Document:

<PAGE>

                                                                   Exhibit 10.18
                                                                   -------------

         Confidential materials omitted and filed separately with the
                      Securities and Exchange Commission.
                          Asterisks denote omissions.

Microsoft Corporation   Tel 425 882 8080
One Microsoft Way       Fax 425 936 7329
Redmond, WA 98052-6399  http://www.microsoft.com/

June 1, 1999

Brian Vaccaro
Prodigy Communications Corporation
44 S. Broadway
White Plains, NY  10601

                   RENEWAL OF AND AMENDMENT TO THAT CERTAIN
         MICROSOFT WINDOWS 98 "GET CONNECTED" CO-MARKETING AGREEMENT,
 AGREEMENT #1711CU-8230A, AGREEMENT EFFECTIVE DATE JULY 2, 1998 ("AGREEMENT")

Dear Mr. Vaccaro:

The purpose of this letter ("Amendment") is to renew the Agreement for an
additional term of one (1) calendar year from the original Agreement Effective
Date, subject to the following amendments:

1.  A new Section 1.22 is added, to read as follows:

ISP Service Offer shall mean an offer of ISP Services maintained on any COMPANY
-------------------------------------------------------------------------------
Sign-up Server(s) that set forth COMPANY Information.
-----------------------------------------------------

2.  Section 3.3 is restated in its entirety, to read as follows (new text
    appears in double underline):

       COMPANY shall develop and maintain a Sign-up Server.  The Sign-up Server
       shall be operational on a 7X24 basis.  Recognizing the importance of
       convenient and high-qualify service in order to meet the objectives of
       this Agreement, the parties agree that COMPANY's Sign-up Server [**] with
       the [**] of other [**].  COMPANY shall [**] of its [**].  Specifically,
                                ----------------------------------------------
       but without limitation, in order to comply with the preceding sentence,
       -----------------------------------------------------------------------
       COMPANY (a) shall [**] on the [**] and (b) shall [**] in the event [**].
       ------------------------------------------------------------------------

All capitalized terms used but not defined herein shall have the meanings
ascribed to them in the Agreement.  The terms of this Amendment shall supersede
any inconsistent terms contained in the Agreement.

Please sign both originals of the letter and return them to your Account Manager
who will arrange for their execution on behalf of Microsoft and return one
original to you.  Please contact your Account Manager if you have any questions.
<PAGE>

By signing below the parties indicate their agreement with the above terms.  All
signed copies of this Amendment shall be deemed originals.  This Amendment is
executed only in the English language.

AGREED:                                AGREED:

MICROSOFT CORPORATION

/s/ Mark Chestnut                      /s/ Andrea Hirsch
--------------------------------       --------------------------------
By: Mark Chestnut                      By: Andrea Hirsch

Mark Chestnut                          Andrea Hirsch
--------------------------------       --------------------------------
Name (Printed)                         Name (Printed)

Director, ISP
Network Solutions Group                EVP General Counsel
--------------------------------       --------------------------------
Title                                  Title

1/28/00                                January 19, 2000
--------------------------------       --------------------------------
Date                                   Date

cc:  James Huse
     Microsoft LCA Files
     Microsoft OEM Finance<PAGE>

                                                                   Exhibit 10.19

                         Amendment #3 to that certain
                   Renewal of and Amendment to that certain
          MICROSOFT WINDOWS 98 "GET CONNECTED" CO-MARKETING AGREEMENT,
 Agreement #1711CU-8230A, Agreement Effective Date July 2, 1998 ("Agreement")

        The purposes of this Amendment is to amend the Agreement to expand it to
include the Internet Connection Wizard for Microsoft Windows 20000 software.

        1. All references in the Agreement to Microsoft Windows 98 software
whether the reference is to "Microsoft Windows 98", "Windows 98" or "Win98" are
hereby deemed to include Microsoft Windows 2000 software in addition to
Microsoft Windows 98 software.

        2. Exhibit C (Quarterly Referral Fee Report) is hereby amended to be in
the form attached hereto.

        All capitalized terms used but not defined shall have the meanings
ascribed to them in the Agreement. The terms of this Amendment shall supersede
any inconsistent terms contained in the Agreement.

