<PAGE>


EXHIBIT 10.25

                         EXECUTIVE EMPLOYMENT AGREEMENT

         THIS EXECUTIVE EMPLOYMENT AGREEMENT is made as of the May 31, 2000, by
and between CHESAPEAKE BIOLOGICAL LABORATORIES, INC., a Maryland corporation
(the "Corporation"), and THOMAS P. RICE (the "Executive").

                                    RECITALS

         The Executive is the President and Chief Executive Officer of the
Corporation. The Corporation and the Executive are parties to an Executive
Employment Agreement, dated as of January 11, 1999 (the "Prior Agreement"). The
Corporation and the Executive consider it in their mutual best interests that
they enter into a new Executive Employment Agreement to replace the Prior
Agreement and to define the terms and conditions of the Executive's continued
employment.

         NOW, THEREFORE, in consideration of the foregoing and of the mutual
covenants and agreements hereinafter contained, the Corporation and the
Executive hereby agree as follows:

         1.       FULL-TIME EMPLOYMENT OF EXECUTIVE.

                  1.1.     DUTIES AND STATUS.

                           (a)   The Corporation shall continue to engage the
Executive as a full-time executive employee for the period specified in Section
4 hereof (the "Employment Period"), and the Executive accepts such employment,
on the terms and conditions set forth in this Agreement. At all times during the
Employment Period, the Executive shall hold the offices of President and Chief
Executive Officer and shall serve as a member of the Board of Directors. During
the Employment Period: (i) the Executive shall exercise such authority and
perform such executive duties as are commensurate with the duties of President
and Chief Executive Officer of the Corporation, and (ii) the Executive shall be
annually nominated as a director of the Corporation. During the Employment
Period, there shall be no material decrease in the responsibilities and duties
of the Executive, unless otherwise agreed to in writing by the Corporation and
the Executive.

                           (b)   During the Employment Period, the Executive
shall (i) devote substantially all of his time and efforts to the business of
the Corporation and its subsidiaries; (ii) not engage in consulting work or any
trade or business for his own account or for or on behalf of any other person,
firm or corporation which competes or conflicts or interferes with the
performance of his duties hereunder in any way; and (iii) accept such additional
office or offices with the Corporation or its subsidiaries to which he may be
elected by the Board of Directors of the Corporation, provided that the
performance of the duties of such office or offices shall be consistent with the
scope and nature of the duties provided for in paragraph (a) of this Section
1.1. The foregoing shall not preclude the Executive from devoting a reasonable
amount of his time to (i) management of his personal business investments, (ii)
civic and charitable affairs, (iii) supervision of his personal investments and
(iv) serving on boards of directors of other


                                       47
<PAGE>


corporations, provided, in each case, that such activities do not interfere with
the performance of the Executive's duties under this Agreement.

                           (c)   The Executive shall be required to perform the
services and duties provided for in paragraph (a) of this Section 1.1 only at
the location of the executive offices of the Corporation in the Baltimore
metropolitan area.

                           (d)   The Executive shall be entitled to vacations,
leaves of absence and leaves for illness or temporary disability in accordance
with the policies of the Corporation as in effect from time to time, which
policies shall not be less favorable than those in effect at the date of this
Agreement. Any leave on account of illness or temporary disability which is less
than total disability as defined in the Corporation's long-term disability
insurance plan ("Total Disability") and which continues for a continuous period
of less than 180 consecutive days shall not constitute a breach by the Executive
of his obligations hereunder.

                  1.2.     COMPENSATION AND GENERAL BENEFITS. As compensation
for his services under this Agreement, the Executive shall be compensated as
follows:

                           (a)   The Corporation shall initially pay the
Executive an annual base salary of $200,000, which shall be payable in periodic
equal installments no less frequent than the periodic installments in effect for
salaries of senior executives of the Corporation immediately prior to the
effective date of this Agreement. Such base salary shall be subject to normal
periodic review by the Compensation Committee of the Board of Directors of the
Corporation (the "Compensation Committee"), at least annually, for increases
based on the policies established by the Compensation Committee and based on the
Executive's contributions to the enterprise.

