STRATEGIC DIAGNOSTICS INC/DE/
DEF 14A, 1999-03-30
MISCELLANEOUS CHEMICAL PRODUCTS
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                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                  SCHEDULE 14A
                                 (Rule 14a-101)

                    INFORMATION REQUIRED IN PROXY STATEMENT

                            SCHEDULE 14A INFORMATION
                Proxy Statement Pursuant to Section 14(a) of the
               Securities Exchange Act of 1934 (Amendment No.   )

Filed by the Registrant [_]
Filed by a Party other than the Registrant [_]

Check the appropriate box:

[_]  Preliminary Proxy Statement             [_]  Confidential, For Use of the
[X]  Definitive Proxy Statement                   Commission Only (as permitted
[_]  Definitive Additional Materials              by Rule 14a-6(e)(2))
[_]  Soliciting Material Pursuant to
     Rule 14a-11(c) or Rule 14a-12


                           STRATEGIC DIAGNOSTICS INC.
- --------------------------------------------------------------------------------
                (Name of Registrant as Specified In Its Charter)



- --------------------------------------------------------------------------------
    (Name of Person(s) Filing Proxy Statement, if Other Than the Registrant)


Payment of Filing Fee (Check the appropriate box):

[_]  No fee required.
[_]  Fee computed on table below per Exchange Act Rules 14a-6(i)(1) and 0-11.


________________________________________________________________________________
1)   Title of each class of securities to which transaction applies:



________________________________________________________________________________
2)   Aggregate number of securities to which transaction applies:



________________________________________________________________________________
3)   Per unit price or other underlying value of transaction  computed  pursuant
     to Exchange  Act Rule 0-11 (set forth the amount on which the filing fee is
     calculated and state how it was determined):



________________________________________________________________________________
4)   Proposed maximum aggregate value of transaction:



________________________________________________________________________________
5)   Total fee paid:

     [_]  Fee paid previously with preliminary materials:



________________________________________________________________________________
     [_]  Check box if any part of the fee is offset as provided by Exchange Act
          Rule  0-11(a)(2)  and identify the filing for which the offsetting fee
          was paid  previously.  Identify  the previous  filing by  registration
          statement number, or the form or schedule and the date of its filing.

          1)   Amount previously paid:

          2)   Form, Schedule or Registration Statement No.:

          3)   Filing Party:

          4)   Date Filed:


(SC14A-07/98)

<PAGE>


                           STRATEGIC DIAGNOSTICS INC.
                               111 Pencader Drive
                             Newark, Delaware 19702

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

                    NOTICE OF ANNUAL MEETING OF STOCKHOLDERS
                      TO BE HELD ON TUESDAY, APRIL 27, 1999

     NOTICE IS  HEREBY  GIVEN  that the  Annual  Meeting  of  Stockholders  (the
"Meeting") of Strategic  Diagnostics  Inc. (the  "Company")  will be held at the
Christiana Hilton, 100 Continental  Drive,  Newark,  Delaware 19713, on Tuesday,
April 27, 1999 at 10:00 a.m. for the following purposes:

     1. To elect four Class I  directors  of the Company to serve for a two-year
term until the 2001 Annual Meeting of  Stockholders  and until their  respective
successors are duly elected and qualified; and

     2. To approve  amendments to the Company's 1995 Stock Incentive Plan (to be
renamed the Strategic  Diagnostics  Inc. 2000 Stock  Incentive Plan) to increase
the number of shares  authorized  for issuance  from  1,700,000 to 2,500,000 (an
increase of 500,000 shares after the  cancellation  of the 1993 Stock  Incentive
Plan).

     3. To approve the Company's Employee Stock Purchase Plan;

     4. To consider and act upon any other matters which may properly be brought
before the Meeting and at any adjournments or postponements thereof.

     Any action may be taken on the foregoing matters at the Meeting on the date
specified  above,  or on any  date or  dates  to  which,  by  original  or later
adjournment,  the  Meeting  may be  adjourned,  or to which the  Meeting  may be
postponed.

     The Board of Directors has fixed the close of business on March 12, 1999 as
the record date for  determining the  stockholders  entitled to notice of and to
vote at the Meeting  and at any  adjournments  or  postponements  thereof.  Only
stockholders  of record of the  Company's  Common  Stock and Series A  Preferred
Stock at the close of business on that date will be entitled to notice of and to
vote at the Meeting and at any adjournments or postponements thereof.

     You are  requested to fill in and sign the enclosed  form of proxy which is
being  solicited  by the  Board  of  Directors  and to mail it  promptly  in the
enclosed  postage-prepaid  envelope.  Any proxy may be revoked by  delivery of a
later  dated  proxy.  Stockholders  of record who attend the Meeting may vote in
person, even if they have previously delivered a signed proxy.


                                    BY ORDER OF THE BOARD OF DIRECTORS,


                                    Martha C. Reider
                                    Secretary

Newark, Delaware
March 30, 1999

WHETHER OR NOT YOU PLAN TO ATTEND THE MEETING,  PLEASE COMPLETE,  SIGN, DATE AND
PROMPTLY  RETURN  THE  ENCLOSED  PROXY  CARD  IN  THE  POSTAGE-PREPAID  ENVELOPE
PROVIDED. IF YOU ATTEND THE MEETING, YOU MAY VOTE IN PERSON IF YOU WISH, EVEN IF
YOU HAVE PREVIOUSLY RETURNED YOUR PROXY CARD.

<PAGE>


                           STRATEGIC DIAGNOSTICS INC.


                               111 Pencader Drive
                             Newark, Delaware 19702

                                   ----------
                                 PROXY STATEMENT
                                   ----------

     This Proxy  Statement is furnished in connection  with the  solicitation of
proxies by the Board of Directors  (the "Board") of Strategic  Diagnostics  Inc.
(the  "Company") for use at the Annual Meeting of Stockholders of the Company to
be held on Tuesday,  April 27, 1999, and at any  adjournments  or  postponements
thereof (the "Meeting"). At the Meeting, stockholders will be asked to vote upon
(i) the  election of four Class I directors  of the Company (ii) the approval of
amendments  to the  Company's  1995  Stock  Incentive  Plan (to be  renamed  the
Strategic  Diagnostics Inc. 2000 Stock Incentive Plan) (iii) the approval of the
Company's  Employee  Stock  Purchase  Plan and (iv) any other  matters  properly
brought before them.

     This Proxy  Statement  and the  accompanying  Notice of Annual  Meeting and
Proxy Card are first being sent to  stockholders on or about March 30, 1999. The
Board has fixed the close of  business  on March 12, 1999 as the record date for
the  determination  of  stockholders  entitled  to  notice of and to vote at the
Meeting (the "Record Date"). Only stockholders of record of the Company's Common
Stock and Series A Preferred Stock  (collectively,  the "Stock") at the close of
business  on the Record  Date will be  entitled  to notice of and to vote at the
Meeting. As of the Record Date, there were 13,262,157 shares of Common Stock and
2,164,362 shares of Series A Preferred Stock outstanding and entitled to vote at
the Meeting. Holders of the Stock outstanding as of the close of business on the
Record Date will be entitled to one vote for each share held by them.

     The presence,  in person or by proxy,  of holders of at least a majority of
the  total  number  of  outstanding  shares  of the  Stock  entitled  to vote is
necessary to constitute a quorum for the transaction of business at the Meeting.
Abstentions  and  broker  non-votes  are each  included  in the number of shares
present at the Meeting for purposes of  establishing a quorum.  The  affirmative
vote of the  holders  of a  plurality  of the  shares  of the Stock  present  or
represented at the Meeting is required for the election of Class I directors and
thus,  abstentions  and broker  non-votes  have no effect on the  outcome of the
election of directors.  All other proposals  require the affirmative vote of the
majority of shares  present in person or represented by proxy at the meeting and
entitled to vote thereon.

     STOCKHOLDERS  OF THE COMPANY ARE  REQUESTED  TO  COMPLETE,  SIGN,  DATE AND
PROMPTLY  RETURN THE  ACCOMPANYING  PROXY CARD IN THE  ENCLOSED  POSTAGE-PREPAID
ENVELOPE.  SHARES REPRESENTED BY A PROPERLY EXECUTED PROXY RECEIVED PRIOR TO THE
VOTE AT THE MEETING AND NOT REVOKED  WILL BE VOTED AT THE MEETING AS DIRECTED ON
THE PROXY.  IF A PROPERLY  EXECUTED PROXY IS SUBMITTED AND NO  INSTRUCTIONS  ARE
GIVEN, THE PROXY WILL BE VOTED FOR THE ELECTION OF THE FOUR NOMINEES FOR CLASS I
DIRECTORS OF THE COMPANY NAMED IN THIS PROXY STATEMENT,  FOR THE APPROVAL OF THE
AMENDMENTS TO THE 1995 STOCK INCENTIVE PLAN AND FOR THE APPROVAL OF THE EMPLOYEE
STOCK PURCHASE PLAN. IT IS NOT ANTICIPATED THAT ANY MATTERS OTHER THAN THOSE SET
FORTH IN THIS PROXY STATEMENT WILL BE PRESENTED AT THE MEETING. IF OTHER MATTERS
ARE  PRESENTED,  PROXIES WILL BE VOTED IN ACCORDANCE  WITH THE DISCRETION OF THE
PROXY HOLDERS.

     A  stockholder  of record as of the  Record  Date may revoke a proxy at any
time  before  it has been  exercised  by filing a  written  revocation  with the
Secretary  of the  Company at the address of the  Company  set forth  above;  by
filing a duly executed proxy bearing a later date; or by appearing in person and
voting by ballot at the Meeting. Any stockholder of record as of the Record Date
attending  the  Meeting  may  vote in  person  whether  or not a proxy  has been
previously  given, but the presence (without further action) of a stockholder at
the Meeting will not constitute revocation of a previously given proxy.




<PAGE>



            STOCK OWNERSHIP OF PRINCIPAL STOCKHOLDERS AND MANAGEMENT

     The following table presents,  as of March 12, 1999,  information as to (i)
the persons or entities  known to the  Company to be  beneficial  owners of more
than 5% of the Company's Common Stock and the Series A Preferred Stock,  each as
a class, on March 12, 1999, (ii) each director, (iii) each of the named officers
appearing  in the  Summary  Compensation  Table under  "Executive  Compensation"
below,  and (iv) all directors and officers of the Company as a group,  based on
representations of officers and directors of the Company and filings received by
the Company on Schedule 13D and Schedule 13G under the  Securities  Exchange Act
of 1934,  as amended  (the  "Exchange  Act").  As of such date,  the Company had
13,262,157 shares of Common Stock issued and outstanding and 2,164,362 shares of
Series A Preferred  Stock issued and  outstanding.  Shares of Series A Preferred
Stock are convertible into an equal number of shares of Common Stock. The number
of shares and the percentage beneficially owned by the persons or entities named
in the  table and by all  officers  and  directors  as a group is  presented  in
accordance  with Rule 13d-3 of the  Exchange  Act and  includes,  in addition to
shares  issued and  outstanding,  unissued  shares which are subject to issuance
upon  exercise  of options or  warrants  within 60 days of March 12,  1999.  The
address of the  individual  beneficial  owners is in care of the  Company at its
address listed on the first page of this Proxy Statement.