        Please sign both originals of this Amendment and return them to your
Account Manager who will arrange for their execution on behalf of Microsoft and
return one original to you. Please contact your Account Manager if you have any
questions.

        By signing below the parties indicate their agreement with the above
terms. All signed copies of this Amendment shall be deemed originals. This
Amendment is executed only in the English language.

AGREED:                                 AGREED:

MICROSOFT CORPORATION

/s/ Mark Chestnut                       /s/ Andrea Hirsch
-----------------------------           -----------------------------
By: Mark Chestnut                       By: Andrea Hirsch

Mark Chestnut                           Andrea Hirsch
-----------------------------           -----------------------------
Name (Printed)                          Name (Printed)
Director, ISP
Network Solutions Group                 EVP General Counsel
------------------------------          ------------------------------
Title                                   Title

      2/22/00                           January 19, 2000
------------------------------          ------------------------------
Date                                    Date<PAGE>

                                                                   EXHIBIT 10.29

                                               February 28, 2000

PricewaterhouseCoopers LLP
1301 Avenue of the Americas
New York, New York  10019

Ladies and Gentlemen:

At December 31, 1999, current liabilities of Prodigy Communications Corporation
("Prodigy") exceeded current assets by $117.8 million.  Included in this amount
are loans payable to Banco Inbursa, S.A. which were arranged under the auspices
of Carso Global Telecom in the amount of $110.2 million.

This letter serves to confirm the following:

1.  Telefonos de Mexico, S.A. de C.V. or any of its subsidiaries (TELMEX) will
    provide additional funding up to $200.0 million, either through capital
    and/or debt financing, to allow Prodigy to continue as a going concern for
    one year from the date of this letter.

2.  TELMEX has available capital and/or debt financing facilities necessary to
    support Prodigy's funding requirements for one year from the date of this
    letter.

Sincerely,

/s/ Adolfo Cerezo

Adolfo Cerezo
Chief Financial Officer<PAGE>

                                                                   Exhibit 10.13

                              EMPLOYMENT AGREEMENT

     This EMPLOYMENT AGREEMENT ("Agreement"), is entered into by and between
Cambridge Technology Partners (Massachusetts), Inc., a Delaware corporation
("CTP"), and Jack L. Messman ("Messman" or "Employee").

                              W I T N E S S E T H :

     WHEREAS, CTP and Messman wish to enter into an employment relationship in
which CTP employs Messman as its President and Chief Executive Officer;

     NOW, THEREFORE, in consideration of the mutual promises contained herein
and intending to be legally bound, CTP and Messman hereby AGREE as follows:

          1. Employment. CTP hereby employs Messman as its President and Chief
     Executive Officer and Messman hereby accepts such employment upon the terms
     and conditions set forth below.

          2. Term. The term of Messman's employment shall be one year beginning
     on July 19, 1999, as further extended or unless sooner terminated in
     accordance with the other provisions of this Agreement ("Term"). On the
     first anniversary of Messman's employment and on each subsequent such
     anniversary, the Term shall automatically extend for one year, unless
     either party shall have given to the other party written notice of
     termination of this Agreement at least 30 days before such anniversary,
     which notice shall effect the termination of Messman's employment upon the
     expiration of the Term and any extensions thereto.

          3. Office and Duties.

               (a) During the Term and subject to the other provisions of this
          Agreement, Messman shall serve as President and Chief Executive
          Officer of CTP and, subject to any restrictions set forth in the
          Shareholders' Agreement or in the Bylaws of CTP, Messman shall perform
          such duties as are customary for a President and Chief Executive
          Officer and such other duties as may from time to time be assigned to
          him by the Board of Directors of CTP.

               (b) During the Term hereof, Messman shall use his best efforts to
          carry out his duties and responsibilities hereunder and devote his
          entire working time to the business and affairs of CTP and shall not,
          in any advisory or other capacity, work for any other individual, firm
          or corporation without first having obtained the written consent of
          the Board of Directors of CTP, which consent shall not be unreasonably
          withheld. Notwithstanding the foregoing, the Board of Directors of CTP
          acknowledge that Messman currently is a director of Safeguard, Novell,
          USData, Tandy and Metallurg and no consent is required with respect to
          those directorships.
<PAGE>

               (c) During the Term hereof, the principal place of employment of
          Messman shall be CTP's headquarters in Cambridge, Massachusetts or
          such other locations as may be selected for CTP's facilities, although
          it is understood that in connection with his duties under this
          agreement, Messman will be required to travel to and perform services
          at other locations.

