Document:

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                                                                 EXHIBIT 10.22

                                 AMENDMENT NO. 1

                                     TO THE

                         EXECUTIVE EMPLOYMENT AGREEMENT

       THIS AMENDMENT NUMBER 1 (the "AMENDMENT") TO THE EXECUTIVE EMPLOYMENT
AGREEMENT dated as of January 1, 2000 (the "AGREEMENT") is made as of December
28, 2000, between Cysive, Inc., a Delaware corporation (the "COMPANY"), and
Nelson A. Carbonell, Jr. ("EXECUTIVE").

       WHEREAS, in connection with the Company's annual review of Executive
performance and market conditions governing Executive compensation, the Company
and the Executive hereby agree to amend the Agreement to designate Executive's
compensation for calendar year 2001.

       NOW, THEREFORE, for good and valuable consideration, the receipt and
sufficiency of which is hereby acknowledged, the Executive and the Company
hereby agree as follows.

              1.     SECTION 1(b) of the Agreement is hereby deleted and
replaced with the following:

                     "(b)   SALARY, BONUS AND BENEFITS. For the calendar year
       2001, the Company will pay Executive a base salary of $195,000 per annum
       (the "ANNUAL BASE SALARY"). During 2001, Executive shall receive the Base
       Bonus when and if the Company achieves certain performance targets, and,
       additionally, Executive may also receive an Accelerated Bonus if and when
       the Company exceeds those certain performance targets, subject to the
       discretion of the Compensation Committee (the "BONUS"). The Base Bonus
       means an amount equal to the product of 1.5 multiplied by the Annual Base
       Salary and Accelerated Bonus means an additional amount as determined by
       the Compensation Committee. The Executive shall be eligible to
       participate in the Company's split-dollar insurance policy in accordance
       with SECTION 1(c) BELOW. Executive's Annual Base Salary and Bonus for any
       part of 2001 will be prorated based upon the number of days elapsed in
       such year. In addition, during the Employment Period, Executive will be
       entitled to such other benefits approved by the Compensation Committee
       and made available to the Company's senior executives, including, but not
       limited to, vacation time, tuition reimbursement, reimbursement of
       business expenses and healthcare benefits."

              2.     SECTION 1(d) of the Agreement is hereby deleted and
replaced with the following:

              "(d)   SEPARATION. Executive's employment by the Company during
the Employment Period will continue until Executive's resignation at any time or
until

                                      -1-
<PAGE>   2

Executive's disability or death or until the Compensation Committee terminates
Executive's Employment at any time during the Employment Period (the
"Separation"). If the Employment Period is terminated by the Executive without
Good Reason, then the termination will be effective fifteen (15) days after the
date of delivery of written notice of termination. If the Employment Period is
terminated by the Board or the Chief Executive Officer without Cause or by the
Executive with Good Reason, then the termination will be effective fifteen (15)
days after the date of delivery of written notice of termination. If the
Employment Period is terminated by the Board or the Chief Executive Officer with
Cause, termination will be effective fifteen (15) days after the date of
delivery of written notice of termination. If the Employment Period is
terminated by the Board or the Chief Executive Officer with Cause or by the
Executive without Good Reason, then the Executive shall be entitled to receive
his Annual Base Salary and all fringe benefits only through the effective date
of termination. If the Employment Period is terminated by the Board or the Chief
Executive Officer without Cause or by the Executive with Good Reason, then the
Executive shall be entitled to receive an amount equal to his Annual Base Salary
plus the Base Bonus (in effect at the time of termination) and all fringe
benefits (such payments and fringe benefits are referred hereinafter as the
"SEVERANCE PAYMENT") payable over a one year period in accordance with normal
payroll practices. If the Employment Period is terminated due to death, then the
Annual Base Salary and medical insurance will be continued through the next full
calendar month following the month in which the Executive died. If the
Employment Period is terminated due to Disability (as defined herein), then the
Annual Base Salary, medical insurance and disability insurance will be continued
until the last day of the six-month period following the Disability; provided,
however, that such Annual Base Salary shall be reduced by the amount of any
disability income payments made to the Executive during such six-month period
from any insurance or other policies provided by the Company. In the event
Executive is owed amounts under this SECTION 1(d), such amounts may be withheld
by the Company upon a breach or threatened breach of the terms and conditions of
SECTION 3 below.