<TABLE>
<CAPTION>
                                                        No. of Shares                        Percent of
                                                    Beneficially Owned(1)                       Class
                                                 --------------------------            ----------------------
                                                                  Series A                           Series A
Name and Address of Beneficial Owner              Common          Preferred            Common       Preferred
- ------------------------------------             --------         ---------            -------      ---------
<S>                                             <C>             <C>                    <C>            <C>
Palo Alto Investors, Inc.
  431 Florence Street, Suite 200
  Palo Alto, California 94302 ..............    2,535,500(2)            --              19.2%            --
The Perkin-Elmer Corporation
  761 Main Avenue
  Norwalk, Connecticut 06859 ...............    1,308,724(3)            --               9.9%            --
DSV Partners IV
  221 Nassau Street
  Princeton, New Jersey 08542(4) ...........      182,157(5)     1,082,181               1.4%          50.0%
Edison Venture Fund II, L.P.
  1009 Lenox Drive #4
  Lawrenceville, New Jersey 08648(4) .......      156,500(6)       907,636               1.2%          41.9%
Edison Venture Fund II-PA, L.P.
  1009 Lenox Drive #4
  Lawrenceville, New Jersey 08648(4) .......       30,095(7)       174,545                 *            8.1%
Grover C. Wrenn ............................      479,000(8)            --               3.6%            --
Richard C. Birkmeyer .......................    1,996,906(9)            --              14.9%            --
Richard J. Defieux .........................      211,595(10)    1,082,181               1.6%          50.0%
Robert E. Finnigan .........................       66,600(11)           --                 *             --
Stephen O. Jaeger ..........................    1,334,924(12)           --              10.1%            --
Kathleen E. Lamb ...........................      581,931(13)           --               4.4%            --
Curtis Lee Smith ...........................       51,000(14)           --                 *             --
Arthur A. Koch, Jr. ........................       75,000(14)           --                 *             --
Martha C. Reider ...........................      556,470(15)           --               4.2%            --
James W. Stave .............................      119,907(14)           --                 *             --
Kelly J. Cullum ............................       50,000(14)           --                 *             --
All Officers and Directors
as a group (11 persons) ....................    5,523,333(16)    1,082,181              39.0%          50.0%

</TABLE>
- ----------

*    Represents less than 1%.

(1)  Unless  otherwise  indicated,  each of the stockholders has sole voting and
     investment  power with respect to the securities  shown to be owned by such
     stockholder.  The  inclusion  herein of securities  listed as  beneficially
     owned does not constitute an admission of beneficial ownership.

(2)  Ownership of these shares was reported to the Company on Schedule 13G dated
     February 4, 1999.

(3)  Ownership of these shares was reported to the Company on Schedule 13D dated
     January 9, 1997.



                                       2
<PAGE>

(4)  Ownership of these shares was reported to the Company on Schedule 13D dated
     January 9, 1997.

(5)  Includes 156,358 shares underlying exercisable warrants.

(6)  Includes 131,140 shares underlying exercisable warrants.

(7)  Includes 25,218 shares underlying exercisable warrants.

(8)  Includes 225,000 shares of Common Stock underlying exercisable options.

(9)  Includes 125,661 shares underlying exercisable options.

(10) Shares of Common Stock represent  shares owned and 181,358 shares of Common
     Stock underlying  exercisable warrants and options. Of such amount,  25,000
     shares of Common Stock  underlie  exercisable  options owned by Mr. Defieux
     individually. Mr. Defieux is a General Partner of Edison Partners II, L.P.,
     the General Partner of Edison Venture Fund II, L.P. and Edison Venture Fund
     II-PA,  L.P. Mr. Defieux shares voting and investment powers with the other
     general  partners of Edison  Partners  II, L.P.  with respect to the shares
     owned by such funds. Mr. Defieux disclaims  beneficial  ownership of shares
     held by such  funds  except as to his  proportionate  partnership  interest
     therein.

(11) Includes  61,000  shares  subject to  exercisable  options and 5,600 shares
     owned jointly with Dr. Finnigan's wife.

(12) Includes   1,308,724   shares   held   by  The   Perkin-Elmer   Corporation
     ("Perkin-Elmer")  and 25,000 shares  subject to  exercisable  options.  Mr.
     Jaeger, the Perkin-Elmer  designee to the Company's Board of Directors,  is
     the Executive Vice President and Chief Operating Officer of Pharmacom Group
     Inc.  and has  agreed to advise  Perkin-Elmer  on  matters  concerning  the
     Company,  including  matters  requiring  a vote of the shares.  Mr.  Jaeger
     disclaims beneficial ownership of the shares owned by Perkin-Elmer.

(13) Ms. Lamb is the Vice  President of Finance of EM Science,  Inc., a division
     of EM  Industries,  Inc.  As  such,  she is  deemed  to  share  voting  and
     dispositive  control,  and  therefore to have  beneficial  ownership of the
     Company's  Common  Stock  held  by  EM  Industries,   Inc.  Ms.  Lamb  owns
     exercisable  options to purchase  25,000 shares of Common  Stock.  Ms. Lamb
     disclaims beneficial ownership of the shares held by EM Industries, Inc.

(14) Consists of shares underlying exercisable options.

(15) Includes 45,362 shares underlying exercisable options.

(16) Includes 827,930 shares subject to exercisable options,  5,600 shares owned
     jointly  by Dr.  Finnigan  and  his  wife  and  156,358  shares  underlying
     exercisable warrants.




                                       3
<PAGE>



                                   PROPOSAL 1
                        ELECTION OF A CLASS OF DIRECTORS

     The Company is the entity resulting from the merger (the "Merger") of EnSys
Environmental  Products,  Inc.  ("EnSys"),  and  Strategic  Diagnostics  Inc., a
privately held company ("SDI"),  which occurred on December 30, 1996 pursuant to
an Agreement and Plan of Merger  between such parties (the "Merger  Agreement").
EnSys was the  surviving  entity and changed its name to  Strategic  Diagnostics
Inc. Upon consummation of the Merger, Mr.Birkmeyer and the other officers of SDI
became officers of the Company and Mr. Wrenn became its Chairman.  The Company's
Fourth Amended and Restated  Certificate of Incorporation  (the  "Certificate of
Incorporation")  which was effective  concurrently  with the consummation of the
Merger on  December  30,  1996,  provides  that the Board will  consist of seven
members, three initially selected by EnSys (Messrs.  Wrenn, Finnigan and Smith),
three initially selected by SDI (Messrs. Birkmeyer and Defieux and Ms. Lamb) and
the remaining member (Mr. Jaeger) initially selected by Perkin-Elmer. The Merger
Agreement and the Company's  By-Laws require the Company to nominate the Class I
directors  identified  below for election at the  Meeting.  The Board is divided
into two classes of directors with each director  serving a two-year term.  Each
year only one class of directors is subject to a stockholder  vote. Four Class I
directors will be elected each to a two-year term at the Meeting. The members of
Class I are Grover C. Wrenn,  Richard C. Birkmeyer,  Kathleen E. Lamb and Curtis
Lee Smith,  Jr.; and of Class II are Richard J. Defieux,  Robert E. Finnigan and
Stephen  O.  Jaeger.  The Class II  members  of the Board are not  standing  for
election and their terms expire in 2000. Grover C. Wrenn,  Richard C. Birkmeyer,
Kathleen E. Lamb and Curtis Lee Smith Jr. are the Class I nominees  for election
to the Board at the Meeting.  Such  nominees if elected,  will hold office until
the  annual  meeting  in 2001 and until  their  successor  is duly  elected  and
qualified.  The  affirmative  votes of a  plurality  of the  shares of the Stock
present or  represented  at the Meeting and entitled to vote is required for the
election of the Class I  Directors.  Unless  otherwise  instructed,  the persons
named in the accompanying proxy will vote "FOR" the election of Grover C. Wrenn,
Richard  C.  Birkmeyer,  Kathleen  E. Lamb and  Curtis  Lee Smith Jr. as Class I
Directors. The following table sets forth the name, age and principal occupation
of each director, including the nominees, and the year in which he or she became
a director.
                                                                        Director
Name And Principal Occupation                                  Age        Since
- --------------------------------------------------------------------------------
Grover C. Wrenn (1) .....................................      56         1992
  Chairman of the Board SDI,                                 
  Chief Executive Officer Accent Health Inc.                 
Richard C. Birkmeyer (1) ................................      45         1996
  President and Chief Executive Officer of the Company       
Richard J. Defieux ......................................      47         1996
  General Partner of Edison Partners, L.P.                   
Robert E. Finnigan, Ph.D. ...............................      71         1991
  Consultant                                                 
Kathleen E. Lamb (1) ....................................      53         1996
  Vice President of Finance of EM Science, Inc.              
Curtis Lee Smith, Jr. (1) ...............................      71         1991
  Chief Executive Officer of New Horizons Worldwide, Inc.    
Stephen O. Jaeger .......................................      54         1996
  Executive Vice President and Chief Operating Officer    
  Pharmacom Group Inc.

- ----------

(1)  A nominee for election to the Board of Directors.




                                       4
<PAGE>



                             BACKGROUND OF DIRECTORS

     Grover C. Wrenn, age 56, has served as Chairman of the Board since December
1996.  Mr.  Wrenn  has  served  as  President  and Chief  Executive  Officer  of
AccentHealth  Inc., a privately held  communications  and marketing firm,  since
November 1996. Prior thereto,  Mr. Wrenn served as President and Chief Executive
Officer of EnSys from April 1995.  Prior to being  appointed  its  President and
CEO,  Mr.  Wrenn had served as a director of EnSys  since 1992.  From 1993 until
February  1995,  Mr. Wrenn served as President,  Chief  Executive  Officer and a
director of Applied  Bioscience  International,  Inc. Mr. Wrenn is a director of
Safety Kleen Corp., a publicly held provider of hazardous and  industrial  waste
management services to industry and government.  Mr. Wrenn is also a director of
Pharmakinetics   Laboratories,   Inc.,  a  publicly   held   contract   research
organization. Mr. Wrenn also serves as a Trustee of Eckerd College.

     Richard  C.  Birkmeyer,  age 45,  co-founded  SDI in 1990 and served as its
President and Chief  Executive  Officer and as a director  since  inception.  On
December 30, 1996,  Mr.  Birkmeyer  was  appointed a director of the Company and
became its President  and Chief  Executive  Officer.  Prior to founding SDI, Mr.
Birkmeyer was employed by E.I. duPont de Nemours from 1983 to 1990, where he had
most recently served as a product  manager.  Mr.  Birkmeyer  received a Ph.D. in
Biochemistry/Immunology  from the State University of New York at Binghamton and
his B.S. in Biology from the State  University  of New York at  Plattsburgh.  In
addition,  Mr.Birkmeyer  completed  post-doctoral  research in immunogenetics at
Iowa State University.