               (d) Messman represents and warrants that he is not subject to any
          agreement, covenant, understanding or restriction, including without
          limitation any non-competition agreement, that would prohibit him from
          executing and performing fully his duties and responsibilities under
          this Agreement.

               (e) Messman agrees to cooperate at the request of CTP in any
          efforts to obtain "key-man" life insurance on his life.

          4. Compensation. As compensation for the services to be rendered
     hereunder by Employee, CTP agrees to pay or provide to Messman:

               (a) Salary. A basic salary (the "Base Salary") for such services
          at the annual rate of $650,000, payable in periodic installments in
          accordance with CTP's regular payroll practices in effect from time to
          time. This rate of compensation shall be reviewed by the Board of
          Directors at least once per fiscal year and may be increased at the
          discretion of the Board of Directors of CTP, but not reduced, during
          the Term hereof.

               (b) Bonus. An annual bonus payable after the end of each fiscal
          year commencing with the end of 1999, based upon the Employee's
          performance during such fiscal year. At the discretion of the Board of
          Directors, the Employee may receive an annual bonus equal to 100% of
          his annual base salary for above-average performance and up to 200% of
          his annual base salary for exceptional performance. The amount of this
          annual bonus may be reviewed and adjusted by the Board of Directors
          from year to year.

               (c) Options.

                    (i) On August 27, 1999, CTP granted to Messman options to
               purchase, at an exercise price of $14.438 per share, the reported
               closing price of CTP's common stock on the Nasdaq National Market
               system on August 26, 1999, an aggregate of 1,200,000 shares of
               common stock of CTP, in accordance with and subject to CTP's
               applicable Stock Option Plan as amended from time to time and the
               terms and conditions set forth in the applicable Option Agreement
               between CTP and Messman, as follows:

                         (A) Options to purchase 27,704 shares under CTP's 1991
                    Stock Option Plan pursuant to CTP's Executive Incentive
                    Stock Option Agreement with Messman;

                         (B) Options to purchase 572,296 shares under CTP's 1991
                    Stock Option Plan pursuant to CTP's Executive Non-Qualified
                    Option Agreement with Messman; and

                                       2
<PAGE>

                    (C) Options to purchase 600,000 shares under CTP's 1998
               Stock Option Plan pursuant to CTP's Executive Non-Qualified
               Option Agreement with Messman.

          Each applicable Option Agreement is attached hereto and incorporated
          herein and a copy of CTP's Special Option Plan has been provided to
          Messman.

               (ii) On August 27, 1999, CTP shall grant to Employee 300,000
          restricted shares of CTP's common stock, which shall vest according to
          the schedule set forth in the restricted stock grant agreement which
          is attached hereto and incorporated herein.

               (iii) CTP may grant to Employee additional annual options at the
          discretion of the Management Resource Committee.

               (d) Medical. CTP shall obtain immediately medical and health
          insurance coverage for Messman and his spouse and unemancipated
          children, similar to medical and health benefits provided to CTP's
          other executive employees. Medical insurance coverage will be reviewed
          from time to time and adjusted at the discretion of the Board of
          Directors to maintain such coverage at levels commensurate with the
          size and financial condition of CTP.

               (e) Life Insurance. CTP will purchase term life insurance in an
          amount that is commensurate to that which is provided to other senior
          executives of CTP.

               (f) Other Benefits. Nothing contained herein shall be deemed to
          limit or affect the right of Messman to receive other forms of
          compensation or to participate in any retirement, disability, profit
          sharing, stock option, cash or stock bonus or other plan or
          arrangement, or in any other benefits now or hereafter provided by CTP
          for its employees or executives at the sole discretion of the Board of
          Directors of CTP.

               (g) Business Expenses. CPT shall reimburse Employee for all
          reasonable expenses incurred by him in connection with the performance
          of his duties hereunder subject to Employee's timely submission of
          appropriate documentation in accordance with its regular reimbursement
          policies in effect from time to time.

