
     (as it may be amended, modified supplemented or replaced from time to time)
     evidencing the obligation of the Borrower tO pay the principal amount of
     the Revolving Loans together with interest on the Revolving Loans.

     SECTION 3. Representations and Warranties of Borrowers. The Borrower,
     jointly and severally represents and warrants to the Lender that:

          (a) Each Borrower has the power and authority to enter into and to
     perform this Amendment, to execute and deliver all documents relating to
     this Amendment, and to incur the obligations provided for in this
     Amendment, all of which have been duly authorized and approved in
     accordance with the Borrower's corporate documents;

          (b) This Amendment, together with all documents executed pursuant
     hereto, shall constitute when executed the valid and legally binding
     obligations of the Borrowers in accordance with their respective terms;

          (c) Except with respect to events or circumstances occurring
     subsequent to the date thereof and known to the Lender, all representations
     and warranties made in the Agreement are true and correct as of the date
     hereof, with the same force and effect as if all representations and
     warranties were fully set forth herein;

          (d) Each Borrower's obligations under the Loan Documents remain valid
     and enforceable obligations, and the execution and delivery of this
     Amendment and the other documents executed in connection herewith shall not
     be construed as a novation of the Agreement or any of the other Loan
     Documents; and

          (e) As of the date hereof, no Borrower has any offsets or defenses
     against the payment of any of the Obligations.

     SECTION 4. Waiver of Claims. As a specific inducement to the Lender without
     which the Borrowers acknowledges the Lender would not enter into this
     Amendment and the other documents executed in connection herewith, each
     Borrower hereby waives any and all claims that it may have against the
     Lender, as of the date hereof, arising out of or relating to the 


                                        2
<PAGE>



     Agreement or any other Loan Document whether sounding in contract, tort or
     any other basis.

     SECTION 5. Conditions of Effectiveness. This Amendment shall become
     effective when, and only when, the Borrowers have executed and completed
     this Amendment and a Revolving Note in form and substance acceptable to the
     Lender, have delivered such original, executed documents to the Lender, and
     have reimbursed the Lender for the Lender's costs and expenses incurred in
     connection with this Amendment.

     SECTION 6. Miscellaneous.

          6.1 Reference To Agreement and Note. Upon the effectiveness of this
     Amendment, each reference in the Agreement to "this Agreement" and each
     reference in the other Loan Documents to the Agreement, shall mean and be a
     reference to the Agreement as amended hereby and each reference in the
     Agreement and the other Loan Documents to the "Note" shall mean and be a
     reference to the applicable Note executed by the Borrowers and delivered to
     the Lender pursuant to Section 5 hereof.

          6.2 Effect on Loan Documents. Except as specifically amended above,
     the Agreement and all other Loan Documents shall remain in full force and
     effect and are hereby ratified and confirmed. Without limiting the
     generality of the foregoing, all Collateral given to secure the Obligations
     of the Borrowers under the Agreement and the other Loan Documents prior to
     the date hereof does and shall continue to secure all Obligations of the
     Borrowers under the Agreement, as amended hereby and the other Loan
     Documents, and, except as provided in the Agreement and the other Loan
     Documents, no such Collateral shall be released until all conditions to
     such release as contained in the Loan documents are satisfied or all
     Obligations are satisfied and completely discharged.

          6.3 No Waiver. The execution, delivery and effectiveness of this
     Amendment shall not operate as a waiver of any right, power or remedy of
     the Lender under any of the Loan Documents, nor constitute a waiver of any
     provision of any of the Loan Documents.

          6.4 Costs, Expenses and Taxes. The Borrowers, jointly and severally,
     agree to pay on demand all costs and expenses of the Lender in connection
     with the preparation, reproduction, execution and delivery of this
     Amendment and the other instruments and documents to be delivered
     hereunder, including the reasonable fees and out-of-pocket expenses of
     counsel for the Lender with respect thereto.

          6.5 Governing Law. This Amendment shall be governed by and construed
     in accordance with the laws of the Commonwealth of Virginia, without giving
     effect to conflict of law provisions.



                                        3
<PAGE>



     IN WITNESS WHEREOF, the Borrowers and the Lender have caused this Amendment
to be signed by their duly authorized representatives under seal all as of the
day and year first above written.