     Richard J. Defieux,  age 47, served as a director of SDI since 1993 and was
appointed as a director of the Company on December 30,  1996.  Mr.  Defieux is a
General Partner of Edison Partners, L.P., which is the general partner of Edison
Venture Fund,  L.P., a private venture capital fund. Since 1990, Mr. Defieux has
also been a general  partner of Edison  Partners II, L.P.,  which is the general
partner of Edison Venture Fund II, L.P.,  and Edison  Venture Fund II-PA,  L.P.,
and since 1994, a general  partner of Edison  Partners III,  L.P.,  which is the
general  partner of Edison  Venture Fund III,  L.P.  Prior to joining  Edison in
1987,  Mr.  Defieux  was a General  Partner of  Princeton/Montrose  Partners,  a
venture capital firm. Mr. Defieux  received his B.A. and M.A. degrees in Geology
from Boston University and his M.B.A. from Columbia University.

     Robert E.  Finnigan,  age 71, has served as a director of EnSys since 1991.
Dr.  Finnigan was a member of the  Scientific  Advisory  Board of EnSys and is a
consultant to several analytical  instrument  manufacturers.  From 1967 to 1990,
Dr.  Finnigan  served in various  executive  roles and as a director at Finnigan
Corporation,  an  analytical  instrument  manufacturer.  He  is  a  director  of
ThermoSpectra  Corporation,  a publicly  owned  subsidiary of Thermo  Instrument
Systems, Inc. and is an advisor to Hambrecht & Quist's Environmental  Technology
Fund.

     Kathleen  E. Lamb,  age 53,  served as a director of SDI since 1996 and was
appointed  as a director of the Company on December 30,  1996.  Since 1991,  Ms.
Lamb has been Vice  President of Finance of EM Science,  Inc. and, from May 1996
through 1997, served as General Manager of OEM Marketing for EM Science, Inc., a
division of EM Industries,  Inc. which is an affiliate of Merck KGaA, Darmstadt,
Germany.  Prior to joining EM Science,  Inc., Ms. Lamb was the Vice President of
Finance  for EM  Diagnostics  Systems.  She is also a  member  of the  Board  of
Directors of M.E.  Gordon & Associates and has taught  finance  courses at Rowan
College in New Jersey.  Ms. Lamb received her B.S. in Accounting  and M.B.A from
Drexel University.

     Curtis Lee Smith,  Jr.,  age 71,  has served as a director  of EnSys  since
1991. Mr. Smith served as Chairman of the Board and Chief  Executive  Officer of
Handex Corp., an environmental  consulting and remediation company, from 1986 to
1996.  He is now  Chairman  of the  Board  and Chief  Executive  Officer  of New
Horizons Worldwide, Inc., an owner and franchisor of computer training centers.

     Stephen O.  Jaeger,  age 54,  served as a director of SDI since August 1996
and was appointed as a director of the Company on December 30, 1996.  Mr. Jaeger
has been Executive Vice  President,  Chief  Operating  Officer and a Director of
Pharmacon  Group Inc.,  since February 1999.  From January through October 1998,
Mr.  Jaeger was the Executive  Vice  President  and Chief  Financial  Officer of
Clinical  Communications  Group Inc., a  privately-held  provider of  outsourced
educational marketing services to the pharmaceutical industry. Prior thereto Mr.
Jaeger had been Vice President and Chief Financial Officer of Perkin-Elmer since
1995, and since 1996 had also been its Treasurer.  From 1987 to 1995, Mr. Jaeger
was employed by Houghton  Mifflin and Company,  most recently as Executive  Vice
President,  Chief  Financial  Officer and Treasurer,  and served on its board of
directors.  Mr.  Jaeger is also  Chairman  of the Board and a  director  of Inso
Corporation.



                                       5
<PAGE>

Compensation of Directors

     Directors  are  entitled  to receive  compensation  for their  services  as
determined by a majority of the Board.  However,  directors  that are employees,
and who receive  compensation  for their  services as such,  are not entitled to
receive any compensation for their services as a director of the Company.  Board
members are entitled to reimbursement  for travel related  expenses  incurred in
attending  meetings  of  the  Board  and  its  committees.  Under  an  agreement
terminated  effective  June 1, 1998,  Mr.  Wrenn,  in his  capacity as Chairman,
received  compensation  of $33,333 and  participated  in the Company's  employee
benefit plans during 1998 until such date.

Meetings of the Board of Directors and Committees

     The board of directors  of the Company held six meetings  during the fiscal
year ended December 31, 1998. Each of the directors attended at least 75% of the
aggregate  of the total  number of  meetings  of the board of  directors  of the
Company and of the  committees  of which he or she was a member  which were held
during  the  period he or she was a  director  or  committee  member.  The Audit
Committee of the Company's  board of directors  held three meetings in 1998. The
members of the Audit  Committee  were Mr.  Jaeger,  Ms. Lamb and Mr. Smith.  The
Audit  Committee  reviews  the  selection  of outside  accountants,  reviews the
results and scope of the annual audit and the services provided by the Company's
independent auditors and the recommendations of the auditors with respect to the
accounting  systems and controls.  The  Compensation  Committee of the Company's
board of directors met once in 1998. The members of the  Compensation  Committee
were Mr. Wrenn, Mr. Defieux and Dr.Finnigan.  The Compensation Committee reviews
and  approves  salaries  for all  corporate  officers,  reviews and approves all
incentive and special  compensation plans and programs,  including stock options
and related longer term incentive  compensation  programs,  reviews and approves
management  succession planning,  conducts special competitive studies,  retains
compensation   consultants   as  necessary  and   appropriate,   and  recommends
appropriate  programs and action on any of the above  matters to the Board.  The
Board selects nominees for election as directors of the Company.  The Board will
consider a nominee for election to the Board  recommended  by a  stockholder  of
record if such  recommendation is timely, in accordance with, and accompanied by
the  information  required  by, the  Company's  By-Laws.  The  Company  does not
maintain a standing nominating committee.


             SECTION 16(a) BENEFICIAL OWNERSHIP REPORTING COMPLIANCE

     Section 16(a) of the Exchange Act requires the Company's executive officers
and  directors  to file initial  reports of  ownership  and reports of change of
ownership with the Securities and Exchange  Commission (the "SEC").  The Company
has a program to assist its officers and directors in complying  with the filing
requirements of Section 16(a).  Executive officers and directors are required by
SEC  regulations  to furnish the Company with copies of all Section  16(a) forms
they  file.  Based on a review of the  copies  of such  forms  furnished  to the
Company and other information gathered by the Company, the Company believes that
during the preceding  year the executive  officers and directors then subject to
Section 16(a) complied with all Section 16(a) filing requirements.


                                   PROPOSAL 2
                TO AMEND AND RENAME THE 1995 STOCK INCENTIVE PLAN

     The Board of Directors  believes that attracting,  motivating and retaining
key personnel of the Company is essential to the  Company's  growth and success.
The Board also believes that important advantages to the Company are gained by a
comprehensive  compensation  program that includes different types of incentives
for motivating key personnel of the Company and rewards for outstanding service.
Accordingly,  on March 24,  1999,  the Board  adopted,  subject  to  stockholder
approval,  the below-described  amendments to the Company's 1995 Stock Incentive
Plan. The  amendments  are designed to enhance the Company's  ability to closely
link  compensation  to performance  and to reward key personnel for  outstanding
service.

     The 1995 Stock  Incentive  Plan provides for the issuance of stock options,
stock awards and performance share awards. The Board has the authority to select
recipients of awards, who may be officers, employees, directors,  consultants or
advisors of the Company.  Presently the Company has  approximately 100 employees
(including officers) and seven directors. The 1995 Stock Incentive Plan provides
for the issuance of Incentive  Stock Options,  for which the exercise price must
be equal to the fair  market  value  of the  underlying  shares  on the date the
option is granted, and non-statutory (or "nonqualified") stock options.  Options
are subject to such


                                       6
<PAGE>

limitations  and conditions on exercise as the Board  determines,  including the
time and manner in which  options  are  exercisable.  In the case of a merger or
consolidation with another  corporation,  the Board may (but is not required to)
provide for the substitution of options in such other corporation's  shares as a
replacement  for  options  granted  under the 1995 Stock  Incentive  Plan.  As a
general  matter,   options  terminate  three  months  following  termination  of
employment or other  relationship  with the Company  (unless the Board  provides
otherwise) or on the  expiration  of the stated term of the option,  if earlier.
Options terminate at other times in the case of the optionee's death, disability
or termination for cause.

     The 1995 Stock  Incentive  Plan also  provides  for the  outright  grant of
shares to an eligible  individual at no cost to that  individual.  Shares may be
awarded subject to such conditions and limitations as the Board may determine or
may be issued  without  restriction.  The plan also provides for the issuance of
Performance  Share  Awards,  which entitle the  recipients to acquire  shares of
Company stock upon the attainment of specified  performance  goals.  Performance
Share Awards may be made  independent  of the granting of any other awards under
the plan. The Board sets performance  goals applicable to each award,  which may
vary among participants.

     The Company  proposes  and  recommends  the adoption of changes to the 1995
Stock Incentive Plan and  authorization of additional shares for award under the
revised  plan.  The 1995 Stock  Incentive  Plan would be renamed  the  Strategic
Diagnostics  Inc. 2000 Stock Incentive Plan. An additional  800,000 shares would
be authorized for issuance under the plan,  reflecting the ongoing nature of the
plan and the fact that only 85,772  shares of common stock remain  available for
award under the plan out of the  1,700,000  originally  reserved  for  issuance.
Subject to the receipt of  stockholder  approval of the  amendments  to the 1995
Stock  Incentive  Plan, the Company  intends to cancel its 1993 Stock  Incentive
Plan which will  liberate  300,000  shares  reserved  for  issuance  thereunder.
Accordingly,  the proposed  increase in the shares reserved under the 1995 Stock
Incentive Plan will result in a net increase in reserved shares of 500,000. Upon
shareholder  approval  of these  changes,  the plan will be  modified to reflect
these and any other changes made by the Board to the plan.

     Prior to the date of this proxy  statement,  option  grants  have been made
under the 1995 Stock  Incentive  Plan to the following  persons and groups (with
the  underlying  share  amounts  immediately  following  each  person or group):
Richard J.  Birkmeyer  (150,661);  Grover C. Wrenn  (250,000);  Kathleen E. Lamb
(45,000);  Curtis Lee Smith, Jr. (45,000);  all current executive  officers as a
group  (1,025,930);  all current  directors who are not executive  officers as a
group (225,000); all other employees as a group (243,060). As of March 23, 1999,
the market value of a share of common stock of the Company was $2.25.