               (h) Vacation. Messman shall be entitled to a paid vacation (taken
          consecutively or in segments) of six weeks during each fiscal year,
          adjusted pro rata for any partial fiscal year during the Term hereof.
          Such vacation may be taken at such times as is reasonably consistent
          with proper performance by Messman of his duties and responsibilities
          hereunder.

               (i) Relocation Expenses. CTP will reimburse Messman for his
          reasonable costs incurred in connection with his relocation from Ft.
          Worth, Texas to the Cambridge, Massachusetts area to commence
          employment hereunder, including the following:

                                       3
<PAGE>

                    (i) The cost of packing, shipping, storage of and unpacking
               the household belongings of Messman and his immediate family from
               Ft. Worth, Texas to the Cambridge, Massachusetts area;

                    (ii) The difference between the unadjusted price at which
               Messman sells his Ft. Worth residence and the unadjusted price at
               which he purchased the Ft. Worth residence, if such sale price
               does not exceed such purchase price; and

                    (iii) Non-recoverable transaction costs of purchasing a home
               in the Cambridge area including only the following: home
               inspection fee, transfer tax and other closing costs.

     All reimbursements made hereunder shall be contingent upon Messman's prior
submission to CTP's of supporting receipts, invoices or other similar
documentation.

     Since Messman's Ft. Worth residence was unsold on the closing date for his
purchase of a residence in the Cambridge area, CTP shall grant him an
interest-free loan in the amount of his equity in his Ft. Worth residence, the
proceeds of which shall be applied in their entirety to the purchase price of a
residence in the Cambridge area, and which loan shall be repaid in its entirety
from the proceeds of the sale of the Ft. Worth residence.

          5. Death and Disability.

               (i) The Term of employment of Messman shall terminate upon the
          death of Messman, or, at the option of CTP, in the event of physical
          or mental incapacity or disability that renders him unable, with
          reasonable accommodation, to perform the essential duties required of
          him under this Agreement ("Disability") for a period of 90 consecutive
          days or for one hundred eighty (180) days or more during any period of
          twelve (12) consecutive months. Such Disability shall be subject to
          verification by a qualified physician if requested by Messman or his
          duly appointed representative. During any period of Disability prior
          to termination, Messman shall continue to be compensated as provided
          herein (less any payments due Messman under disability benefit
          programs paid for by CTP, including without limitation Social Security
          disability, worker's compensation and disability or retirement
          benefits).

               (ii) In the event of the death of Messman during the period of
          employment or in the event of the termination of this Agreement by CTP
          because of the Disability of Messman, Messman shall be entitled to
          receive the compensation specified in Paragraphs 4(a), 4(b) and 4(g)
          earned by Messman through the date of death or termination and the
          restricted shares granted under Paragraph 4(c)(ii) shall automatically
          be fully vested. CTP thereafter shall have no further obligations
          under this Agreement except for its obligations to pay any vested
          Messman benefits referred to in Paragraph 4 hereof.

                                       4
<PAGE>

          6. Termination of Employment.

               (a) CTP may terminate this Agreement with cause immediately upon
          written notice to Messman. "Termination for cause" shall mean
          discharge by CTP on the following grounds:

                    (i) Messman's plea or conviction in a court of law of any
               crime or offense, which plea or conviction, as determined by the
               Board of Directors in its sole discretion, makes him unfit for
               continuing employment, prevents him from effective management of
               CTP or materially adversely affects the reputation or business
               activities of CTP.

                    (ii) Dishonesty or willful misconduct that, as determined by
               the Board of Directors, materially, adversely affects the
               reputation or business activities of CTP.

                    (iii) Substance abuse, including the possession or use of
               illegal drugs or the abuse of legal drugs or alcohol or being
               under the influence of drugs or alcohol in the workplace or
               during the course of his duties.

                    (iv) Misappropriation of funds or other property.

                    (v) Messman's continuing material failure or refusal to
               perform his duties in accordance with the terms of this Agreement
               or to carry out in all material respects the lawful directives of
               the Board of Directors; provided that discharge pursuant to this
               subparagraph (v) shall constitute discharge for cause only if
               Messman has first received written notice from the Board of
               Directors of CTP stating with specificity the nature of such
               failure or refusal and, if requested by Messman within 10 days
               thereafter, Messman is afforded a reasonable opportunity to be
               heard before the Board.