                          QUESTECH, INC., a Virginia corporation
ATTEST:


M. P. Rivera              By V. L. Salvatori
- -----------------------      -----------------------------------------------
(Asst.) Secretary            Vincent L. Salvatori, Chairman
[corporate seal]


                          QUESTECH SERVICE COMPANY, INC., a Virginia
                          corporation

ATTEST:


M. P. Rivera              By: V. L. Salvatori
- -----------------------      -----------------------------------------------
(Asst.) Secretary             Vincent L. Salvatori, Chairman
[corporate seed]


                          QUESTECH PACKAGING, INC., a Virginia
                          corporation

ATTEST:


M. P. Rivera              By: V. L. Salvatori
- -----------------------      -----------------------------------------------
(Asst.) Secretary             Vincent L. Salvatori, Chairman
[corporate seed]




                         FIRST UNION NATIONAL BANK, a national banking
                         association


                         By:  Robert Lee Reed
                            -----------------------------------------------
                              Robert Lee Reed, Assistant Vice President


                                        4
<PAGE>



Customer #
Note #
                                 REVOLVING NOTE

$8,000,000.00                                             28 April, 1998
                                                  ----------------------
                                                  Falls Church, Virginia

     FOR VALUE RECEIVED, QUESTECH, INC., a Virginia corporation ("QuesTech"),
QUESTECH SERVICE COMPANY, a Virginia corporation formerly known as Engineering
Resources, Inc. ("QTSC"), QUESTECH PACKAGING, INC., a Virginia corporation
("QTPI") and QT INFORMATION SCIENCES CORPORATION, a Virginia corporation
("QTISC"; QuesTech. QTSC, QTPI and QTISC are referred to individually as a
"Borrower" and collectively as the "Borrowers"), hereby jointly and severally
promise to pay to the order of FIRST UNION NATIONAL BANK, a national banking
association, successor by merger to Signet Bank, a Virginia banking corporation
(the "Lender"), at North Tower, 5th Floor, 7799 Leesburg Pike, Falls Church,
Virginia, or such other location as the holder hereof may in writing designate,
the principal sum of Eight Million and no/100 Dollars ($8,000,000.00) or such
lesser amount as shall equal the aggregate unpaid principal amount of the
Revolving Loans made by the Lender to the Borrowers in accordance with the Loan
Agreement in lawful money of the United States of America in immediately
available funds, on the Termination Date and to pay interest on the unpaid
principal amount of the Revolving Loans, at such office, in like money and
funds, for the period commencing on the date of each Revolving Loan until such
Revolving Loan shall be paid in full, at the rate or rates per annum and on the
dates provided in the Loan Agreement. The Borrowers may borrow, prepay without
penalty and reborrow hereunder in accordance with the provisions of the Loan
Agreement.

     This Revolving Note is the Revolving Note referred to in the Amended and
Restated Loan and Security Agreement dated as of June 3, 1996 among the Lender
and QuesTech. QTSC and QTPI (as amended, modified, supplemented and replaced
from time to time, including that certain Amendment No. 4 to Amended and
Restated Loan and Security Agreement dated the date hereof, the "Loan
Agreement"), and evidences Revolving Loans made by the Lender thereunder.
Capitalized terms used in this Revolving Note which are not otherwise defined
herein have the respective meanings assigned to them in the Loan Agreement.

     The Lender is hereby authorized by the Borrowers to maintain records of the
amount of each Revolving Loan made by the Lender in accordance with the Loan
Agreement, the date such Revolving Loan is made, and the amount of each payment
or prepayment of principal, interest, or other charges made in respect of such
Revolving Loan received by the Lender. The Borrowers agree that, absent manifest
error, the amounts so evidenced in such records shall constitute conclusive
evidence of the amount owed hereunder.

     Upon the occurrence and continuation of an Event of Default, the principal
hereof and accrued interest hereon may be declared to be, or may become,
forthwith due and payable in the manner, upon the conditions and with the effect
provided in the Loan Agreement.

     The Borrowers and every guarantor and endorser hereof hereby waive
presentment, demand, notice of dishonor, protest and all other demands and


                                        5
<PAGE>



notices (other than as required by Section 8 of the Loan Agreement) in
connection with the delivery, acceptance, performance and enforcement of this
Revolving Note.