     With respect to non-qualified  option awards under the 1995 Stock Incentive
Plan,  participants  will recognize no taxable income at the time of grant. Upon
exercise  of a  non-qualified  stock  option,  the  participant  will  recognize
ordinary  income  equal to the excess,  if any, of the fair market  value of the
shares on the date of exercise over the exercise  price.  The  participant  will
recognize as a capital  gain or loss any profit or loss  realized on the sale or
exchange  of any share  disposed  of or sold.  The  Company  will be entitled to
deduct an amount equal to the difference between the exercise price and the fair
market value of the shares on the date of exercise.

     With respect to incentive stock options,  generally,  the participant  will
recognize no taxable gain or loss when the incentive  stock option is granted or
exercised.  Upon exercise, the excess, if any, of the fair market value over the
exercise  price  will  be  an  item  of  tax  preference  for  purposes  of  the
participant's alternative minimum tax.

     If the shares  acquired upon the exercise of an incentive  stock option are
held for two years after the date of grant and one year from the date the shares
are transferred  following the exercise of the incentive stock option,  then the
participant  will  recognize any gain or loss realized upon a sale of the shares
as  long-term  capital  gain or loss.  The  Company  will not be  entitled  to a
deduction.  If the shares are not held for the holding periods,  the participant
will recognize  ordinary income in an amount equal to the difference between the
exercise  price and the fair market value of Common Stock on the date the option
is exercised,  or the amount of gain recognized on the sale if less. The Company
will be entitled to a deduction  equal to the amount of any  ordinary  income so
recognized.  If the shares are not held for the  holding  periods and the amount
realized  upon sale is less  than the grant  price,  such  difference  will be a
capital loss to the participant.

     The  Board  has the right to amend,  modify  or  terminate  the 1995  Stock
Incentive Plan at any time without notice,  provided that no participant's  then
existing rights are adversely affected without his or her consent,  and provided
further,  that upon any  amendment  of the plan,  stockholder  approval  will be
obtained if required by law.


                                       7
<PAGE>

The above  description is a partial  summary of material  provisions of the 1995
Stock Incentive Plan,  including  amendments to the plan adopted by the Board on
March 24, 1999.

     THE  BOARD OF  DIRECTORS  RECOMMENDS  A VOTE IN FAVOR OF THIS  PROPOSAL  TO
APPROVE THE  AMENDMENT  AND  RENAMING OF THE 1995 STOCK  INCENTIVE  PLAN.  If no
instructions are given on a properly  executed and returned proxy, the shares of
Common Stock  represented  thereby will be voted IN FAVOR OF the adoption of the
amendment and renaming of the 1995 Stock Incentive Plan.


                                   PROPOSAL 3
           TO APPROVE THE ADOPTION OF THE EMPLOYEE STOCK PURCHASE PLAN

     On November 3, 1998, the Board adopted,  subject to stockholder approval as
described herein,  the Company's  Employee Stock Purchase Plan (the "ESP Plan").
The ESP Plan is an employee  stock  purchase  plan under  Internal  Revenue Code
("IRC")  Section  423. The ESP Plan allows  employees to purchase the  Company's
Common Stock from the Company at a discount,  without being subject to tax until
they sell the stock,  and without having to pay any brokerage  commissions  with
respect to the  purchases.  The  effective  date of the ESP Plan was  January 1,
1999. The purpose of the ESP Plan is to encourage and facilitate the purchase of
Common Stock by employees  of the Company and any  subsidiaries  approved by the
Board  of  Directors  (collectively,  the  "Participating  Companies"),  thereby
providing  employees of the Company and Participating  Companies with a personal
stake in the Company and a long range  inducement to remain in the employ of the
Company and the  Participating  Companies.  The ESP Plan is  administered by the
Board of Directors or by a committee appointed by the Board of Directors.


Summary of the ESP Plan

     The ESP Plan provides employees with the right to purchase shares of Common
Stock through payroll  deduction.  A total of 661,157 shares of Common Stock are
available for purchase  under the ESP Plan,  subject to adjustment in the number
and price of shares of Common  Stock  available  for  purchase  in the event the
outstanding  shares of Common Stock are  increased or  decreased  through  stock
dividends,  recapitalizations,  reorganizations or similar changes. The ESP Plan
is to be administered by the Board,  which may delegate  responsibility for such
administration  to a committee  of the Board (the  "Committee").  Subject to the
terms of the ESP Plan,  the  Board or the  Committee  shall  have  authority  to
interpret the ESP Plan, to  prescribe,  amend and rescind rules and  regulations
relating  to it,  and to make  all  other  determinations  deemed  necessary  or
advisable in administering the ESP Plan.

     An  employee  of the  Company or a  Participating  Company is  eligible  to
participate  in the ESP Plan if the  employee,  as of the last day of the  month
immediately  preceding the effective  date of an election to purchase  shares of
Common  Stock  pursuant  to the ESP Plan:  (1) has been  employed on a full-time
basis  for at  least  six  consecutive  months;  or (2) has been  employed  on a
part-time basis for at least 24 consecutive months. An employee is considered to
be a part-time  employee if the  employee is scheduled to work at least 20 hours
per week. Approximately 100 employees, including the chief executive officer and
the other executive officers of the Company,  are eligible to participate in the
ESP Plan.

     Notwithstanding  the foregoing,  any employee who, after purchasing  Common
Stock under the ESP Plan,  would own five percent or more of the total  combined
voting  power or value of all  classes  of stock of the  Company  or any  parent
corporation or subsidiary  corporation  thereof is not eligible to  participate.
Ownership  of stock is  determined  in  accordance  with the  provisions  of IRC
Section  424(d).  Further,  an employee is not eligible to  participate  if such
participation  would permit such  employee's  rights to purchase stock under all
employee  stock  purchase plans of the  Participating  Companies  which meet the
requirements  of IRC Section 423(b) to accrue at a rate which exceeds $25,000 in
fair market value for each calendar year in which such option is outstanding.

     Eligible  employees  may  elect to  participate  in the ESP Plan  during an
Offering which starts on the first day of each calendar quarter  beginning on or
after adoption of the ESP Plan by the Board (the "Offering  Commencement  Date")
and ends on the last day of each  calendar  quarter (the  "Offering  Termination
Date"). Shares will be deemed to have been purchased on the Offering Termination
Date. The purchase price per share offered under the ESP Plan will be 90 percent
of the  lesser  of:  (1)  the  fair  market  value  per  share  on the  Offering
Commencement  Date,  or if such  date is not a  trading  day,  then on the  next
trading day thereafter; or (2) the fair


                                       8
<PAGE>

market value per share on the Offering Termination Date, or if such date is not
a trading day, then on the next trading day thereafter.

     If the total number of shares of Common Stock for which purchase rights are
exercised on any Offering  Termination Date exceeds the maximum number of shares
of  Common  Stock  available,  the  Board  or  Committee  shall  make a pro rata
allocation  of shares  available  for delivery and  distribution  in as nearly a
uniform  manner  as  practicable,  and as it  shall  determine  to be  fair  and
equitable,  and the unapplied account balances shall be returned to participants
as soon as practicable following the Offering Termination Date.

     A participant  may  discontinue  his  participation  in the ESP Plan at any
time. A participant  may change the amount of payroll  deductions for subsequent
Offerings by giving  written  notice of such change to the Board or Committee on
or  before  the  15th  day of  the  month  immediately  preceding  the  Offering
Commencement Date for the Offering for which such change is effective.

     A  participant   may  elect  to  withdraw  the  balance   credited  to  the
participant's  account  by  providing  a  termination  form to the  Board or the
Committee at any time before the Offering  Termination  Date  applicable  to any
Offering.  A participant may withdraw all, but not less than all, of the amounts
credited to the participant's account. A participant who elects to withdraw from
an Offering  shall be deemed to have elected not to  participate  in each of the
two succeeding  Offerings  following the date on which the  participant  gives a
termination form to the Committee.

     Generally,  upon  termination of a participant's  employment for any reason
other than death,  all amounts credited to such  participant's  account shall be
returned to the participant.  In the event of a participant's (1) termination of
employment due to death or (2) death after  termination of employment but before
the  participant's  account  has been  returned,  all  amounts  credited to such
participant's    account    shall    be    returned    to   the    participant's
successor-in-interest.

     All funds held or received  by the Company  under this ESP Plan may be used
for any  corporate  purpose  until  applied to the  purchase of shares of Common
Stock or  refunded to  employees  and shall not be  segregated  from the general
assets of the Company.  Shares of Common Stock purchased under the ESP Plan will
be issued from the Company's treasury stock or from the Company's authorized but
unissued  shares.  The  Participating  Companies shall pay all fees and expenses
incurred  (excluding  individual  Federal,  state,  local  or  other  taxes)  in
connection with the ESP Plan.

     The ESP Plan is not qualified under Section 401(a) of the Internal  Revenue
Code. The Company  generally will not be entitled to a deduction with respect to
stock  purchased  under the ESP Plan,  unless the stock is disposed of less than
one year after the Common Stock is purchased by the  employee,  or less than two
years after each Offering Commencement Date.

     Generally,  no tax consequences arise at the time the participant purchases
shares of Common Stock.  If a  participant  does not dispose of shares of Common
Stock  purchased  under  the ESP Plan for at least  one year  after  the date of
purchase and at least two years after the grant of the purchase  right,  he will
be deemed to have  received  compensation  taxable  as  ordinary  income for the
taxable year in which the disposition occurs in an amount equal to the lesser of
(a) the 10%  discount  originally  allowed,  or (b) the excess over the purchase
price of (i) the amount actually received for the shares if sold or exchanged or
(ii) the fair market value of the shares on the date of any other termination of
his  ownership  (such as by gift).  The amount of such  ordinary  income is then
added to the  participant's  basis in his shares  for  purposes  of  determining
capital gain or loss.

     If a participant disposes of shares of Common Stock purchased under the ESP
Plan less than one year after the date of purchase,  or more than one year after
the date of purchase but within two years after the grant of the purchase right,
he will be deemed to have received  compensation  taxable as ordinary  income in
the amount of the  difference  between  the  amount  paid for the shares and the
value  of the  shares  at the  time  of  purchase.  If the  shares  are  sold or
exchanged,  the  amount of such  ordinary  income is added to the  participant's
basis in his shares for  purposes  of  determining  capital  gain or loss.  If a
participant dies before disposing of the shares purchased under the ESP Plan, he
will be deemed to have realized  compensation  income taxable as ordinary income
in the taxable  year  closing with his death in an amount equal to the lesser of
clauses (a) and (b)(ii) as set forth in the immediately preceding paragraph.  He
is deemed not to have realized any capital gain or loss because of death.



                                       9
<PAGE>

     The  Board or the  Committee  shall  have the  right to  amend,  modify  or
terminate the ESP Plan at any time without  notice,  provided that no employee's
then existing  rights are  adversely  affected  without his or her consent,  and
provided further, that upon any amendment of the ESP Plan,  stockholder approval
will be obtained if required by law.

     The above  description is a partial  summary of material  provisions of the
Company's  ESP Plan.  This  summary is qualified in its entirety by reference to
the full text of the plan which  appears  as  Exhibit A  attached  to this proxy
statement.