          Upon termination for cause, Messman shall lose all right, title and
     interest in and to all payments required to be made in accordance with the
     provisions of this Agreement, and CTP shall have no further obligation to
     Messman hereunder, except for compensation pursuant to Paragraphs 4(a) and
     4(g) to which Messman is entitled through the date of termination, bonus
     compensation to which Messman is entitled for and in respect of the
     preceding fiscal year if not theretofore paid, and any benefits referred to
     in Paragraph 4 hereof to which Messman has a vested right under the terms
     and conditions of the plan or program pursuant to which such benefits were
     granted.

               (b) CTP, at the sole discretion of the Board of Directors, may
          remove Messman from the position of President and Chief Executive
          Officer without cause at any time. In the event of such removal
          without cause, CTP shall employ Messman in an advisory capacity for a
          period of not less than two years from the date of such removal and
          shall pay or provide to Messman during the two-year period: (i) his
          then Base Salary pursuant to the provisions of Paragraph 4(a) (ii) an
          amount equal to the average of the

                                       5
<PAGE>

          annual bonus paid to Messman for each of the two years prior to his
          removal, payable in the same periodic installments as his then Base
          Salary under (i) above, and (iii) the medical, health and life
          insurance coverages pursuant to the provisions of Paragraphs 4(d) and
          (e). Notwithstanding any of the foregoing, CTP shall not be obligated
          to make payments or provide benefits under this Subparagraph unless
          Messman has executed and delivered to CTP a further agreement
          satisfactory to CTP, including without limitation a general release of
          all claims, a provision incorporating his duties under Paragraphs 7
          and 8 and a continued assistance agreement.

               (c) Messman may terminate this Agreement by giving three (3)
          months' written notice to the Board of Directors of CTP. CTP can waive
          this notice and agree with Messman to an earlier termination date.
          Upon termination by Messman, all obligations of CTP and Messman under
          this Agreement will cease as of the date of final termination, except
          Messman's obligations under Paragraphs 7 and 8 will survive.

          7. Restrictive Covenants and Confidentiality; Injunctive Relief.

               (a) In exchange for and in consideration of this Agreement,
          Messman agrees that, during the Restricted Period (as defined below),
          he shall not, either directly or indirectly, in any capacity
          whatsoever:

                    (i) Solicit, entice or induce any Customer (as defined
               below) to become a client, customer, OEM, distributor or reseller
               of any other person, firm, corporation or other business with
               respect to products and/or services provided or under development
               by CTP, its affiliates, subsidiaries, successors or assigns
               before or during the Restricted Period, or to cease doing
               business with CTP, its affiliates, subsidiaries, successors or
               assigns, and Messman shall not approach any such person, firm,
               corporation or business for such purpose or authorize or
               knowingly allow the taking of such actions by any other person;

                    (ii) Solicit, induce or encourage any employee during the
               Restricted Period of CTP or its affiliates, subsidiaries,
               successors or assigns to become employed by any other person,
               firm, corporation or business or to leave their employment with
               CTP, its affiliates, subsidiaries, successors or assigns. In
               addition, neither Messman nor any person, corporation, firm or
               business for whom he is employed or with whom he is involved will
               hire any person who is then, or was at any time during the one
               year prior to such hiring, an employee of CTP, its affiliates,
               subsidiaries, successors or assigns, unless such employee is CTP
               involuntarily terminated by CTP, its affiliates, subsidiaries,
               successors or assigns.

                    (iii) Compete with, or encourage or assist others to compete
               with, solicit or engage in business in competition with, any
               business, product or service provided or under development by
               CTP, its affiliates, subsidiaries. successors or assigns before
               or during the Restricted Period. The restriction contained in
               this subparagraph shall apply anywhere where CTP, its affiliates,

                                       6
<PAGE>

               subsidiaries, successors or assigns conducted business in the two
               years preceding his termination or during the remainder of the
               Restricted Period thereafter.

          For purposes of this Paragraph 7, "Restricted Period" means, the Term
     of this Agreement and any renewals and extensions thereof, and in addition
     thereto:

               1. If Messman is terminated for cause, the two-year period
          beginning on the effective date of such termination; or

               2. If Messman is terminated without cause, the two-year period
          beginning on the effective date of such termination.

