Document:

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                                                                    EXHIBIT 10.2

                                FIRST AMENDMENT
                                ---------------
                                       TO
                                       --
                               RESEARCH AGREEMENT
                               ------------------
                                      AND
                                      ---
                          TECHNOLOGY TRANSFER AGREEMENT
                          -----------------------------

         This First Amendment to Research Agreement and Technology Transfer
Agreement is made and entered into as of June 23, 2003 by and between GENENCOR
INTERNATIONAL, INC. (together with its Affiliates, "GCOR") and THE PROCTER &
GAMBLE COMPANY (together with its Affiliates, "P&G"), (hereinafter referred to
as "the Parties").

  A.    GCOR and P&G (the "Parties") entered into: (i) a Research Agreement
        effective June 30, 2000 through June 30, 2003 (the "Agreement") with
        respect to the Parties' program of specific research projects and
        certain other matters; and (ii) the Parties simultaneously entered into
        a Technology Transfer Agreement also effective June 30, 2000 through
        June 30, 2003 (the "TTA") with respect to certain intellectual property
        rights and certain other matters all consistent with this Agreement and
        the TTA.

  B.    The Parties desire to extend the date through which both the Agreement
        and TTA between them shall be effective through to and including August
        31, 2003.

         NOW, THEREFORE, in consideration of the mutual undertakings of the
Parties as set forth below as well as other good and valuable consideration, the
receipt and sufficiency of which is hereby acknowledged, GCOR and P&G do hereby
mutually agree as follows:

    1.  With respect to Section 7.A of the Agreement, the first and second
        sentences, the date of "June 30" shall be deleted and replaced with
        "August 31."

    2.  With respect to Section 43 of the TTA, the first sentence, the date of
        "June 30" shall be deleted and replaced with "August 31."

    3.  For the avoidance of doubt, and notwithstanding any other provision
        contained in either the Agreement or the TTA, neither Party shall be
        liable for any additional payments for research and development programs
        or related work during the term of this extension.

    4.  All terms and conditions of the Agreements remain in full force and
        effect as modified hereby and are hereby ratified by the Parties.

    5.  After full execution of this First Amendment to the Agreement and the
        TTA , each shall be deemed to include the modifications herein.

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                                      - 2 -

    6.  This Agreement may be executed in two or more counterparts, but together
        shall constitute two originals, one to be appended to the Agreement and
        the other to the TTA.

           IN WITNESS WHEREOF, the Parties have caused this First Amendment to
  Research Agreement and Technology Transfer Agreement to be executed by and
  through their duly authorized representatives as of the date first above
  written.
<TABLE>
<CAPTION>

GENENCOR INTERNATIONAL, INC.                                  THE PROCTER & GAMBLE COMPANY

200 Meridian Centre Blvd.                                     One Procter & Gamble Plaza
Rochester, New York 14618                                     Cincinnati, Ohio 45202
<S>             <C>                                         <C>         <C>
By:             /s/  Thomas J. Pekich                       By:           /s/ Keith Grime
                -------------------------------------------               -------------------------------------------

Name:           Thomas J. Pekich                            Name:         Keith Grime
                -------------------------------------------               -------------------------------------------

Title:          Group Vice President                        Title:        Vice President,
                Bioproducts                                               Research & Development
                -------------------------------------------               -------------------------------------------

Date:           June 30, 2003                               Date:         6/30/03
                -------------------------------------------               -------------------------------------------

</Table><PAGE>

                                                                    Exhibit 10.1

                                                                  March 14, 2003

Alan F. McIlroy
9668 Preserve Place
Centerville, OH  45458

Dear Alan:

This letter (this "Letter Agreement") will acknowledge our agreement and
understanding with respect to certain modifications to the terms of your
employment.

The Employment Agreement effective as of June 16, 2000, and amended by a letter
agreement dated May 13, 2002 (collectively, the "Employment Agreement") by and
between you and Dayton Superior Corporation (the "Company", "we", "us") contains
certain provisions regarding the termination of your employment from the Company
and your severance payments. We hereby agree to modify those terms as follows:

1.       The provisions of your Employment Agreement shall remain in effect
except to the extent modified by this Letter Agreement. To the extent that there
is any inconsistency between this Letter Agreement and the Employment Agreement,
this Letter Agreement shall apply.

2.       The capitalized terms in this Letter Agreement shall have the same
meaning as the defined terms in the Employment Agreement, unless otherwise
specifically indicated in this Letter Agreement.

3.       Except as provided otherwise in this Letter Agreement, you shall remain
employed by the Company in your current position until the Company's CEO informs
you that your services are no longer needed as of a particular date, in which
case your employment will terminate on that particular date (your "Termination
Date"). If you resign from or otherwise terminate your employment with the
Company prior to the Termination Date, you will not be entitled to any severance
benefits, bonus payments or Additional Severance Amounts as described in this
Letter Agreement.

4.       During the remainder of the term of your employment with the Company,
you will exercise the same degree of care and diligence in performing your job
with the Company as you have prior to signing this Letter Agreement. The Company
shall retain the right to terminate you for Cause as set forth in the Employment
Agreement. If you are terminated for Cause, you shall not be entitled to any
severance benefits.