              3.     SECTION 5 of the Agreement is hereby deleted and replaced
with the following:

                     "5. NOTICES. Any notice provided for in this Agreement must
       be in writing and must be either personally delivered, mailed by first
       class mail (postage prepaid and return receipt requested) or sent by
       reputable overnight courier service (charges prepaid) to the recipient at
       the address below indicated:

                               If to the Company:

                               Cysive, Inc.
                               10780 Parkridge Blvd.
                               Suite 400
                               Reston, Virginia 20191
                               Attention:   Nelson A. Carbonell, Jr. and
                                            Joseph M. Boyle

                                      -2-
<PAGE>   3

                                    If to the Executive:

                               Nelson A. Carbonell, Jr.
                               Cysive, Inc.
                               10780 Parkridge Blvd.
                               Suite 400
                               Reston, Virginia 20191

         or such other address or to the attention of such other person as the
         recipient party shall have specified by prior written notice to the
         sending party. Any notice under this Agreement will be deemed to have
         been given when so delivered or sent or, if mailed, five days after
         deposit in the U.S. mail."

         IN WITNESS WHEREOF, the parties hereto have executed this Executive
Employment Agreement on the date first written above.

                                    CYSIVE, INC.

                                    By:       /s/ JOHN R. LUND
                                             ---------------------------------
                                             Name:    John R. Lund
                                             Title:   Vice President, Chief
                                                      Financial Officer,
                                                      Treasurer and Secretary

                                    EXECUTIVE

                                     /s/ NELSON A. CARBONELL, JR.
                                    ------------------------------------------
                                    Nelson A. Carbonell, Jr.<PAGE>   1
                                                                 EXHIBIT 10.23

                                 AMENDMENT NO. 1

                                     TO THE

                         EXECUTIVE EMPLOYMENT AGREEMENT

       THIS AMENDMENT NUMBER 1 (the "AMENDMENT") TO THE EXECUTIVE EMPLOYMENT
AGREEMENT dated as of January 1, 2000 (the "AGREEMENT") is made as of December
28, 2000, between Cysive, Inc., a Delaware corporation (the "COMPANY"), and John
R. Lund ("EXECUTIVE").

       WHEREAS, in connection with the Company's annual review of Executive
performance and market conditions governing Executive compensation, the Company
and the Executive hereby agree to amend the Agreement to designate Executive's
compensation for calendar year 2001.

       NOW, THEREFORE, for good and valuable consideration, the receipt and
sufficiency of which is hereby acknowledged, the Executive and the Company
hereby agree as follows.

            1.  SECTION 1(b) of the Agreement is hereby deleted and replaced
with the following:

                "(b) SALARY, BONUS AND BENEFITS. For the calendar year 2001, the
        Company will pay Executive a base salary of $160,000 per annum (the
        "ANNUAL BASE SALARY"). During 2001, Executive shall receive the Base
        Bonus when and if the Company achieves certain performance targets, and,
        additionally, Executive may also receive an Accelerated Bonus if and
        when the Company exceeds those certain performance targets, subject to
        the discretion of the Chief Executive Officer (the "BONUS"). The Base
        Bonus means an amount equal to the product of 0.15 multiplied by the
        Annual Base Salary and Accelerated Bonus means an additional amount as
        determined by the Chief Executive Officer. The Executive shall be
        eligible to participate in the Company's split-dollar insurance policy
        in accordance with SECTION 1(c) BELOW. Executive's Annual Base Salary
        and Bonus for any part of 2001 will be prorated based upon the number of
        days elapsed in such year. In addition, during the Employment Period,
        Executive will be entitled to such other benefits approved by the Chief
        Executive Officer and made available to the Company's senior executives,
        including, but not limited to, vacation time, tuition reimbursement,
        reimbursement of business expenses and healthcare benefits."