                           (b)   The Executive also shall be eligible for annual
bonus compensation payments, based upon his contribution to the Corporation's
business and the Corporation's financial condition and recent results of
operations, in such amounts, if any, as the Compensation Committee considers
appropriate in its sole and absolute discretion. Any such bonus compensation,
whether in the form of cash paid to the Executive as a bonus or as part of a
profit or incentive cash compensation program established from time to time, or
in the form of stock options or other equity-based grants under the
Corporation's incentive plans, are hereinafter referred to as "Incentive
Compensation." Nothing in this Agreement, however, shall be deemed to require
the Corporation to pay any Incentive Compensation to Executive. For purposes of
determining the amount of the Executive's Incentive Compensation resulting from
the grant of a stock option, the value of any such option shall be determined
using the Black-Scholes formula as of the date of grant.

                           (c)   During the Employment Period, the Executive
shall be entitled to such fringe benefits as are now or hereafter made available
to the Corporation's executive officers generally and to participate in the
Corporation's 401(k) plan, as well as such plans of the Corporation relating to
stock options, employee stock ownership, pension, thrift, profit-sharing, group
life insurance, medical coverage, education, or other retirement or employee
benefits as the Corporation has adopted or may hereafter adopt for the benefit
of its executive officers. If requested to do so by the Executive, the
Corporation agrees to promptly reimburse the Executive


                                       48
<PAGE>


for his payment of the premiums on the Executive's current family Blue Cross
medical insurance during the Employment Period, in lieu of the Executive's
participation in the Corporation's group medical insurance plan. The Executive
shall include copies of the relevant premium invoices whenever he requests such
reimbursement.

                           (d)   The Corporation shall reimburse the Executive
for his reasonable out-of-pocket expenses incurred in connection with performing
his duties hereunder on behalf of the Corporation, subject to the Executive's
compliance with the Corporation's policies for expense reimbursement as in
effect from time to time.

                           (e)   No later than execution of this Agreement, the
Corporation shall sell to the Executive 100,000 shares of its Class A Common
Stock in accordance with the terms approved by the Compensation Committee on May
25, 2000.

                           (f)   During the Employment Period, the Corporation
shall maintain a "split dollar" term insurance policy in the face amount of
$500,000 on the life of Executive, with the beneficiary thereof to be such
person, trust or entity as Executive shall designate from time to time. During
the Employment Period, the Corporation shall pay all premiums as and when due on
such policy, and upon termination or expiration of the Employment Period, the
Corporation shall assign such policy to Executive. The Corporation at all times
shall be free to purchase insurance up to an amount of $1,000,000 on the life of
Executive, naming the Corporation or its designees as beneficiary, and Executive
agrees to cooperate fully in applying for such insurance, including submitting
to medical examinations.

         2.       COMPETITION; CONFIDENTIAL INFORMATION.

                  The Executive and the Corporation recognize that due to the
nature of his position with the Corporation, the Executive has had access to and
has acquired, will have access to and will acquire, and will assist in
developing, confidential and proprietary information relating to the business
and operations of the Corporation and its subsidiaries and affiliates,
including, without limiting the generality of the foregoing, information with
respect to their present and prospective products, systems, customers, agents,
processes and sales and marketing methods. The Executive acknowledges that such
information has been and will continue to be of central importance to the
business of the Corporation and its affiliates and that disclosure of it to or
its use by others could cause substantial loss to the Corporation. The Executive
and the Corporation also recognize that an important part of the Executive's
duties will be to develop good will for the Corporation and its affiliates
through his personal contact with customers, agents and others having business
relationships with the Corporation and its subsidiaries and affiliates, and that
there is a danger that this good will, a proprietary asset of the Corporation
and its subsidiaries and affiliates, may follow the Executive if and when his
relationship with the Corporation is terminated. The Executive accordingly
agrees as follows:

                  2.1.     NON-COMPETITION.

                  At all times during the Employment Period and for a period of
one (1) year after expiration or termination of the Employment Period, other
than as a result of a termination by the Corporation without cause (pursuant to
Section 4.2):