               3. If Messman terminates his employment pursuant to Paragraph
          6(c), the one-year period beginning on the effective date of such
          termination.

          For purposes of this Paragraph 7, a "Customer" means any person or
     entity which is or was a client, customer, OEM, distributor or reseller of
     CTP, its affiliates, successors or assigns or a bona fide prospect to
     become a Customer at any time in the two years preceding his employment
     termination or during the Restricted Period.

          Nothing in the foregoing shall prohibit Messman from engaging in any
     business that is not in competition with CTP, its affiliates, subsidiaries,
     successors and assigns after termination of employment with CTP, or
     investing in the securities of any corporation having securities listed on
     a national securities exchange, provided that such investment does not
     exceed 5% of any class of securities of any corporation engaged in business
     in competition with CTP, its affiliates and subsidiaries and provided that
     such ownership represents a passive investment and that neither Messman nor
     any group of persons including him, in any way, either directly or
     indirectly, manages or exercises control of any such corporation,
     guarantees any of its financial obligations, otherwise takes any part in
     its business, other than exercising his rights as a shareholder, or seeks
     to do any of the foregoing.

               (b) Messman acknowledges that during the Term of his employment,
          he will have access to confidential information of CTP, its affiliates
          and subsidiaries, including information about "Developments" (as
          defined in Paragraph 8 below), business plans, costs, customers,
          profits, markets, sales, products, services, strategies, marketing,
          key personnel, pricing policies, operational methods and other
          business affairs and methods and other information not available to
          the public or in the public domain (hereinafter referred to as
          "Confidential Information"). In recognition of the foregoing, Messman
          covenants and agrees that, except as required by his duties to CTP,
          Messman will keep secret all Confidential Information and will not,
          directly or indirectly, either during the Term of his employment
          hereunder or at any time thereafter while such Confidential
          Information remains confidential, disclose or disseminate to anyone or
          make use of, for any purpose whatsoever except for the benefit of the
          Company in the course of his employment, any Confidential Information,
          and upon termination of his employment, Messman will promptly deliver
          to CTP all tangible materials and objects containing Confidential
          Information (including all copies thereof, whether prepared by Messman
          or

                                       7
<PAGE>

          others) which he may possess or have under his control. The term
          "Confidential Information" shall not include any information which can
          be demonstrated (i) to be generally known in the industry or to the
          public other than through breach of Messman's obligations hereunder,
          (ii) to have been in Messman's possession prior to his employment with
          CTP and not assigned to CTP, or (iii) to have been disclosed to
          Messman by an independent third party not under any obligation of
          confidentiality.

               (c) Messman represents that he has, prior to the execution of
          this Agreement, reviewed this Agreement thoroughly.

               (d) Messman acknowledges that the restrictions contained in this
          Paragraph 7 are reasonable and necessary to protect the legitimate
          business interests of CTP and that CTP would not have entered into
          this Agreement in the absence of such restrictions. By reason of the
          foregoing, Messman agrees that if he violates any of the provisions of
          this Paragraph 7, CTP would sustain irreparable harm and, therefore,
          irrevocably and unconditionally (i) agrees that in addition to any
          other remedies which CTP may have under this Agreement or otherwise,
          all of which remedies shall be cumulative, CTP shall be entitled to
          apply to any court of competent jurisdiction for preliminary and
          permanent injunctive relief and other equitable relief, (ii) that such
          relief and any other claim by CTP pursuant hereto may be brought in
          the United States District Court for the District of Massachusetts, or
          if such court does not have subject matter jurisdiction or will not
          accept jurisdiction, in any court of general jurisdiction in the
          Commonwealth of Massachusetts; (iii) consents to the non-exclusive
          jurisdiction of any such court in any such suit, action or proceeding,
          and (iv) waives any objection which Messman may have to the laying of
          venue of any such suit, action or proceeding in any such court.
          Messman also irrevocably and unconditionally consents to the service
          of any process, pleadings, notices or other papers in a manner
          permitted by the notice provisions hereof. In the event that any of
          the provisions of this Paragraph 7 hereof should ever be adjudicated
          to exceed the time, geographic, product or service, or other
          limitations permitted by applicable law in any jurisdiction, then such
          provisions shall be deemed reformed in such jurisdiction to the
          maximum time, geographic, product or service, or other limitations
          permitted by applicable law. In the event of a lawsuit pursuant to
          this Paragraphs 7 and 8, the prevailing party shall be entitled to
          recover reasonable costs, expenses and attorney's fees from the other
          party.