            2. SECTION 1(d) of the Agreement is hereby deleted and replaced
with the following:

            "(d) SEPARATION. Executive's employment by the Company during the
        Employment Period will continue until Executive's resignation at any
        time or until Executive's disability or death or until the Chief
        Executive Officer terminates Executive's Employment at any time during
        the Employment Period (the "SEPARATION"). If the Employment Period is
        terminated by the Executive without Good Reason, then the termination
        will be effective fifteen

                                      -1-
<PAGE>   2

(15) days after the date of delivery of written notice of termination. If the
Employment Period is terminated by the Board or the Chief Executive Officer
without Cause or by the Executive with Good Reason, then the termination will
be effective fifteen (15) days after the date of delivery of written notice of
termination. If the Employment Period is terminated by the Board or the Chief
Executive Officer with Cause, termination will be effective fifteen (15) days
after the date of delivery of written notice of termination. If the Employment
Period is terminated by the Board or the Chief Executive Officer with Cause or
by the Executive without Good Reason, then the Executive shall be entitled to
receive his Annual Base Salary and all fringe benefits only through the
effective date of termination. If the Employment Period is terminated by the
Board or the Chief Executive Officer without Cause or by the Executive with
Good Reason, then the Executive shall be entitled to receive an amount equal to
his Annual Base Salary plus the Base Bonus (in effect at the time of
termination) and all fringe benefits (such payments and fringe benefits are
referred hereinafter as the "SEVERANCE PAYMENT") payable over a one year
period in accordance with normal payroll practices. If the Employment Period is
terminated due to death, then the Annual Base Salary and medical insurance will
be continued through the next full calendar month following the month in which
the Executive died. If the Employment Period is terminated due to Disability
(as defined herein), then the Annual Base Salary, medical insurance and
disability insurance will be continued until the last day of the six-month
period following the Disability; provided, however, that such Annual Base
Salary shall be reduced by the amount of any disability income payments made to
the Executive during such six-month period from any insurance or other policies
provided by the Company. In the event Executive is owed amounts under this
SECTION 1(d), such amounts may be withheld by the Company upon a breach or
threatened breach of the terms and conditions of SECTION 3 below.

            3.   SECTION 5 of the Agreement is hereby deleted and replaced
with the following:

                 "5. NOTICES. Any notice provided for in this Agreement must be
        in writing and must be either personally delivered, mailed by first
        class mail (postage prepaid and return receipt requested) or sent by
        reputable overnight courier service (charges prepaid) to the recipient
        at the address below indicated:

                         If to the Company:

                         Cysive, Inc.
                         10780 Parkridge Blvd.
                         Suite 400
                         Reston, Virginia 20191
                         Attention: Nelson A. Carbonell, Jr. and Joseph M. Boyle

                            If to the Executive:

                         John R. Lund
                         Cysive, Inc.

                                      -2-
<PAGE>   3

                          10780 Parkridge Blvd.
                          Suite 400
                          Reston, Virginia 20191

        or such other address or to the attention of such other person as the
        recipient party shall have specified by prior written notice to the
        sending party. Any notice under this Agreement will be deemed to have
        been given when so delivered or sent or, if mailed, five days after
        deposit in the U.S. mail."

        IN WITNESS WHEREOF, the parties hereto have executed this Executive
Employment Agreement on the date first written above.

                                         CYSIVE, INC.

                                         By: /s/ NELSON A. CARBONELL, JR.
                                            ---------------------------------
                                             Name:  Nelson A. Carbonell, Jr.
                                             Title: Chairman, President and
                                                    Chief Executive Officer

                                         EXECUTIVE

                                         /s/ JOHN R. LUND
                                         -----------------------------------
                                         John R. Lund

                                      -3-

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