     This Revolving Note is given in substitution for, and not in novation of,
that certain Promissory Note given by QuesTech, QTSC and QTPI to the Lender in
the principal amount of Six Million Five Hundred Thousand and no/100 Dollars
($6,500,000.00) dated April 5, 1998.

     IN WITNESS WHEREOF, the Borrowers have caused their corporate names to be
signed by their duly authorized officers under seal as of the date and year
first above written.

                              QUESTECH, INC. a Virginia corporation



ATTEST:                       By:   V. L Salvatori
                                   -------------------------------
                                   Vincent L. Salvatori, Chairman

M. P. Rivera
- ----------------------
Secretary
[corporate seal]

                              QUESTECH SERVICE COMPANY, a Virginia
                              corporation



ATTEST:                       By:   V. L Salvatori
                                   --------------------------------
                                   Vincent L. Salvatori, Chairman

M. P. Rivera
- ----------------------
Secretary
[corporate seal]

                              QUESTECH PACKAGING, INC., a Virginia
                              corporation



ATTEST:                       By:   V. L Salvatori
                                   ------------------------------
                                   Vincent L. Salvatori, Chairman

M. P. Rivera
- ----------------------
Secretary
[corporate seal]



                                        6
<PAGE>





                              QT INFORMATION SCIENCES
                              CORPORATION, a Virginia corporation



ATTEST:                       By:   V. L Salvatori
                                   -------------------------------
                                   Vincent L. Salvatori, Chairman

M. P. Rivera
- -----------------------
Secretary
[corporate seal]



COMMONWEALTH OF VIRGINIA )
                         ) to-wit:
COUNTY OF FAIRFAX        )

     The foregoing instrument was subscribed sworn to, and acknowledged before
me, the undersigned notary, public on this 28 day of April, 1998, in the
jurisdiction aforesaid, by Vincent L. Salvatori, the Chairman of QuesTech, Inc.,
QuesTech Service Company, QuesTech Packaging, Inc. and QT Information Sciences
Corporation, in behalf of, and as the duly authorized act of, each
such corporation.



                                         M. D. Benford
                                  ---------------------------------
                                        Notary Public [SEAL]

My commission expires:   7/30/2000
                        --------------





                                        7

<PAGE>

                                                               EXHIBIT 10.10(d)

                     AMENDMENT NO. 4 TO AMENDED AND RESTATED
                         LOAN AND SECURITY AGREEMENT

     THIS AMENDMENT NO. 4 TO AMENDED AND RESTATED LOAN AND SECURITY AGREEMENT
(this "Amendment"), dated as of the 28 day of April, 1998, is made by and among
QUESTECH, INC., a Virginia corporation ("QuesTech"), QUESTECH SERVICE COMPANY, a
Virginia corporation formerly known as Engineering Resources, Inc. ("QTSC"),
QUESTECH PACKAGING, INC., a Virginia corporation ("QTPI"; QuesTech, QTSC and
QTPI are referred to individually as an "Original Borrower" and collectively as
the "Original Borrowers") and QT INFORMATION SCIENCES CORPORATION, a Virginia
corporation ("QTISC"; QuesTech, QTSC, QTPI and QTISC are referred to
individually as a "Borrower" and collectively as the "Borrowers"), and FIRST
UNION NATIONAL BANK, a national banking association, successor by merger to
Signet Bank, a Virginia banking corporation (the "Lender").

                                  RECITALS

A. The Lender and the Original Borrowers entered into an Amended and Restated
Loan and Security Agreement dated as of June 3, 1996 (as amended through the
date hereof, the "Agreement") pursuant to which the Lender has agreed to extend
credit to the Original Borrowers, and the Original Borrowers have agreed to
obtain credit from the Lender, on the terms and conditions set forth in such
Agreement.

B. The Borrowers have requested that the Lender make certain modifications to
the Agreement, including, permitting QTISC to become a Borrower, extending the
Termination Date, increasing the Maximum Amount, permitting a higher advance
rate with respect to certain government receivables included in the borrowing
base, decreasing the unused fee charged with respect to the credit and
increasing the tangible net worth requirement for the Borrowers, and the Lender
has consented to such request subject to the execution of this Amendment and the
satisfaction of the conditions specified herein.