                                       49
<PAGE>


                           (a)   the Executive will not, directly or indirectly,
either individually or as owner, partner, agent, employee, consultant or
otherwise, except for the account of and on behalf of the Corporation or its
subsidiaries or affiliates, engage in any activity competitive with the business
of the Corporation or its subsidiaries or affiliates;

                           (b)   the Executive will not, directly or indirectly,
solicit or otherwise attempt to establish for himself or any person, firm or
entity, other than the Corporation or its subsidiaries or affiliates, any
business relationship with any person, firm or corporation which was, at the
time of termination of the Employment Period, a customer of the Corporation or
one of its subsidiaries or affiliates, but only to the extent such business
relationship would be competitive with the business of the Corporation or its
subsidiaries or affiliates; and

                           (c)   the Executive will not, directly or indirectly,

either individually or as owner, agent, employee, consultant or otherwise,
except for the account of and on behalf of the Corporation or its subsidiaries
or affiliates, solicit or otherwise attempt to establish for himself or any
other person, firm or entity, any employment, agency, consulting or other
relationship with any person (except any person with whom the Executive had a
business relationship prior to his employment with the Corporation hereunder,
other than solely through his previous affiliation with the Corporation as a
director) who was an employee of the Corporation or its subsidiaries or
affiliates at any time within one year before termination or expiration of the
Employment Period.

                  2.2.     INVESTMENTS. Nothing in this Section 2 shall be
construed to prevent the Executive from owning, as an investment, not more than
2% of a class of equity securities issued by any competitor of the Corporation
or its affiliates and publicly-traded and registered under Section 12 of the
Securities Exchange Act of 1934.

                  2.3.     TRADE SECRETS. The Executive will keep confidential
any and all trade secrets and confidential or proprietary information of the
Corporation and its subsidiaries and affiliates which are now known to him or
which hereafter may become known to him as a result of his employment or
association with the Corporation and shall not at any time directly or
indirectly disclose any such information to any person, firm or corporation, or
use the same in any way other than in connection with the business of the
Corporation or its affiliates during and at all times after the expiration of
the Employment Period. For purposes of this Agreement, "trade secrets and
confidential or proprietary information" means information unique to the
Corporation or any of its subsidiaries or affiliates which has a significant
business purpose and is not known or generally available from sources outside
the Corporation or any of its affiliates or typical of industry practice.

                  2.4.     COMPANY PROPERTY. All correspondence, records,
documents, software, promotional materials and other Corporation property,
including all copies, which come into Executive's possession by, through or in
the course of his employment, regardless of the source and whether created by
Executive, are the sole and exclusive property of the Corporation, and
immediately upon the termination of Executive's employment, Executive shall
return to the Corporation all such property of the Corporation.


                                       50
<PAGE>


         3.       CORPORATION'S REMEDIES FOR BREACH.

                  It is recognized that damages in the event of breach of
Section 2 by the Executive would be difficult, if not impossible, to ascertain,
and it is therefore agreed that the Corporation, in addition to and without
limiting any other remedy or right it may have, shall have the right to an
injunction or other equitable relief in any court of competent jurisdiction,
enjoining any such breach, and the Executive hereby waives any and all defenses
he may have on the ground of lack of jurisdiction or competence of the court to
grant such an injunction or other equitable relief. The existence of this right
shall not preclude any other rights and remedies at law or in equity which the
Corporation may have.