     THE  BOARD OF  DIRECTORS  RECOMMENDS  A VOTE IN FAVOR OF THIS  PROPOSAL  TO
APPROVE THE  ADOPTION OF THE  COMPANY'S  EMPLOYEE  STOCK  PURCHASE  PLAN.  If no
instructions are given on a properly  executed and returned proxy, the shares of
Common Stock  represented  thereby will be voted IN FAVOR OF the adoption of the
ESP Plan.

























                                       10
<PAGE>



                             EXECUTIVE COMPENSATION

     Summary   Compensation  Table.  The  following  table  sets  forth  certain
compensation information for each of the last three fiscal years with respect to
(i) the Company's  Chief  Executive  Officer and (ii) each of the Company's four
other most  highly  compensated  officers  based on salary and bonus paid during
1998.


<TABLE>
<CAPTION>
                           SUMMARY COMPENSATION TABLE
                                                                                    Long-Term       All Other
                                                 Annual Compensation              Compensation    Compensation
                                           ------------------------------          ----------      ----------
                                                                                   Securities
                                                                                   Underlying
 Name and Principal Position             Year         Salary($)     Bonus($)       Options(#)       Amount($)
 ---------------------------             ----         ---------     --------       ----------      ----------
<S>                                      <C>           <C>           <C>             <C>           <C>  
Grover C. Wrenn (1)                      1998           33,333            --              --          1,000
Chairman                                 1997           80,000            --              --        216,790
                                         1996          157,500       117,688         100,000         14,834

Richard C. Birkmeyer (2)                 1998          174,333            --              --         10,150
President and CEO                        1997          164,000        64,500              --         10,150
                                         1996               --            --         100,000             --

Arthur A. Koch, Jr. (3)                  1998          158,886            --         100,000          7,820
Vice President and COO                   1997          124,100        43,500         100,000          2,250
                                         1996               --            --              --             --

Martha C. Reider (4)                     1998          107,601            --              --          8,636
Vice President, Quality                  1997          101,200        20,000          60,000          8,433
Assurance/Human Resources  1996            --               --            --              --             --

James W. Stave Ph.D.(5)                  1998          109,001            --              --          8,686
Vice President,                          1997           99,600        20,000          60,000          8,381
Research and Development                 1996               --            --              --             --

Kelly J. Cullum (6)                      1998          200,064        35,000         200,000             --
Vice President,                          1997               --            --              --             --
Sales & Marketing                        1996               --            --              --             --

</TABLE>

(1)  Effective  December 30, 1996,  Mr.  Wrenn  resigned as President  and Chief
     Executive  Officer  and was  appointed  Chairman.  All  Other  Compensation
     consists of $1,000 in Company  contributions to Mr. Wrenn's 401(k) account.
     Effective June 1, 1998,  Mr. Wrenn no longer  received a salary or benefits
     from the Company for serving as its Chairman.

(2)  Mr. Birkmeyer's  employment as President and Chief Executive Officer of the
     Company commenced on December 30, 1996. All other compensation  consists of
     $4,750 in Company  contributions  to Mr.  Birkmeyer's  401(k)  account  and
     $5,400 for an automobile allowance.

(3)  Mr. Koch's  employment  commenced  April 14, 1997.  All other  compensation
     consists of $2,420 in Company  contributions  to Mr. Koch's 401(k)  account
     and $5,400 for an automobile allowance.

(4)  Ms. Reider's  employment  with the Company  commenced on December 30, 1996.
     All other compensation  consists of $5,400 for an automobile  allowance and
     $3,236 in Company contributions to Ms. Reider's 401(k) account.

(5)  Dr. Stave's employment with the Company commenced on December 30, 1996. All
     other  compensation  consists  of $5,400 for an  automobile  allowance  and
     $3,286 in Company contributions to Dr. Stave's 401(k) account.

(6) Ms. Cullum's employment commenced on February 10, 1998.

     Option  Grants and  Exercises  in Fiscal Year 1998.  The  following  tables
summarize option grants and exercises during 1998 to or by the officers named in
the Summary Compensation Table. In accordance with SEC rules, also shown are the
hypothetical gains or "option spreads," on a pre-tax basis, that would exist for
the respective options. These gains are based on assumed rate of annual compound
stock appreciation of 5% and 10% from the date the options were granted over the
full option term.





                                       11
<PAGE>



<TABLE>
                        OPTION GRANTS IN FISCAL YEAR 1998

<CAPTION>
                                                                                     Potential Realizable Value
                                    Individual Grants Under the Company's            at Assumed Annual Rates of
                                 Amended and Restated 1995 Stock Option Plan          Stock Price Appreciation
                            -----------------------------------------------------    ---------------------------
                             Number of
                            Securities  Percent of Total
                            Underlying   Options Granted   Exercise                     5% for         10 for%
                              Options    to Employees in   Price per   Expiration     Option Term    Option Term
         Name                 Granted    Fiscal Year (%)     Share        Date            ($)            ($)
         ----               ----------  ---------------    --------    ----------     -----------    ----------
<S>                          <C>             <C>            <C>          <C>  <C>       <C>            <C>    
Arthur A. Koch, Jr.          100,000(1)      33.3%          $2.625       1/26/08        144,724        356,461
Kelly J. Cullum              200,000(1)      66.7%          $2.625       1/26/08        289,447        712,923
</TABLE>

(1)  Options were granted January 28, 1998 and will become exercisable at a rate
     of 25% on January 1, 1999 and 25% annually on each January 1 thereafter.




<TABLE>
                 AGGREGATED OPTION EXERCISES IN FISCAL YEAR 1998
                        AND FISCAL YEAR-END OPTION VALUES

<CAPTION>
                                                            Number of Unexercised       Value of Unexercised
                                                              Options at Fiscal         In-the-Money Options
                                  Shares                        Year-End (#)         at Fiscal Year-End ($) (1)
                                Acquired on     Value     -------------------------- ---------------------------
         Name                  Exercise (#) Realized ($)  Exercisable  Unexercisable Exercisable   Unexercisable
         ----                  ------------ ------------  -----------  ------------- -----------   -------------
<S>                                <C>         <C>          <C>          <C>          <C>            <C>
Grover C. Wrenn                     --          --          200,000       50,000            --           --
Richard C. Birkmeyer                --          --          100,661       50,000        91,696           --
Arthur A. Koch, Jr.                 --          --           25,000      175,000         3,125        9,375
Martha C. Reider                    --          --           30,362       45,000        29,680        5,625
James W. Stave                      --          --          104,907       45,000       164,607        5,625
Kelly J. Cullum                     --          --               --      200,000            --           --
</TABLE>

(1)  Value is calculated  based on the  difference  between the option  exercise
     price  and the  market  price of the  Common  Stock on  December  31,  1998
     ($2.00), multiplied by the number of shares to which the option relates.


Executive Employment Agreements

     The Company maintains an employment agreement dated as of December 30, 1996
with Mr.  Birkmeyer,  which  provides  for  compensation  at an  annual  rate of
$164,000 with annual increases of not less than 5% of the then current salary as
determined  by  the  Compensation  Committee.  Additionally,  Mr.  Birkmeyer  is
entitled to an annual bonus as determined by the  Compensation  Committee not to
exceed 75% of his then current salary. This agreement also granted Mr. Birkmeyer
an option to purchase 100,000 shares of the Company's Common Stock, which option
became  exercisable at a rate of 25% immediately and 25% annually  thereafter on
the  three  successive  option  grant  date  anniversaries.  Such  option  vests
immediately upon a change of control of the Company (as defined in Section 12 of
the Company's  Amended and Restated 1995 Stock Option Plan).  This agreement was
for an  initial  one-year  term and is  automatically  extended  for  subsequent
one-year  terms unless  otherwise  terminated  by Mr.  Birkmeyer or the Board by
giving not less than 60 days written  notice.  Mr.Birkmeyer  will be entitled to
receive salary and benefits then in effect for one year after termination of the
agreement by Mr.  Birkmeyer for good reason (as defined in the  agreement) or by
the Company without cause.


   Report of the Compensation Committee

     The Compensation  Committee of the Board of Directors is comprised of three
directors.  The Compensation Committee determines the compensation for the Chief
Executive Officer and reviews the recommendations of the Chief Executive Officer
and approves salaries for all other corporate officers, reviews and approves all
incentive and special  compensation plans and programs,  including stock options
and related longer term incentive  compensation  programs,  reviews and approves
management  succession planning,  conducts special competitive studies,  retains
compensation   consultants   as  necessary  and   appropriate,   and  recommends
appropriate programs and action on any of the above matters to the Board.




                                       12
<PAGE>

   Compensation Philosophy

     The Company approaches compensation for all its employees, including senior
management,  with a  consistent  philosophy.  This  philosophy  is  based on the
premise that the achievements of the Company result from the coordinated efforts
of all  individuals  working toward common  objectives.  The Company  strives to
achieve  those  objectives  through  teamwork  that is focused  on  meeting  the
expectations of customers and stockholders.

     The  goals  of the  compensation  program  are to align  compensation  with
business  objectives  and  performance,  and to enable the  Company to  attract,
retain and reward  executive  officers whose  contributions  are critical to the
long-term  success  of the  Company.  The  Company's  compensation  program  for
executive  officers  is  based  on  the  same  four  principles   applicable  to
compensation decisions for all employees of the Company:

     o  The Company pays competitively.

          The Company is  committed  to  maintaining  a pay  program  that helps
          attract and retain the best people in the industry. To ensure that pay
          is competitive,  the Company regularly compares its pay practices with
          those of other comparable  companies and sets its pay parameters based
          on this review.

     o  The Company pays for sustained performance.

          Executive  officers are  rewarded  based upon  corporate  performance,
          business  unit  performance  and  individual  performance.   Corporate
          performance  and business unit  performance are evaluated by reviewing
          the  extent  to which  strategic  and  business  plan  goals  are met,
          including  such  factors as  profitability,  performance  relative  to
          competitors   and  timely  new   product   introductions.   Individual
          performance  is evaluated by reviewing  organizational  and management
          development progress against set objectives.

     o  The Company strives for fairness in the administration of pay.

          The Company  strives to compensate a particular  individual  equitably
          compared to other executives at similar levels both inside the Company
          and at comparable companies.

     o  The Company strives to provide incentives designed to maximize
        stockholder value.

          The Company is committed to the use of stock  options as a significant
          component  of  total  compensation  in order  to  appropriately  align
          management's compensation with stockholder's interests.


   Compensation Vehicles

     The Company uses a total compensation program that consists of cash (salary
and bonus) and  equity-based  compensation.  Having a compensation  program that
allows the  Company to attract  and retain key  employees  permits it to provide
useful products and services to customers,  enhance stockholder value,  motivate
technological innovation,  foster teamwork, and adequately reward employees. The
vehicles are:


   Cash-based Compensation

   Salary

     The Company  establishes  salary  ranges for  employees  by  reviewing  the
aggregate  of base  salary and annual  bonus for  competitive  positions  in the
market against that individual's overall performance,  which is measured against
his or her individual responsibilities and strategic objectives for the year.