C. The Borrowers and the Lender now desire to execute this Amendment to set
forth their agreements with respect to the modifications to the Agreement.

     Accordingly, for good and valuable consideration, the receipt and
sufficiency of which are hereby acknowledged, the Lender and the Borrowers agree
as follows:

SECTION 1. Definitions. Capitalized terms used in this Amendment and not
defined herein are defined in the Agreement.

SECTION 2. Amendments to Agreement. The Agreement is hereby amended as
follows:

          2.1 Amendments to Section 1. Section 1 of the Agreement is amended as
follows:

          2.1 (a) Borrowing Base. The definition of the term Borrowing Base is
restated in its entirety with the following definition:


                                        1
<PAGE>


          "Borrowing Base" means, at the time in question, the sum of (a) 90% of
Eligible Billed Government Receivables, (b) 80% of Eligible Billed Commercial
Receivables, and (c) 85% of Eligible Billed Special Commercial Receivables, all
as depicted in the Borrowing Base Certificate the Lender has most recently
received pursuant to Section 2.1(e) or Section 5.8(g) provided, however, that
(i) the Borrowing Base shall be reduced by the Letter of Credit Exposure on the
date the Borrowing Base is being calculated, (ii) at all times the Borrowing
Base shall remain subject to verification by the Lender, and (iii) in no event
shall the Borrowing Base attributable to the Accounts Receivable described in
clause (b) of this definition of "Borrowing Base" exceed One Million and no/100
Dollars ($1,000,000.00).

          2.1(b) Cash Collateral Account. The following sentence is added at
the end of the definition of Cash Collateral Account:

          The initial Cash Collateral Account for QTISC is account number
2065202369252.

          2.1(c) Commitment Fee. The definition of the term Commitment Fee is
restated in its entirety as follows:

          "Commitment Fee" means the quarterly fee to be paid by the Borrowers
to the Lender pursuant to Section 2.5 hereof in consideration of the commitment
by the Lender to make Revolving Loans hereunder. The Commitment Fee due for each
calendar quarter (or portion thereof) shall equal the product of the Commitment
FeeRate in effect for such quarter (or portion thereof) multiplied by the
difference between $8,000,000.00 and the sum of the average daily principal
balance of the Revolving Loans during such quarter (or applicable portion
thereof) plus the average daily face amount of all Letters of Credit outstanding
during such quarter (or applicable portion thereof).

          2.1(d) Commitment Fee Rate. The definition of the term Commitment
Fee  Rate is restated in its entirety as follows:

          "Commitment Fee Rate" means the rate calculated by multiplying
one-quarter percent (1/4%) by a fraction, the numerator of which is the number
of days in the calendar quarter, or shorter period for which the Commitment Fee
Rate is being calculated, and the denominator of which is 360.

          2.1(e) Maximum Amount. The definition of the term Maximum Amount is
restated in its entirety as follows:

          "Maximum Amount" means, at any time, the lesser of (a) the difference
between Eight Million and no/100 Dollars ($8,000,000.00) and the Letter of
Credit Exposure at such time or (b) the then-applicable Borrowing Base.

          2.1(f) Revolving Note. The definition of the term Revolving Note is
restated in its entirety as follows:

          "Revolving Note" means the promissory note in form and substance
acceptable to the Lender in the original principal amount of $8,000,000.00 (as
it may be amended, modified, supplemented or replaced from time to time)


                                        2
<PAGE>



evidencing the obligation of the Borrowers to pay the principal amount of the
Revolving Loans together with interest on the Revolving Loans.

          2.1(g) Termination Date. The definition of Termination Date is
hereby restated in its entirety as follows:

          "Termination Date" means May 31, 1999 and any extension or extensions
thereof granted by the Lender in its sole discretion.

          2.2 Amendments to Section 2.

          2.2 (a) Amendment to Section 2.1 (c). Section 2.1(c) is restated in
its entirety as follows:

     (c) If the Principal Amount exceeds the Maximum Amount, the Borrowers shall
immediately prepay the Revolving Loans to the extent necessary to reduce such
excess. If after such prepayment the Letter of Credit Exposure exceeds the sum
of (a) 90% of Eligible Billed Government Receivables, (b) 80% of Eligible Billed
Commercial Receivables, and (c) 85% of Eligible Billed Special Commercial
Receivables, all as depicted in the Borrowing Base Certificate the Lender has
most recently received pursuant to Section 2.1(e) or Section 5.8(g), the
Borrowers shall immediately deliver to the Lender such additional collateral as
the Lender shall deem necessary to adequately secure the Borrowers' obligations
with respect to such Letter of Credit Exposure.