         4.       EMPLOYMENT PERIOD.

                  4.1.   DURATION.  The Employment Period shall commence on
June 1, 2000, and shall continue through May 31, 2002; PROVIDED, HOWEVER, the
Employment Period shall be renewed for one year beginning on June 1, 2002, if
the Executive gives the Corporation advance written notice, on or before
February 28, 2002, of such one year renewal of the Employment Period.
Notwithstanding the preceding sentence, the Employment Period shall
automatically terminate upon the Executive's death, retirement or Total
Disability, upon a termination by the Corporation for cause under Section 4.2
hereof or as provided in Section 5 hereof as the result of a Change in Control
(as hereinafter defined). In the event that the Employment Period shall
terminate upon the Executive's death, retirement or Total Disability, or for
cause under Section 4.2 hereof, the Corporation shall pay the Executive his base
salary and any Incentive Compensation (to the extent accrued) through the date
of such termination, at the rate or rates then in effect, and the Corporation
shall have no further obligation to the Executive under this Agreement. Any
reference herein to "termination" of the Executive's employment shall not be
deemed to mean or include the cessation of the Executive's employment with the
Corporation as a result of expiration of the Employment Period in accordance
with the terms of this Agreement.

                  4.2.   TERMINATION FOR CAUSE.  The Executive's employment
under this Agreement may be terminated by the Board of Directors of the
Corporation for "cause". As used in this Agreement, termination for "cause"
shall mean the Executive's termination for gross negligence, commission of a
felony, incompetence, fraud or dishonesty involving the Corporation's assets,
intentional failure to perform his duties hereunder or any other material breach
by the Executive of this Agreement (including, without limitation, Section 2
hereof). The Corporation shall notify the Executive in writing at least 15 days
in advance of any proposed termination for cause, indicating in detail the
specific reasons for such termination, and shall extend to the Executive the
opportunity during such 15 days to cure the breach or misconduct if the same is
capable of being cured. In the event that the Executive's employment under this
Agreement is terminated for cause, the Corporation shall pay the Executive his
base salary and any Incentive Compensation (to the extent accrued through the
date of such termination), at the rate or rates then in effect, and the
Corporation shall have no further obligation to the Executive under this
Agreement.


                                       51
<PAGE>


                  4.3.     TERMINATION WITHOUT CAUSE.

                           (a)   In the event the Executive's employment
hereunder is terminated without cause other than a termination as a result of,
in connection with or following a Change in Control pursuant to Section 5, the
Executive shall be entitled to receive the greater of (x) the compensation
described in Section 1.2(a) of this Agreement for the unexpired remainder of the
Employment Period, or (y) one year's annual salary as in effect on the date of
such termination, in either case together with (i) an amount equal to the
Incentive Compensation, if any, the Executive received, or which was accrued by
the Corporation for the benefit of the Executive, during the twelve-months'
period immediately preceding such termination, and (ii) the benefits described
in Section 1.2(c) of this Agreement (other than those benefits, such as stock
option grants, participation in any profit sharing plan or education benefits,
which are available only to employees of the Corporation, except that, in the
case of health, life, disability and other insurance plans or programs in which
the Executive participated immediately prior to the termination, such benefits
shall continue, provided that the Executive's continued participation is
permissible under the general terms and provisions of such plans or programs, or
in the event that such continued participation is barred or not otherwise
permissible or available, the Corporation shall arrange to provide the
Executive, at the expense of the Corporation, with benefits substantially
similar to those which the Executive had been receiving under such plans health,
life, disability and other insurance and programs immediately prior to the time
of termination of the Executive's employment for the unexpired remainder of the
Employment Period). All payments under this Section 4.3(a) shall be made in
three substantially equal monthly installments, commencing on the first day of
the first calendar month immediately following the month during which the date
of termination occurred and continuing on the first day of each of the two
immediately succeeding consecutive calendar months, without present value
discount, except that if the Corporation is to continue to provide benefits
pursuant to clause (ii) above, it shall do so for the longer of the unexpired
remainder of the Employment Period or one year from the date of such
termination.

                           (b)   The Executive shall not be required to mitigate
the amount of any payment or benefit to which he may be entitled under any
provision of this Agreement by seeking other employment, nor shall any such
amount be reduced by remuneration earned from other sources if his employment is
terminated without cause.

                           (c)   The Executive agrees that the compensation and
benefits to which he shall be entitled in the event of termination of his
employment hereunder without cause shall be in lieu of all other claims which
the Executive may make against the Corporation by reason of such termination of
employment. Reference herein to termination of the Executive's employment
hereunder "without cause" shall not mean or include, but shall specifically
exclude, termination upon death, retirement or Total Disability of the
Executive.