     In both setting goals and measuring  all  executive  officers'  performance
against  those  goals,  the Company  takes into account the  performance  of its
competitors  and general  economic  and market  conditions.  None of the factors
included in the Company's  strategic and business  goals are assigned a specific
weight.  Instead,  the Company recognizes that these factors may change in order
to  adapt  to  specific  business   challenges  and  to  changing  economic  and
marketplace conditions.


   Bonus

     The  Company  pays  bonuses   based  upon  (a)  the   Company's   financial
performance,  measured against established  corporate  performance for net sales
and profitability and (b) on the Committee's subjective


                                       13
<PAGE>

determination of the executive officer's individual  performance goals, measured
against individual management goals established for each executive.


   Equity-based Compensation

   Stock Incentive Program

     The purpose of this program is to provide  additional  incentives to senior
management to work to maximize  stockholder  value.  The Company also recognizes
that  a  stock  incentive  program  is a  necessary  element  of  a  competitive
compensation  package  for its senior  managers.  The program  utilizes  vesting
periods to encourage such employees to continue in the employ of the Company and
thereby acts as a retention device for its senior managers. The Company believes
that the program encourages senior managers to maintain a long-term perspective.
In  determining  the size of an  option  award  for an  executive  officer,  the
Compensation  Committee  reviews  such  individual's   performance  against  the
criteria  described  above and  considers  the  number of  outstanding  unvested
options which the officer  holds and the size of previous  option awards to that
individual. The Compensation Committee does not assign specific weights to these
items.


   Corporate Tax Deduction on Compensation in Excess of $1 Million a Year

     Section  162(m) of the  Internal  Revenue  Code  generally  disallows a tax
deduction to public  companies for  compensation in excess of $1 million paid to
the  Company's  Chief  Executive  Officer or any of the four  other most  highly
compensated executive officers. Certain performance-based compensation, however,
is specifically exempt from the deduction limit. The Company's current policy is
to structure  the  performance-based  portion of  compensation  of its executive
officers in a manner that complies with this provision.


   Chief Executive Officer Compensation

     Richard C. Birkmeyer has been President and Chief Executive  Officer of the
Company  since  December  30, 1996.  The  Compensation  Committee  used the same
compensation   policy  described  above  for  all  employees  to  determine  Mr.
Birkmeyer's fiscal 1998 compensation.

     In setting both the cash-based and equity-based elements of Mr. Birkmeyer's
compensation,  the  Compensation  Committee  made an overall  assessment  of Mr.
Birkmeyer's  leadership  in achieving  the  Company's  long-term  strategic  and
business  goals.  The  Compensation  Committee  assessed the  importance  of Mr.
Birkmeyer to the continued growth and development of the Company,  his increased
responsibility as a result of several recent acquisitions,  his expertise in the
industry, his management skills and ability to implement the Company's strategic
plans, his efforts to assemble a highly qualified executive  management team for
the  Company  and  the  achievement  of  various   strategic   milestones.   The
Compensation Committee does not assign specific weights to these categories.


   Base Salary

     Mr.  Birkmeyer's base salary for 1998 pursuant to his employment  agreement
dated  December  30,  1996 was  $180,000,  which  reflects  a  consideration  of
competitive  forces.  Pursuant to such agreement,  Mr.  Birkmeyer is entitled to
annual increases of not less than 5% of his then current salary as determined by
the Committee.  The Compensation  Committee has not made a determination whether
to increase Mr.  Birkmeyer's  base salary for fiscal year 1999. The Compensation
Committee  expects  to meet  with Mr.  Birkmeyer  in the near  future  to review
Mr.Birkmeyer's compensation for 1999.


   Bonus

     Pursuant  to his  employment  agreement,  Mr.  Birkmeyer  is entitled to an
annual  bonus as  determined  by the  Committee,  not to exceed  75% of his then
current salary.

     The  Compensation  Committee  follows the same policy  described  above for
other executive officers to determine Mr. Birkmeyer's bonus. The Company did not
meet  the   established   corporate   performance   goals   for  net  sales  and
profitability.  Accordingly,  the  Compensation  Committee  did  not  grant  Mr.
Birkmeyer a cash-bonus for 1998.




                                       14
<PAGE>

   Stock Options

     The  Compensation  Committee  follows the same policy  described  above for
other executive  officers to determine Mr.  Birkmeyer's  stock incentive awards.
Stock options are granted to encourage  and  facilitate  stock  ownership by the
executive  officers and thus strengthen  both their personal  commitments to the
Company and a longer-term perspective in their managerial responsibilities. This
component of an executive  officer's  compensation  directly links the officers'
interest with those of the Company's other stockholders.

     No additional options were granted to Mr. Birkmeyer during 1998.

                             COMPENSATION COMMITTEE

                             Richard J. Defieux
                             Robert E. Finnigan
                             Grover C. Wrenn






                                       15
<PAGE>



                                  OTHER MATTERS

Independent Auditors

     The  accounting  firm of KPMG LLP has served as the  Company's  independent
auditors since September 1998. A  representative  of KPMG LLP will be present at
the Meeting, and will be given the opportunity to make a statement if he desires
and will be available to respond to appropriate  questions.  Arthur Andersen LLP
was the Company's  principal  accounting  firm since  January 29, 1997,  and was
dismissed  by the  Board  in  September  1998.  KPMG  LLP was  EnSys'  principal
accounting firm and was dismissed by the Board in January 1997.  Arthur Andersen
LLP's reports on the financial  statements of SDI for 1996,  and the Company for
1997,  contained  no adverse  opinion  or  disclaimer  of opinion  nor were such
reports  qualified or modified as to  uncertainty,  audit scope,  or  accounting
principles.  Furthermore, during 1996 and 1997, there were no disagreements with
Arthur  Andersen  LLP on any  matter  of  accounting  principles  or  practices,
financial statement disclosure, or auditing scope or procedure. A representative
of Arthur Andersen LLP will not be present at the Meeting.

Stockholder Proposals

     The proxy  rules of the SEC permit  stockholders,  after  timely  notice to
issuers,  to present proposals for stockholder action in issuer proxy statements
where such  proposals are consistent  with  applicable  law,  pertain to matters
appropriate for stockholder action and are not properly omitted by issuer action
in accordance with the proxy rules.  Under applicable SEC rules,  such proposals
must be received by the Company no later than  December 1, 1999 to be considered
for  inclusion  in the  Company's  proxy  materials  relating to the 2000 Annual
Meeting.

General

     The Board knows of no matter other than the foregoing to be brought  before
the Meeting.  However,  the enclosed proxy gives discretionary  authority in the
event any additional matters should be properly presented.

     The Company's 1998 Annual Report,  including  financial  statements for the
fiscal year ended  December  31, 1998,  accompanies  this Proxy  Statement.  The
Company  will  provide  free of charge to any  stockholder  from whom a proxy is
solicited  pursuant to this Proxy  Statement,  upon  written  request  from such
stockholder,  a copy of the Company's  Annual Report on Form 10-K for the fiscal
year ended  December  31, 1998 which was filed with the SEC.  Requests  for such
report should be directed to Strategic  Diagnostics  Inc.,  111 Pencader  Drive,
Newark, Delaware 19702, Attention: Arthur A. Koch, Jr., Vice President and Chief
Operating Officer.

     The  accompanying  proxy is solicited by and on behalf of the Board,  whose
notice of meeting is attached to this Proxy  Statement.  The entire cost of such
solicitation will be borne by the Company.  In addition to the use of the mails,
proxies  may be  solicited  by  personal  interview,  telephone  or  telegram by
directors, officers and other employees of the Company who will not be specially
compensated  for these  services.  Additionally,  the Company  will request that
brokers, nominees, custodians and other fiduciaries forward soliciting materials
to the  beneficial  owners of shares held of record by such  brokers,  nominees,
custodians  and other  fiduciaries.  The Company will reimburse such persons for
their reasonable expenses in connection therewith.

     Certain  information  contained  in this Proxy  Statement  relating  to the
occupation and security holdings of the directors and officers of the Company is
based upon information received from the individual directors and officers.

PLEASE DATE, SIGN AND RETURN THE PROXY CARD AT YOUR EARLIEST  CONVENIENCE IN THE
ENCLOSED RETURN ENVELOPE.

                                        STRATEGIC DIAGNOSTICS INC.
                                        Newark, Delaware
                                        March 30, 1999
                                        


                                       16
<PAGE>
                           STRATEGIC DIAGNOSTICS INC.
                        1998 EMPLOYEE STOCK PURCHASE PLAN


I. Purpose.

     The  Strategic  Diagnostics  Inc. 1998  Employee  Stock  Purchase Plan (the
"Plan") is broadly based and intended to encourage and  facilitate  the purchase
of Shares of the Common Stock of Strategic Diagnostics Inc. (the "Company"),  by
employees  of the Company and any  Participating  Companies,  thereby  providing
employees  with a personal  stake in the Company and a long range  inducement to
remain in the  employ of the  Company  and  Participating  Companies.  It is the
intention of the Company that the Plan  qualify as an "employee  stock  purchase
plan" within the meaning of Section 423 of the Code.


II. Definitions.

     "Account"  means a  bookkeeping  account  established  by the  Committee on
behalf of a Participant to hold Payroll Deductions.

     "Approved Leave of Absence" means a leave of absence that has been approved
by the  applicable  Participating  Company  in such a manner  as the  Board  may
determine from time to time.

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

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

     "Committee"  means the  Committee  appointed  pursuant to Section 14 of the
Plan.

     "Company" means Strategic Diagnostics Inc. and any successor(s).

     "Compensation"  means an Employee's cash compensation  payable for services
to a Participating Company.

     "Election  Form"  means  the  form  acceptable  to the  Committee  which an
Employee  shall use to make an  election  to  purchase  Shares  through  Payroll
Deductions pursuant to the Plan.

     "Eligible  Employee"  means an  Employee  who  meets the  requirements  for
eligibility under Section 3 of the Plan.

     "Employee" means a person who is an employee of a Participating Company.

     "Fair  Market  Value"  means the closing  price per Share on the  principal
national  securities  exchange  on which the shares are  listed or  admitted  to
trading or, if not listed or traded on any such exchange, on the Nasdaq National
Market,  or if not listed or traded on any such  exchange  or  market,  the fair
market value as reasonably determined by the Board, which determination shall be
conclusive.

     "Five Percent Owner" means an Employee who, with respect to a Participating
Company, is described in Section 423(b) of the Code.

     "Offering"  means an offering of Shares to Eligible  Employees  pursuant to
the Plan.

     "Offering  Commencement  Date" means the first day of each January,  April,
July and October beginning on or after adoption of the Plan by the Board,  until
the Plan Termination  Date,  provided that the first Offering  Commencement Date
may be delayed until (i) the first day of the second month after adoption of the
Plan, if necessary to permit  Participants  to make elections in accordance with
Section  3(e) of the  Plan,  or  (ii)  the  first  day of any  calendar  quarter
following adoption of the Plan.

     "Offering Period" means the period extending from an Offering  Commencement
Date through the following Offering Termination Date.