               (e) Messman agrees that CTP may provide a copy of this Paragraph
          7 to any business or enterprise (i) which the Messman may directly or
          indirectly own, manage, operate, finance, join, control or participate
          in the ownership, management, operation, financing, or control of, or
          (ii) with which he may be connected with as an officer, director,
          employee, partner, principal, agent, representative, consultant or
          otherwise, or in connection with which he may use or permit his name
          to be used; provided, however, that this provision shall not apply as
          to subparagraph (a) or (b) after expiration of the time periods set
          forth therein or with respect to any activities, entities or persons
          excluded by the terms hereof. Messman will provide the names and
          addresses of any of such persons or entities as CTP may from time to
          time reasonably request.

                                       8
<PAGE>

               (f) In the event of any breach or violation of the restriction
          contained in subparagraph (a) above, the Restricted Period therein
          specified shall be tolled and shall not begin to run until such
          violation has been fully and finally cured.

          8. Ownership of Inventions and Ideas. Messman acknowledges that CTP
     shall be the sole owner of all the results and proceeds of Messman's
     service hereunder, including but not limited to, all patents, patent
     applications, patent rights, formulas, copyrights, inventions,
     developments, discoveries, other improvements, data, documentation,
     drawings, charts, and other written, audio and/or visual materials relating
     to equipment, methods, products, processes, or programs in connection with
     or useful to CTP's business (collectively, the "Developments") which
     Messman, by himself or in conjunction with any other person, may conceive,
     make, acquire, acquire knowledge of, develop or create during the Term of
     Messman's employment hereunder, free and clear of any claims by Messman (or
     any successor or assignee of him) of any kind or character whatsoever other
     than Messman's right to compensation hereunder. Messman acknowledges that
     all copyrightable Developments shall be considered works made for hire
     under the Federal Copyright Act. Messman hereby assigns and transfers his
     right, title and interest in and to all such Developments, and agrees that
     he shall, at the request of CTP, execute or cooperate with CTP in any
     patent applications, execute such assignments, certificates or other
     instruments, and do any and all other acts, as the Board of Directors of
     CTP from time to time reasonably deems necessary or desirable to evidence,
     establish, maintain, perfect, protect, enforce or defend CTP's right, title
     and interest in or to any such Developments.

          9. Survival and Assignment. The provisions of Paragraphs 7 and 8 shall
     survive the termination of this Agreement for any reason whatsoever. In
     addition, Paragraphs 7 and 8 shall inure to the benefit of CTP's successors
     and assigns and its rights hereunder will automatically be assigned.

          10. Change of Control.

               (a) If, during the Term, there should be a Change of Control (as
          defined herein) and the acquiring or resulting entity shall not offer
          Messman comparable employment before the effective date of such Change
          of Control, Messman's employment shall terminate and CTP shall
          continue to pay Messman his then current Base Salary on
          regularly-scheduled paydays, as reduced by all voluntary and required
          withholdings, for not less than two years from the effective date of
          such Change of Control.

               (b) Notwithstanding anything to the contrary in this Agreement or
          in any other agreement or document relating to stock grants, options,
          or restrictions, all stock grants and outstanding stock options
          granted to Messman shall become immediately vested and exercisable and
          any and all rights CTP may have to repurchase securities from Messman
          shall immediately expire on the effective date of such Change of
          Control to the extent permitted by the applicable plans and law.

               (c) Notwithstanding any of the foregoing, CTP shall not be
          obligated to make payments or provide benefits under this Subparagraph
          unless Messman has

                                       9
<PAGE>

          executed and delivered to CTP a further agreement satisfactory to CTP,
          including without limitation a general release of all claims, a
          provision incorporating his duties under Paragraphs 7 and 8 and a
          continued assistance agreement.

               (d) A "Change of Control" of CTP shall mean:

                    (i) The acquisition by any person, entity or "group" of
               beneficial ownership of 50% or more of either the then
               outstanding shares of common stock or the combined voting power
               of Company's then outstanding voting securities entitled to vote
               generally in the election of directors; and/or

                    (ii) The sale, conveyance or other disposition in one or a
               series of related transactions of all or substantially all of the
               assets of CTP.