                           (d)   The Executive and the Corporation recognize
that, due to the relationship of the Executive and the Corporation and such
relationship's susceptibility to public comment which may be injurious to the
Executive or the Corporation, or both, it is necessary for the protection of
both parties that neither party make any disparaging public statements
concerning the termination of this Agreement and the arrangements made pursuant
thereto. The Executive and the Corporation, accordingly, agree that neither the
Executive nor the Corporation


                                       52
<PAGE>


will make any public comments about the other at any time following the
termination of this Agreement without the express prior approval of the other
party, which approval shall not be unreasonably withheld, conditioned or
delayed, and subject in any event to any obligation on the part of the
Corporation under applicable law, including federal securities laws, to issue a
press release or otherwise to make public comment regarding such matters.

         5.       CHANGE IN CONTROL.

                  5.1      TERMINATION IN CONNECTION WITH CHANGE IN CONTROL.

                           (a)   If, during the term of this Agreement, there is
a "Change in Control" of the Corporation, the Executive's employment hereunder
may be terminated: (i) either by the Corporation or the Executive, effective on
the date of such Change in Control, provided that written notice of such
termination is provided to the other party at least twenty (20) days prior to
the effective date of such Change in Control, and (ii) by the Executive at any
time within six (6) months following such Change in Control, provided that the
Executive provides the Corporation with at least thirty (30) days advance
written notice of such termination. If the Executive or the Corporation
terminates the Executive's employment under this Agreement as provided in the
preceding sentence (unless such termination occurs by virtue of Executive's
normal retirement, Total Disability or death, or the Employment Period expires
or is not renewed), as consideration for services previously rendered to the
Corporation and in lieu of any future payments to the Executive under Section
1.2(a) hereof, the Executive will be entitled to receive a lump sum cash payment
as provided for herein (an "Involuntary Severance Payment"), and, upon payment
of such Involuntary Severance Payment, the Corporation shall have no further
obligation to the Executive under this Agreement. The amount of the Involuntary
Severance Payment shall equal two times the sum of Executive's then effective
annual salary plus any Incentive Compensation paid by the Corporation to, and/or
accrued for the benefit of, the Executive during the twelve-months' period
immediately preceding such termination of employment. The amount of the
Involuntary Severance Payment shall not be reduced by any compensation which the
Executive may receive from other employment with another employer after
termination of his employment with the Corporation, and the Involuntary
Severance Payment shall be paid no later than five (5) days after termination of
the Executive's employment pursuant to this Section 5.1(a).

                           (b)   The Corporation agrees to cause the
Compensation Committee of the Board of Directors to cause all stock options
granted to the Executive, whether pursuant to the Corporation's Stock Option
Plans or otherwise, to provide that all options granted under those agreements
(including the options granted under Section 1(e) hereof) shall automatically
become completely vested no later than immediately prior to any Change in
Control.

                  5.2   DEFINITION OF CHANGE IN CONTROL.  For purposes of this
Agreement, a "Change in Control" of the Corporation shall be deemed to have
occurred if (i) any person, entity or group of persons or entities acting in
concert (collectively, a "Person") becomes or become the beneficial owners of
50% or more of the then outstanding shares of Common Stock of the Corporation,
(ii) any Person holds revocable or irrevocable proxies entitling them to vote
50% or more of the then outstanding shares of the Corporation's Common Stock
(other than the persons named as proxies in any Proxy Statement prepared by
management of the Corporation in


                                       53
<PAGE>


connection with an annual or special meeting of stockholders called by an
officer or the Board of Directors of the Corporation), (iii) a merger, sale of
substantially all the assets of the Corporation, share exchange, consolidation
or other business combination (as defined in the Maryland General Corporation
Law) of the Corporation and any other Person, as a result of which the
Corporation's Common Stock becomes exchangeable for other securities or property
or cash, or (iv) if a majority of the members of the Board of Directors is
replaced during any 12 month period during the Employment Period but only if the
directors who replace such majority have not been elected either by the
remaining members of the Board of Directors or by the stockholders of the
Corporation.