     "Offering  Termination  Date"  means  the  last  day of each  March,  June,
September and December following an Offering Commencement Date.

     "Option  Price" means ninety  percent  (90%) of the lesser of: (1) the Fair
Market Value per Share on the Offering Commencement Date, or if such date is not
a trading day,  then on the next trading day  thereafter  or (2) the 


<PAGE>

Fair Market Value per Share on the Offering Termination Date, or if such date is
not a trading day, then on the next trading day thereafter.

     "Participant"  means an Employee who meets the requirements for eligibility
under Section 3 of the Plan and who has timely delivered an Election Form to the
Committee.

     "Participating  Company"  means, as provided in Schedule A, the Company and
subsidiaries  of the Company,  within the meaning of Section 424(f) of the Code,
if any, that are approved by the Board from time to time and whose employees are
designated as Employees by the Board.

     "Payroll   Deductions"   means  amounts   withheld  from  a   Participant's
Compensation pursuant to the Plan, as described in Section 5 of the Plan.

     "Plan" means Strategic  Diagnostics Inc. 1998 Employee Stock Purchase Plan,
as set forth in this document, and as may be amended from time to time.

     "Plan Termination Date" means the earlier of:

     The Offering  Termination Date for the Offering in which the maximum number
of Shares  specified  in Section5  of the Plan have been issued  pursuant to the
Plan; or

     The date as of which the Board chooses to terminate the Plan as provided in
Section 15 of the Plan.

     "Shares" means shares of Common Stock of the Company.

     "Successor-in-Interest"  means the Participant's executor or administrator,
or such other person or entity to whom the  Participant's  rights under the Plan
shall have passed by will or the laws of descent and distribution.

     "Termination  Form" means the form  acceptable  to the  Committee  which an
Employee  shall use to withdraw  from an  Offering  pursuant to Section 8 of the
Plan.


III. Eligibility and Participation.

     Initial  Eligibility.  Except as provided in Section 3(b) of the Plan, each
Employee shall be eligible to participate in the Plan.

     Ineligibility. An Employee shall not be eligible to participate in the Plan
if such Employee:

     Is a Five Percent Owner;

     Is a temporary Employee;

     Has been employed by a Participating  Company on a full-time basis for less
than  a  6-consecutive-month  period  ending  on  the  last  day  of  the  month
immediately  preceding  the  effective  date of an election  to purchase  Shares
pursuant to the Plan;

     Has  not  customarily   worked  more  than  20  hours  per  week  during  a
24-consecutive-month  period  ending  on the last day of the  month  immediately
preceding the effective date of an election to purchase  Shares  pursuant to the
Plan; or

     Is restricted from participating under Section 3(d) of the Plan.

     Leave of Absence. For purposes of participation in the Plan, an Employee on
an Approved  Leave of Absence shall be deemed to be an Employee for the first 90
days of such Approved Leave of Absence and such Employee's  employment  shall be
deemed to have  terminated for purposes of  participation  under the Plan at the
close of business on the 90th day of such Approved  Leave of Absence unless such
Employee  shall have  returned to regular  non-temporary  employment  before the
close of business on such 90th day. Termination by the Participating  Company of
an Employee's  Approved  Leave of Absence,  other than  termination or return to
non-temporary  employment,  shall  terminate an  Employee's  employment  for all
purposes of the Plan and shall  terminate such Employee's  participation  in the
Plan and the right to exercise any option. An Approved Leave of Absence shall be
considered active employment for purposes of Sections 3(b)(3) and 3(b)(4) of the
Plan.

     Restrictions on Participation.  Notwithstanding  any provisions of the Plan
to the contrary,  no Employee  shall be granted an option to  participate in the
Plan if:



                                      A-2
<PAGE>

     Immediately  after the grant,  such Employee would be a Five Percent Owner;
or

     Such option would permit such Employee's rights to purchase stock under all
employee  stock  purchase plans of the  Participating  Companies  which meet the
requirements  of Section  423(b) of the Code to accrue at a rate  which  exceeds
$25,000 in fair market value (as determined pursuant to Section 423(b)(8) of the
Code) for each calendar year in which such option is outstanding.

     Commencement  of  Participation.  An  Employee  who meets  the  eligibility
requirements  of Sections 3(a) and 3(b) of the Plan and whose  participation  is
not  restricted  under  Section 3(d) of the Plan shall become a  Participant  by
completing  an Election  Form and filing it with the  Committee on or before the
15th day of the month immediately  preceding the Offering  Commencement Date for
the first Offering to which such Election Form applies. Payroll Deductions for a
Participant shall commence on the applicable Offering Commencement Date when his
or her authorization for Payroll Deductions becomes effective,  and shall end on
the Plan Termination Date, unless sooner terminated by the Participant  pursuant
to Section 8 of the Plan.


IV. Shares Per Offering.

     The Plan shall be implemented by a series of Offerings that shall terminate
on  the  Plan  Termination  Date.  Offerings  shall  be  made  with  respect  to
Compensation  payable for each calendar  month of the Company's  fiscal year for
the period  commencing  with the first day of the month  first  occurring  on or
after  adoption  of the Plan by the Board and ending  with the Plan  Termination
Date.  Shares  available for any Offering  shall be the  difference  between the
maximum  number of  Shares  that may be issued  under  the Plan,  as  determined
pursuant to Section 10(a) of the Plan, for all of the Offerings, less the actual
number of Shares purchased by Participants  pursuant to prior Offerings.  If the
total  number  of  Shares  for  which  options  are  exercised  on any  Offering
Termination Date exceeds the maximum number of Shares  available,  the Committee
shall  make  a  pro  rata  allocation  of  Shares  available  for  delivery  and
distribution  in as nearly a  uniform  manner  as  practicable,  and as it shall
determine to be fair and equitable,  and the unapplied Account balances shall be
returned  to  Participants  as  soon  as  practicable   following  the  Offering
Termination Date.


V. Payroll Deductions.

     Amount  of  Payroll   Deductions.   An  Eligible  Employee  who  wishes  to
participate  in the Plan shall file an Election Form with the Committee at least
15 days before the Offering  Commencement  Date for the first Offering for which
such  Election  Form is  effective  on which he or she may elect to have Payroll
Deductions of such amounts designated by the Committee on the Election Form from
time to time made from his or her Compensation on each regular payday during the
time he or she is a Participant in the Plan, provided that the rules established
by the Committee shall be consistent with Section 423(b)(5) of the Code.

     Participants'   Accounts.   All  Payroll   Deductions  with  respect  to  a
Participant  pursuant  to  Section  5(a) of the Plan  shall be  credited  to the
Participant's Account under the Plan.

     Changes in Payroll  Deductions.  A Participant  may  discontinue his or her
participation  in the Plan as provided in Section 8(a) of the Plan, but no other
change can be made during an Offering, including, but not limited to, changes in
the amount of Payroll Deductions for such Offering. A Participant may change the
amount of Payroll  Deductions for subsequent  Offerings by giving written notice
of  such  change  to the  Committee  on or  before  the  15th  day of the  month
immediately  preceding the Offering Commencement Date for the Offering for which
such change is effective.

     Leave of Absence.  A Participant  who goes on an Approved  Leave of Absence
before the Offering  Termination  Date after having filed an Election  Form with
respect to such Offering may:

     Withdraw  the balance  credited  to his or her Account  pursuant to Section
8(b) of the Plan;

     Discontinue  contributions to the Plan but remain a Participant in the Plan
through the Offering Termination Date; or

     Remain a  Participant  in the Plan  during such  Approved  Leave of Absence
through the Offering  Termination  Date and continue the  authorization  for the
Participating  Company to make Payroll Deductions for each payroll period out of
continuing payments to such Participant, if any.




                                      A-3
<PAGE>

VI. Granting of Options.

     On each Offering Termination Date, each Participant shall be deemed to have
been  granted  an option to  purchase  a minimum  of one (1) Share and a maximum
number of Shares that shall be a number of whole  Shares  equal to the  quotient
obtained by dividing the balance credited to the Participant's Account as of the
Offering Termination Date, by the Option Price.

VII. Exercise of Options.

     Automatic Exercise.  With respect to each Offering,  a Participant's option
for the  purchase of Shares  granted  pursuant to Section 6 of the Plan shall be
deemed to have been exercised  automatically  on the Offering  Termination  Date
applicable to such Offering.

     Fractional Shares and Minimum Number of Shares. Fractional Shares shall not
be issued under the Plan.  Amounts  credited to an Account  remaining  after the
application  of such Account to the exercise of options for a minimum of one (1)
full  Share  shall  be  credited  to the  Participant's  Account  for  the  next
succeeding  Offering,  or,  at  the  Participant's  election,  returned  to  the
Participant  as soon as  practicable  following the Offering  Termination  Date,
without interest.

     Transferability  of Option. No option granted to a Participant  pursuant to
the Plan shall be transferable  other than by will or by the laws of descent and
distribution,  and no such option shall be exercisable  during the Participant's
lifetime other than by the Participant.

     Delivery of Certificates for Shares. The Company shall deliver certificates
for Shares acquired on the exercise of options during an Offering Period as soon
as practicable following the Offering Termination Date.

VIII. Withdrawals.

     Withdrawal  of Account.  A  Participant  may elect to withdraw  the balance
credited to the  Participant's  Account by providing a  Termination  Form to the
Committee at any time before the Offering  Termination  Date  applicable  to any
Offering.

     Amount of  Withdrawal.  A  Participant  may withdraw all, but not less than
all,  of  the  amounts  credited  to  the  Participant's  Account  by  giving  a
Termination Form to the Committee.  All amounts  credited to such  Participant's
Account shall be paid as soon as practicable  following the Committee's  receipt
of the Participant's Termination Form, and no further Payroll Deductions will be
made with respect to the Participant.

     Effect of Withdrawal on Subsequent Participation.  A Participant who elects
to  withdraw  from an  Offering  pursuant  to Section  8(a) of the Plan shall be
deemed  to have  elected  not to  participate  in  each  of the  two  succeeding
Offerings  following the date on which the Participant  gives a Termination Form
to the Committee.

     Termination of Employment.  Upon termination of a Participant's  employment
for any reason other than death,  including  termination  due to  disability  or
continuation of a leave of absence beyond 90 days, all amounts  credited to such
Participant's  Account shall be returned to the  Participant.  In the event of a
Participant's  (1)  termination  of  employment  due to death or (2) death after
termination  of  employment  but  before  the  Participant's  Account  has  been
returned,  all amounts credited to such Participant's  Account shall be returned
to the Participant's Successor-in-Interest without interest.

     Leave of Absence.  A  Participant  who is on an  Approved  Leave of Absence
shall,  subject to the  Participant's  election  pursuant to Section 5(d) of the
Plan,  continue  to be a  Participant  in the Plan  until  the end of the  first
Offering  ending  after  commencement  of such  Approved  Leave  of  Absence.  A
Participant  who has been on an Approved  Leave of Absence for more than 90 days
shall not be eligible to participate in any Offering that begins on or after the
commencement  of such Approved Leave of Absence so long as such leave of absence
continues.