          2.3 Amendments to Section 5. Section 5 of the Agreement is amended as
follows:

          2.3(a) Amendment to Section 5.12(a). Section 5.12(a) is deleted in its
entirety and restated as follows:

               (a) Minimum Tangible Net Worth. As of the ending date of the
financial period depicted in each consolidated balance sheet of QuesTech
required to be delivered to the Lender under the terms of this agreement (as
part of Form 10-Q or 10-K, as applicable), maintain a Tangible Net Worth of at
least (i) Three Million Dollars ($3,000,000.00) for each period ending prior to
June 30, 1998 and (ii) Three Million Seven Hundred Fifty Thousand and no/100
Dollars ($3,750,000.00) for each period ending on or after June 30, 1998.

SECTION 3. Representations and Warranties of the Borrowers. Each Borrower,
jointly and severally, represents and warrants to the Lender that:

               (a) Each Borrower has the power and authority to enter into and
to perform this Amendment, to execute and deliver all documents relating to this
Amendment, and to incur the obligations provided for in this Amendment, all of
which have been duly authorized and approved in accordance with each Borrower's
corporate documents;

               (b) This Amendment, together with all documents executed pursuant
hereto, shall constitute when executed the valid and legally binding obligations
of the Borrowers in accordance with their respective terms;


                                        3
<PAGE>



               (c) Except with respect to events or circumstances occurring
subsequent to the date thereof and known to the Lender, all representations and
warranties made in the Agreement are true and correct as of the date hereof,
with the same force and effect as if all representations and warranties were
fully set forth herein;

               (d) Each Borrower's obligations under the Loan Documents remain
valid and enforceable obligations, and the execution and delivery of this
Amendment and the other documents executed in connection herewith shall not be
construed as a novation of the Agreement or any of the other Loan Documents; and

               (e) As of the date hereof, no Borrower has any offsets or
defenses against the payment of any of the Obligations.

SECTION 4. Waiver of Claims. As a specific inducement to the Lender without
which the Borrowers acknowledge the Lender would not enter into this Amendment
and the other documents executed in connection herewith, each Borrower hereby
waives any and all claims that it may have against the Lender, as of the date
hereof, arising out of or relating to the Agreement or any other Loan Document
whether sounding in contract, tort or any other basis.

SECTION 5. Conditions of Effectiveness. This Amendment shall become effective
when, and only when, the Borrowers have executed and completed this Amendment
and a Revolving Note in form and substance acceptable to the Lender, have
delivered such original, executed documents to the Lender, and have reimbursed
the Lender for the Lender's costs and expenses incurred in connection with this
Amendment.

SECTION 6. Miscellaneous.

          6.1 Reference To Agreement, Revolving Note and Borrower or Borrowers.
Upon the effectiveness of this Amendment, each reference in the Agreement to
"this Agreement" and each reference in the other Loan Documents to the
Agreement, shall mean and be a reference to the Agreement as amended hereby,
each reference in the Agreement and the other Loan Documents to the "Revolving
Note" shall mean and be a reference to the Revolving Note executed by the
Borrowers and delivered to the Lender pursuant to Section 5 hereof, and each
reference to "Borrower" or "Borrowers" shall mean and be a reference to such
terms as defined in the preface of this Amendment.

          6.2 Effect on Loan Documents and Accrued and Unpaid Interest, Fees and
Other Charges. Except as specifically amended above, the Agreement and all other
Loan Documents shall remain in full force and effect and are hereby ratified and
confirmed. Without limiting the generality of the foregoing, all Collateral
given to secure the Obligations of the Borrowers under the Agreement and the
other Loan Documents prior to the date hereof does and shall continue to secure
all Obligations of the Borrowers under the Agreement, as amended hereby and the
other Loan Documents, and, except as provided in the Agreement and the other
Loan Documents, no such Collateral shall be released until all conditions to
such release as contained in the Loan Documents are satisfied. Any interest,
fees and other charges due under the Agreement which have accrued and remain
unpaid as of the effective date of this Amendment 


                                        4
<PAGE>



shall be paid on the next succeeding date that any such charge which has accrued
on or after the effective date of this Amendment is due under the Agreement, as
amended hereby, unless any such charge is discontinued by this Amendment, in
which event the Borrowers shall pay the accrued and unpaid portion thereof upon
execution of this Amendment.