5.       The "Severance Period" shall be the time from the Termination Date
until 24 months after that date. Provided that you comply with the terms of this
Letter Agreement, during the

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Alan F. McIlroy
March 14, 2003
Page 2

Severance Period you will receive continued payment of your Annual Base Salary
in effect on the Termination Date (your "Severance Pay") in accordance with the
Company's regular payroll practice. We will also continue for the Severance
Period your car allowance in effect on the Termination Date and the coverage
currently available under the Company medical and dental plans (or, if the
Company amends, replaces or terminates any such plans or programs following your
Termination Date, the Company medical and dental plans provided to employees
similarly situated to you), as if you were an active employee during such time,
subject to standard employee contributions by you as are required under such
plans, and further subject to your election of "COBRA" continuation coverage
during this period. All post-employment coverage under such plans shall be
provided prior to the start of COBRA continuation coverage required by federal
(and where applicable state) law. Your medical and dental coverage under these
plans shall cease when you become eligible for coverage under another employer's
plans during the Severance Period. Your car allowance shall cease if you begin
employment with another employer during the Severance Period. If you obtain
employment with another company during the Severance Period, you shall
immediately notify us. Other than your Severance Pay, and other benefits
expressly described as continuing in this Letter Agreement, all benefits
described in the Employment Agreement shall cease upon the start of your
employment with another employer. If you perform work as a consultant during the
Severance Period, you will be deemed to have accepted employment with another
employer if you earn more than $100,000 as a consultant in any 12 month period.

6.       As an additional amount for your severance pay, on July 15, 2003, or
two weeks after your Termination Date, whichever is later, the Company will pay
you $207,000 (the "Additional Severance Amount") from which all required
government withholdings will be made. You agree that on the date that you
receive the Additional Severance Amount, you will pay a minimum of 54% of the
Additional Severance Amount to the Company to reduce the amount of your
outstanding loans with the Company. You also agree that if you fail to make this
payment to reduce the amount of your loans with the Company, the Company may
cease making Severance Payments to you as provided in paragraph 5 of this Letter
Agreement.

7.       Unless you are terminated for Cause, you shall be entitled to a bonus
for 2003 in the amount of $45,000, prorated by days for your time with the
Company in calendar year 2003. You will not be entitled to any other bonus for
your work with the Company in 2003 under the Company's executive annual bonus
plan or any other plan. This bonus payment will be made to you within two weeks
after your Termination Date.

8.       You agree to waive your rights to all stock options you have or have
had with the Company, whether vested or not, and whether incentive stock
options, non-qualified stock options, roll-over stock options, or any other form
of stock option. You agree that as of the

<PAGE>

Alan F. McIlroy
March 14, 2003
Page 3

date of this Letter Agreement, you no longer possess any right to any such
options, or any right to receive any such options.

9.       On the Termination Date, you will return all Company property to the
Company, as well as all information set forth in paragraph 10 of the June 16,
2000 Employment Agreement.

10.      In the event of your Death or Disability during the remaining term of
your employment, the Death and Disability provisions contained in your
Employment Agreement shall remain in effect. You shall not be entitled to Death
or Disability benefits after the Termination Date.

11.      As further consideration for the execution of this Letter Agreement,
the Company will pay to a qualified executive outplacement vender of its choice,
reasonable and customary fees and expenses for outplacement services for you for
a maximum of one year (or until you obtain new employment, whichever comes
sooner), provided that those expenses are approved by the Company's CEO in
advance.

12.      We agree that the noncompetition provisions contained in Section 9 of
the June 16, 2000 Employment Agreement shall remain in full force and effect,
and the parties agree that the duration of the non-competition period shall be
two years from the Termination Date.

13.      You agree that this Letter Agreement and the terms thereof and all
negotiations and discussions resulting in or relating to this Letter Agreement
shall remain strictly confidential and shall not be disclosed by you or your
counsel to any other person or entity, including without limitation, the media,
and current or former employees of the Company, except (1) to your immediate
family members, (2) as needed to comply with federal, state, and local tax laws,
and (3) as required by subpoena or other legal process after notice to the
Company. It shall not be a violation of this paragraph 13 for you to disclose to
recruiters or prospective employers that you have a severance agreement with the
Company as long as the specific details are not disclosed.