IX. Interest.

     No interest  shall be paid or allowed with respect to amounts paid into the
Plan or credited to any Participant's Account.

X.  Shares.

     Maximum  Number of Shares.  No more than 661,157 Shares may be issued under
the Plan.  Such Shares may be unissued  shares or treasury shares of the Company
or may be outstanding shares purchased in the open market 


                                      A-4
<PAGE>

or otherwise on behalf of the Plan upon such terms as the  Committee may approve
for delivery under the Plan. The number of Shares available for any Offering and
all  Offerings  shall be  adjusted  if the number of  outstanding  Shares of the
Company is increased or reduced by split-up, reclassification, stock dividend or
the like. All Shares issued pursuant to the Plan shall be validly issued,  fully
paid and nonassessable.

     Participant's  Interest in Shares. A Participant  shall have no interest in
Shares subject to an option until such option has been exercised.

     Registration of Shares.  Shares to be delivered to a Participant  under the
Plan shall be registered in the name of the Participant.

     Restrictions  on  Exercise.  The Board may, in its  discretion,  require as
conditions  to the  exercise  of  any  option  such  conditions  as it may  deem
necessary  to  assure  that  the  exercise  of  options  is in  compliance  with
applicable securities laws.


XI. Expenses.

     The  Participating  Companies  shall  pay all  fees and  expenses  incurred
(excluding  individual Federal,  state, local or other taxes) in connection with
the  Plan.  No  charge  or  deduction  for any such  expenses  will be made to a
Participant upon the termination of his or her  participation  under the Plan or
upon the distribution of certificates  representing Shares purchased with his or
her contributions.


XII. Taxes.

     The  Participating  Companies  shall have the right to  withhold  from each
Participant's  Compensation an amount equal to all Federal, state, city or other
taxes as the Participating Companies shall determine are required to be withheld
by them. In connection with such withholding,  the  Participating  Companies may
make  any  such  arrangements  as are  consistent  with  the Plan as it may deem
appropriate,  including  the  right  to  withhold  from  Compensation  paid to a
Participant other than in connection with the Plan.


XIII. Plan and Contributions Not to Affect Employment.

     The Plan shall not confer upon any Eligible  Employee any right to continue
in the employ of the Participating Companies.


XIV. Administration.

     The  Plan  shall  be  administered   by  the  Board,   which  may  delegate
responsibility  for  such  administration  to a  committee  of  the  Board  (the
"Committee")  or  to a  third  party  administrator  under  Board  or  Committee
supervision.  If the Board fails to appoint the Committee, any references in the
Plan to the Committee shall be treated as references to the Board. The Board, or
the Committee,  shall have authority to interpret the Plan, to prescribe,  amend
and rescind  rules and  regulations  relating to it, to delegate  administrative
functions to a third party  administrator  and to make all other  determinations
deemed  necessary or advisable in  administering  the Plan,  with or without the
advice of  counsel.  The  determinations  of the Board or the  Committee  on the
matters  referred to in this Section 14 shall be conclusive and binding upon all
persons in interest.


XV. Amendment and Termination.

     The  Board may  terminate  the Plan at any time and may amend the Plan from
time to time in any respect; provided, however, that upon any termination of the
Plan,  all Shares or Payroll  Deductions  (to the extent not yet  applied to the
purchase of Shares)  under the Plan shall be  distributed  to the  Participants,
provided  further,  that no  amendment  to the Plan shall  affect the right of a
Participant to receive his or her proportionate interest in the Shares or his or
her Payroll Deductions (to the extent not yet applied to the purchase of Shares)
under the Plan,  and  provided  further  that the Company  may seek  stockholder
approval  of an  amendment  to the Plan if such  approval  is  determined  to be
required by or advisable  under the  regulations  of the Securities and Exchange
Commission or the Internal Revenue  Service,  the rules of any stock exchange or
system on which the Shares are listed or other applicable law or regulation.




                                      A-5
<PAGE>

XVI. Effective Date.
 
     The Plan shall be effective on the date it is adopted by the Board.  In the
event that the Plan is not  approved by the  Company's  stockholders  within one
year of the adoption of the Plan by the Board,  the tax treatment of Section 423
of the Code may not apply with respect to Shares  transferred to Participants on
the exercise of options pursuant to Section 7 of the Plan.


XVII. Government and Other Regulations.

     In General.  The  purchase of Shares under the Plan shall be subject to all
applicable  laws,   rules  and  regulations,   and  to  such  approvals  by  any
governmental agencies as may be required.

     Securities Law. The Committee shall have the power to make each grant under
the Plan subject to such  conditions  as it deems  necessary or  appropriate  to
comply with the  then-existing  requirements  of the  Securities Act of 1933, as
amended,  and the  Securities  Exchange Act of 1934, as amended,  including Rule
16b-3 (or any similar rule) of the Securities and Exchange Commission.


XVIII. Non-Alienation.

     No  Participant  shall be permitted to assign,  alienate,  sell,  transfer,
pledge or otherwise  encumber  his or her  interest  under the Plan prior to the
distribution  to him or her of Share  certificates.  Any attempt at  assignment,
alienation,  sale, transfer, pledge or other encumbrance shall be void and of no
effect.


XIX. Notices.

     Any notice required or permitted hereunder shall be sufficiently given only
if  delivered  personally,  telecopied,  or sent by first  class  mail,  postage
prepaid, and addressed:

     If to the Company:

     Strategic Diagnostics Inc.
     111 Pencader Drive
     Newark, DE 19702
     Attn: Chief Financial Officer
     Or any other address provided pursuant to written notice.

     If to the Participant:

     At the address on file with the Company from time to time, or to such other
address as either party may hereafter  designate in writing by notice  similarly
given by one party to the other.


XX. Successors.

     The Plan shall be binding  upon and inure to the benefit of any  successor,
successors or assigns of the Company.

XXI. Severability.

     If any part of this Plan shall be  determined  to be invalid or void in any
respect, such determination shall not affect, impair,  invalidate or nullify the
remaining provisions of this Plan which shall continue in full force and effect.


XXII. Acceptance.

     The  election  by  any  Eligible  Employee  to  participate  in  this  Plan
constitutes  his or her  acceptance  of the  terms  of the  Plan  and his or her
agreement to be bound hereby.


XXIII. Applicable Law.

     This Plan shall be  construed in  accordance  with the laws of the state of
Delaware, to the extent not preempted by applicable Federal law.




                                      A-6
<PAGE>

                                   SCHEDULE A


                             Participating Companies


     Strategic Diagnostics Inc.

     TSD BioServices, Inc.

     HTI Bio-Products, Inc.

     Strategic Diagnostics Inc., Europe




                                      A-7
<PAGE>

                           STRATEGIC DIAGNOSTICS INC.
                               111 Pencader Drive
                             Newark, Delaware 19702

                Annual Meeting of Stockholders - April 27, 1999
              Proxy Solicited on Behalf of the Board of Directors

The Undersigned, revoking all prior proxies, hereby appoints Robert E. Finnegan
and Richard J. Defieux as Proxies, with full power of substitution to each, to
vote for and on behalf of the undersigned at the 1999 Annual Meeting of
Stockholders of STRATEGIC DIAGNOSTICS INC. to be held at the Christiana Hilton,
100 Continental Drive, Newark, Delaware 19713, on Tuesday, April 27, 1999, at
10:00 a.m. local time, and at any adjournment or adjournments thereof. The
undersigned hereby directs the said proxies to vote in accordance with their
judgment on any matters which may properly come before the Annual Meeting, all
as set forth in the Notice of Annual Meeting, receipt of which is hereby
acknowledged, and to act on the following matters set forth in such notice as
specified by the undersigned.

THIS PROXY, WHEN PROPERLY EXECUTED, WILL BE VOTED AS DIRECTED HEREIN BY THE
UNDERSIGNED STOCKHOLDER(S). IF NO DIRECTION IS GIVEN, THIS PROXY WILL BE VOTED
"FOR" PROPOSALS 1, 2 AND 3.

PLEASE VOTE, DATE AND SIGN ON REVERSE AND RETURN PROMPTLY IN THE ENCLOSED
ENVELOPE.

Please sign exactly as your name(s) appear(s) on the books of the Company. Joint
owners should each sign personally, Trustees, custodians, and other fiduciaries
should indicate the capacity in which they sign, and where more than one name
appears, a majority must sign. If the stockholder is a corporation, the
signature should be that of an authorized officer who should indicate his or her
title.

HAS YOUR ADDRESS CHANGED?                   DO YOU HAVE ANY COMMENTS?
__________________________________          ____________________________________
__________________________________          ____________________________________
__________________________________          ____________________________________

                                       18



<PAGE>

STRATEGIC DIAGNOSTICS INC.   I. Election of Class 1 Directors

                                                   For  Withheld  For All Except

RECORD DATE SHARES:          Grover C. Wrenn       [ ]    [ ]          [ ]
                             Richard C. Birkmeyer  [ ]    [ ]          [ ]
                             Kathleen E. Lamb      [ ]    [ ]          [ ]
                             Curtis Lee Smith Jr.  [ ]    [ ]          [ ]

                             NOTE:If your do not wish your shares voted "For" a
                             particular nominee, mark the "For All Except" box
                             and strike a line through the nominee's(s')
                             name(s). Your shares will be voted for the
                             remaining nominee(s).

                             2. To approve amendments to the Company's 1995
                             Stock Incentive Plan (to be renamed the Strategic
                             Diagnostics Inc. 2000 Stock Incentive Plan) to
                             Increase the number of shares authorized for
                             issuance from 1,700,000 to 2,500,000.

[X]   PLEASE MARK VOTES 
      AS IN THIS EXAMPLE                           For  Against   Abstain

                                                   [ ]    [ ]          [ ]


                             3. To approve the Company's Employee Stock
                             Purchase Plan.

                                                   For  Against   Abstain

                                                   [ ]    [ ]       [ ]
 
Please be sure to sign and   In their discretion, the proxies are authorized to
date this Proxy.             vote upon any other business that may properly come
                             before the meeting or at any adjournment thereof.

__________________________   Date__________________
Stockholder sign here

__________________________   Date__________________
Co-owner sign here

                             Mark box at right if an address change or 
                             comment has been noted on the reverse side    [ ]
                             of this card.

        DETACH CARD                                         DETACH CARD

                          STRATEGIC DIAGONOSTICS INC.

Dear Stockholder, 

Please take note of the important information regarding the Company's management
and financial results enclosed with this Proxy Ballot.

Your votes on the election of the Company's directors and the other proposals
are important and you are strongly encouraged to exercise your right to vote
your shares.

Please mark the boxes on this proxy card to indicate how your shares will 
be voted. Then sign the card, detach it and return your proxy vote in the
enclosed postage paid envelope.

Your vote must be received prior to the Annual Meeting of Stockholders on April
27, 1999.

Thank you in advance for your prompt consideration of these matters.

Sincerely,



Strategic Diagnostics Inc.



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