          6.3 No Waiver. The execution, delivery and effectiveness of this
Amendment shall not operate as a waiver of any right, power or remedy of the
Lender under any of the Loan Documents, nor constitute a waiver of any provision
of any of the Loan Documents.

          6.4 Costs, Expenses and Taxes. The Borrowers, jointly and severally,
agree to pay on demand all costs and expenses of the Lender in connection with
the preparation, reproduction, execution and delivery of this Amendment and the
other instruments and documents to be delivered hereunder, including the
reasonable fees and out-of-pocket expenses of counsel for the Lender with
respect thereto.

          6.5 Governing Law. This Amendment shall be governed by and construed
in accordance with the laws of the Commonwealth of Virginia, without giving
effect to conflict of law provisions.

          6.6 Assumption of Obligations. As evidenced by its signature below,
QTISC hereby assumes all Obligations of the Original Borrowers under the
Agreement, as modified hereby.



     IN WITNESS WHEREOF, the Borrowers and the Lender have caused this Amendment
to be signed by their duly authorized representatives under seal all as of the
day and year first above written.

                              QUESTECH, INC. a Virginia corporation


ATTEST:                       By:  V. L. Salvatori
                                   ---------------------------------
                                   Vincent L. Salvatori, Chairman

M. P. Rivera
- ----------------------
Secretary
[corporate seal]


                              QUESTECH SERVICE COMPANY, a Virginia
                              corporation


ATTEST:                       By:  V. L. Salvatori
                                   ---------------------------------
                                   Vincent L. Salvatori, Chairman

M. P. Rivera
- ----------------------
Secretary
[corporate seal]



                                        5
<PAGE>


                              QUESTECH PACKAGING, INC., a Virginia
                              corporation




ATTEST:                       By:  V. L. Salvatori
                                   ----------------------------------
                                   Vincent L. Salvatori, Chairman

M. P. Rivera
- ---------------------
Secretary
[corporate seal]


                              QT INFORMATION SCIENCES
                              CORPORATIONS a Virginia corporation



ATTEST:                       By:  V. L. Salvatori
                                   ----------------------------------
                                   Vincent L. Salvatori, Chairman

M. P. Rivera
- ---------------------
Secretary
[corporate seal]


                              FIRST UNION NATIONAL BANK, a national banking
                              association, successor by merger to Signet Bank, a
                              Virginia banking corporation


                              By:  Loriana Cipolletti
                                   -----------------------------------
                                   Loriana Cipolletti, Vice President


                                        6

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<PAGE>
<ARTICLE> 5
       
<S>                             <C>
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                          DEC-31-1998
<PERIOD-END>                               MAR-31-1998
<CASH>                                         111,600
<SECURITIES>                                         0
<RECEIVABLES>                               15,047,000
<ALLOWANCES>                                 1,479,900
<INVENTORY>                                    116,500
<CURRENT-ASSETS>                            15,013,300
<PP&E>                                      11,893,200
<DEPRECIATION>                               6,539,800
<TOTAL-ASSETS>                              25,245,500
<CURRENT-LIABILITIES>                       12,937,600
<BONDS>                                              0
                                0
                                          0
<COMMON>                                        96,300
<OTHER-SE>                                   6,757,700
<TOTAL-LIABILITY-AND-EQUITY>                25,245,500
<SALES>                                              0
<TOTAL-REVENUES>                            19,164,900
<CGS>                                                0
<TOTAL-COSTS>                               18,685,400
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                             226,000
<INCOME-PRETAX>                                253,500
<INCOME-TAX>                                   107,500
<INCOME-CONTINUING>                            146,000
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                   146,000
<EPS-PRIMARY>                                     0.10
<EPS-DILUTED>                                     0.10
        

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