         6.       CERTAIN ADDITIONAL PAYMENTS BY THE CORPORATION.

                  6.1   EXCISE TAX PROTECTION.  In the event it shall be
determined that any payment or distribution by the Corporation to or for the
benefit of the Executive (whether paid or payable or distributed or
distributable pursuant to the terms of this Agreement or otherwise, but
determined without regard to any additional payments required under this Section
6) (a "Payment") would be subject to the excise tax imposed by Section 4999 (or
any successor provision) of the Internal Revenue Code of 1986, as amended, or
any interest or penalties are incurred by the Executive with respect to such
excise tax (such excise tax, together with any such interest and penalties, are
hereinafter collectively referred to as the "Excise Tax"), then the Corporation
shall pay to the Executive an additional amount (a "Gross-Up Payment") such
that, after payment by the Executive of all income and employment taxes and any
Excise Tax imposed upon the Gross-Up Payment, the Executive will retain an
amount of the Gross-Up Payment equal to the Excise Tax imposed upon the
Payments.

                  6.2   DETERMINATIONS.  Subject to the provisions of
Section 6.3 below, all determinations required to be made under this Section
6.2, including whether and when a Gross-Up Payment is required, the amount of
such Gross-Up Payment and the assumptions to be utilized in arriving at such
determination, shall be made by the Corporation's then independent auditors (the
"Accountants"), who shall provide detailed supporting calculations both to the
Corporation and the Executive within 15 business days of the receipt of notice
from the Executive that there has been a Payment, or such earlier time as may be
requested by the Corporation. The Accountants may employ and rely upon the
opinion of legal counsel to the extent they deem necessary or advisable. All
fees and expenses of the Accountants shall be borne solely by the Corporation.
Any Gross-Up Payment determined pursuant to this Section 6 shall be paid by the
Corporation to the Executive within five (5) business days of the Corporation's
receipt of the Accountants' determinations. If the Accountants determine that no
Excise Tax is payable by the Executive, the Accountants shall furnish the
Executive with a written opinion that failure to report the Excise Tax on the
Executive's applicable federal income tax return will not result in the
imposition of a negligence or similar penalty. Any determination by the
Accountants shall be binding upon the Corporation and the Executive. If no
Gross-Up Payment is made by the Corporation or any Gross-Up Payment which is
made by the Corporation is determined by the Internal Revenue Service to be
insufficient to satisfy the Excise Taxes and/or all applicable income taxes
incurred by the Executive on the Gross-Up Payment (in either case, an
"Underpayment"), and the Executive thereafter is required to make a payment of
any Excise Tax, the Accountants shall determine the amount of the Underpayment
that has occurred, and any such Underpayment shall be promptly paid by the
Corporation to or for the benefit of the Executive. The Executive shall promptly
notify the Corporation in writing of any claim by the Internal Revenue Service
that, if successful, would result in the assessment or collection of any
Underpayment, and shall permit the Corporation to participate in any proceedings
relating to such claim if the Corporation wishes to contest the Internal Revenue
Service's claim. The Corporation shall bear and pay directly all costs and
expenses (including additional interest and penalties) incurred in connection
with any such contest and shall indemnify and hold the Executive harmless, on an
after-tax basis, for any Excise Tax or income tax (including interest and
penalties with respect thereto) imposed as a result of such representation and
payment of costs and expenses.

                  6.3.  REFUNDS.  If, after the receipt by the Executive of any
amount paid or advanced by the Corporation in connection with a contest
undertaken pursuant to Section 6.2, the Executive becomes entitled to receive
any refund or credit with respect thereto, the Executive shall (subject to the
Corporation's complying with


                                       54
<PAGE>


Section 6.2) promptly pay to the Corporation the amount of such refund or credit
(together with any interest paid or credited thereon after taxes applicable
thereto).