          11. Disputes/Good Faith Negotiations

               (a) If any dispute arises under this Agreement that is not
          settled promptly in the ordinary course of business, Employer and
          Messman shall seek to resolve any such dispute between them, first, by
          negotiating promptly with each other in good faith in face-to-face
          negotiations.

               (b) Except as provided in respect of the provisions set forth in
          Paragraphs 7 and 8 hereof, and specifically as provided in Paragraph
          7(d), any dispute arising under this Agreement or out of his
          employment shall be resolved exclusively by arbitration before the
          American Arbitration Association at its Boston, Massachusetts offices
          in accordance with its National Rules for the Resolution of Employment
          Disputes. The arbitration decision shall be final and binding on both
          parties, who shall be precluded from bringing or raising in any court
          or other forum any dispute that was or could have been brought or
          raised pursuant to this Agreement. Judgment upon such award may be
          entered in any state or federal court of competent jurisdiction.

          12. Miscellaneous.

               (a) Any notice authorized or required to be given or made by or
          pursuant to this Agreement shall be made in writing and either
          personally delivered or mailed by overnight express mail to the
          respective address of the party to receive such notice, which address
          is the one designated below the name of such party on the signature
          page hereof, or to such other address as a party may specify by notice
          to the other parties hereto.

               (b) This Agreement cancels and supersedes any and all prior
          agreements and understandings, whether written or oral, between or
          among any or all of the parties hereto with respect to the employment
          by or obligations of Messman to any thereof. This Agreement
          constitutes the entire agreement among the parties with respect

                                       10
<PAGE>

          to the matters herein provided, and no modification or waiver of any
          provision hereof shall be effective unless in writing and signed by
          the parties hereto.

               (c) All of the terms and provisions of this Agreement shall be
          binding upon and inure to the benefit of and be enforceable by the
          respective heirs, executors, administrators, legal representatives,
          successors and assigns of the parties hereto, except that the duties
          and responsibilities of Messman hereunder are of a personal nature and
          shall not be assignable or delegable in whole or in part by Messman.

               (d) Messman agrees that the obligations of CTP hereunder shall be
          limited to CTP only, and Messman agrees that he shall not bring any
          claim or suit against any director, shareholder, employee or
          representative of CTP or any person other than CTP for any breach or
          default hereunder.

               (e) If any provision of this Agreement or application thereof to
          anyone or under any circumstances is adjudicated to be invalid or
          unenforceable in any jurisdiction, such invalidity or unenforceability
          shall not affect any other provision or application of this Agreement
          which can be given effect without the invalid or unenforceable
          provision or application and shall not invalidate or render
          unenforceable such provision or application in any other jurisdiction.

               (f) No remedy conferred upon any party by this Agreement is
          intended to be exclusive of any other remedy, and each and every such
          remedy shall be cumulative and shall be in addition to any other
          remedy given hereunder or now or hereafter existing at law or in
          equity. No delay or omission by any party in exercising any right,
          remedy or power hereunder or existing at law or in equity shall be
          construed as a waiver thereof, and any such right, remedy or power may
          be exercised by the party possessing the same from time to time and as
          often as may be deemed expedient or necessary by such party in its
          sole discretion.

               (g) This Agreement may be executed in several counterparts, each
          of which is an original. It shall not be necessary in making proof of
          this Agreement or any counterpart hereof to produce or account for any
          of the other counterparts.

          13. Controlling Law. The validity, interpretation, construction,
     performance and enforcement of this Agreement shall be governed by the laws
     of the Commonwealth of Massachusetts

                                       11
<PAGE>

     IN WITNESS WHEREOF, and intending to be bound hereby, Messman has hereunto
set his hand and CTP has caused this Employment Agreement to be duly executed.

                                          CAMBRIDGE TECHNOLOGY PARTNERS
                                          (MASSACHUSETTS), INC.

/s/ Jack L. Messman     /As of 8/27/99    By: /s/ James P. O'Hare /As of 8/27/99
--------------------------------------       -----------------------------------
Jack L. Messman             Date          Name:                       Date
                                               ---------------------------------
                                          Title:
                                                --------------------------------

                                       12

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