14.      In exchange for the payments promised in this Letter Agreement and
other good and valuable consideration, the sufficiency of which is hereby
acknowledged, with the exception of any rights you may have under the Company's
D&O policies, you hereby RELEASE, REMISE AND FOREVER DISCHARGE the Company, its
subsidiaries, divisions, affiliated companies, predecessors, successors and
assigns, as well as its shareholders, directors, officers, administrators,
agents, and employees, personally and in their respective capacities, and any
other person or entity representing or succeeding to any such person or entity,
from any and all claims, demands, rights, charges, grievances, actions,
interests, debts, liabilities, damages, costs and expenses, or causes of action
of whatever type or nature, whether legal or

<PAGE>

Alan F. McIlroy
March 14, 2003
Page 4

equitable, whether in tort or in contract, whether known or unknown to you,
which you may now have against them, either individually, jointly, or severally,
before any municipal, state or federal court or governmental or administrative
agency, based upon acts which have occurred from the beginning of time to the
date of this Letter Agreement, and especially from any and all claims, demands,
or causes of action arising out of, either directly or indirectly, your
employment by or separation from the Company, including, but not limited to, any
rights or causes of action you may have under Title VII of the Civil Rights Act
of 1964, as amended, 42 U.S.C. Section 2000e, et seq., the Americans with
Disability Act, 42 U.S.C. Section 12101 et seq., the Family and Medical Leave
Act, 29 U.S.C. Section 2601 et seq., the Age Discrimination in Employment Act,
29 U.S.C. Section 621, et seq., the Employee Retirement Income Security Act
("ERISA"), 29 U.S.C. Sections 1001 et seq., the Rehabilitation Act of 1973, 29
U.S.C. Sections 701 et seq., the Reconstruction Era Civil Rights Act as amended,
42 U.S.C. Sections 1981 et seq. and Ohio Revised Code Sections 4112.01, et seq.,
the "Ohio Whistleblower Statute" Sections 4113.52 et seq., and common law tort,
including any claim for or right to attorney's fees, costs and expenses
thereunder.

15.      You represent and warrant that you have not heretofore assigned or
transferred any of the claims, demands, charges and causes of action released
and discharged by this Letter Agreement. You agree to indemnify and hold the
Company harmless from any damages of expenses, including attorney's fees, that
it may incur as a result of any breach of the foregoing representation and
warranty.

16.      This Letter Agreement shall be binding upon, inure to the benefit of,
and be enforceable by and against the respective heirs, legal representatives,
successors and assigns of the parties to this Letter Agreement.

17.      No failure by any party to insist upon strict compliance with any term
of this Letter Agreement, to exercise any option, enforce any right, or seek any
remedy upon any default of the other shall affect, or constitute a waiver of,
the first party's right to insist upon such strict compliance, exercise that
option, enforce that right, or seek that remedy with respect to that default or
any prior, contemporaneous, or subsequent default. No custom or practice of the
parties at variance with any provision of this Letter Agreement shall affect, or
constitute a waiver of, any party's right to demand strict compliance with all
provisions of this Letter Agreement.

18.      It is the intention of the parties to this Letter Agreement that all
questions concerning the intention, validity, or meaning of this Letter
Agreement shall be construed and resolved according to the laws of the State of
Ohio.

<PAGE>

Alan F. McIlroy
March 14, 2003
Page 5

19.      If and to the extent that any of the parties breach part or all of any
provision of this Letter Agreement, such alleged breach shall not affect the
remaining provisions of this Letter Agreement, which shall remain in full force
and effect. Similarly, if, and to the extent that, any court of competent
jurisdiction holds that part or all of any provision of this Letter Agreement is
invalid, such invalidity shall not affect the balance of that provision or the
remaining provisions of this Letter Agreement, which shall remain in full force
and effect.

20.      You acknowledge that you have specifically waived any and all rights
under 29 U.S.C. Section 621 et seq. and all provisions of the Older Worker
Benefit Protection Act have been complied with, including that this Letter
Agreement has been explained to you. You acknowledge that you have been advised
in writing to consult with your attorneys regarding whether you wish to execute
this Letter Agreement. You further acknowledge that you have consulted with your
attorneys regarding the meaning of this Letter Agreement; that you have been
given a period of twenty-one (21) days within which to consider this Letter
Agreement; and that you hereby voluntarily and knowingly waive such twenty-one
(21) day period. You understand that you may revoke this Letter Agreement within
seven (7) days from the date on which you sign it by giving hand-delivered
written notice of such revocation to the Company within such seven (7) day
revocation period. This Letter Agreement shall not be effective for seven (7)
days after the date on which you sign it, but unless so revoked shall
automatically become effective. Finally, you acknowledge that this Letter
Agreement has been voluntarily entered into by you and shall be binding on your
guardians, heirs, assigns, executors, administrators, and other personal
representatives.

In consideration of the foregoing agreements and other good and valuable
consideration, the receipt and sufficiency of which is hereby acknowledged, you
and the Company agree to the foregoing terms and conditions set forth in this
Letter Agreement. Please indicate your agreement with and acceptance of the
terms and conditions set forth in this letter by signing below and returning a
copy of this letter to us as your earliest convenience. If you have any
questions, please feel free to call Peter Hardin-Levine at 216.861.7909.

Very truly yours,

Dayton Superior Corporation

By: /s/ John A. Ciccarelli
    -------------------------------
    John A. Ciccarelli
    Chairman of the Board

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Alan F. McIlroy
March 14, 2003
Page 6

By: /s/ Stephen R. Morrey
    -------------------------------
    Stephen R. Morrey
    President and Chief Executive Officer

Agreed and accepted:

    /s/ Alan F. McIlroy
-----------------------------------
Alan F. McIlroy

Residence Address:  9668 Preserve Place
                    Centerville, OH  45458

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