         7.       INTEREST ON OVERDUE PAYMENTS.

                  The Executive shall be entitled to receive interest (at the
prime rate of interest as then announced by the Corporation's then bank lenders)
on any payment due to Executive hereunder which is not paid when due (other than
payments deferred with the consent of Executive).

         8.       NOTICES.

                  Any notices, requests, demands and other communications
provided for by this Agreement shall be sufficient if in writing and if sent by
registered or certified mail to the Executive at the last address he has filed
in writing with the Corporation or, in the case of the Corporation, at its
principal executive offices.

         9.       BINDING AGREEMENT.

                  This Agreement shall be effective as of the date hereof and
shall be binding upon and inure to the benefit of the Executive, his executors,
administrators and personal representatives. The rights and obligations of the
Corporation under this Agreement shall inure to the benefit of and shall be
binding upon the Corporation and any successor of the Corporation as defined in
the Maryland General Corporation Law as now in effect; provided that (i) this
Agreement shall be binding upon any successor of the Corporation who is a vendee
or other transferee of substantially all of the assets of the Corporation only
insofar as the obligations of the Corporation hereunder shall have been
expressly assumed by such vendee or transferee in connection with or pursuant to
such transfer; (ii) this Agreement may not be assigned by the Corporation
without the consent of the Executive, and (iii) in the case of a successor by
sale or transfer of all or substantially all of the assets of the Corporation,
or any other successor in which the Corporation does not cease to exist by
operation of the transaction in question as a matter of law, the Corporation or
such successor shall not be relieved of its obligations hereunder. All
references herein to the Corporation shall be deemed to include any such
successor who shall become obligated to the Executive hereunder.

         10.      ENTIRE AGREEMENT; GOVERNING LAW; SEVERABILITY.

                           (a)   This Agreement constitutes the entire
understanding of the Executive and the Corporation with respect to the subject
matter hereof and supersedes any and all prior understandings between the
parties written or oral, including without limitation, the Prior Agreement. This
Agreement may not be changed, modified or discharged orally, but only by an
instrument in writing signed by the parties. The Executive's or Corporation's
failure to insist upon strict compliance with any provision hereof shall not be
deemed to be a waiver of such provision or any other provision hereof.

                           (b)   This Agreement shall be governed by the laws of
the State of Maryland, and the invalidity or unenforceability of any provisions
hereof shall in no way affect the validity or enforceability of any other
provision.


                                       55
<PAGE>


                           (c)   Any provision of this Agreement which is
prohibited or unenforceable in any jurisdiction shall, as to such jurisdiction,
be deemed severable from the remainder of this Agreement, and the remaining
provisions contained in this Agreement shall be construed to preserve to the
maximum permissible extent the intent and purposes of this Agreement. Any such
prohibition or unenforceability in any jurisdiction shall not invalidate or
render unenforceable such provision in any other jurisdiction where it is not
prohibited or unenforceable.

         11.      ARBITRATION.

         Any disputes hereunder which cannot be resolved by negotiations between
the Corporation and the Executive shall be submitted to, and determined by,
arbitration in accordance with the arbitration rules of Jams/Endispute, Inc.,
and the parties agree that arbitration shall be the exclusive method of
resolution of any dispute under this Agreement and agree to be bound by the
final award of the arbitrator in any such proceeding. The arbitrator shall apply
the laws of the State of Maryland. Arbitration may be held in Baltimore,
Maryland or such other place as the parties hereto may mutually agree. Judgment
upon the award by the arbitrator may be entered in any court having jurisdiction
thereof. In reaching its decision, the arbitrator shall have no authority to
change or modify any provision of this Agreement.

         IN WITNESS WHEREOF, the parties have executed and delivered this
Agreement as of the date first above written.

ATTEST:                                CHESAPEAKE BIOLOGICAL LABORATORIES, INC.

/s/ Joyce Carnucci                     By:/s/ John T. Janssen
------------------                        -----------------------
                                       Title:CFO
                                             --------------------

WITNESS:                               EXECUTIVE:

/s/ Joseph G. Wendel                   /s/ Thomas P. Rice
--------------------                   ------------------
Controller                             Thomas P. Rice




                                       56