Document:

<PAGE>

                         PROFESSIONAL SERVICES AGREEMENT

     This Professional Services Agreement ("Agreement") is made and entered into
as of December 20, 2002 by and between Predictive Systems, the. ("Contractor"),
having its principal place of business at 19 West 44th Street, 9th floor, New
York, New York 10036, and Pfizer, Inc. (the "Company"), having its principal
place of business at 235 East 42nd Street, New York, New York 10017. As used
herein, the "Company" shall mean Pfizer, Inc., its subsidiaries and affiliates,
and an "affiliate" of any person shall mean any person directly or indirectly
controlling, controlled by or under common control with such person.

     In consideration of the mutual covenants and conditions contained herein,
and for other good and valuable consideration, the receipt and sufficiency of
which is hereby acknowledged, the parties hereto agree as follows:

1. SCOPE OF WORK

   1.1. During the term of this Agreement, Contractor agrees to provide the
        professional services described in Schedule A attached hereto (the
        "Work"), and to assign and dedicate the personnel listed on Schedule A
        (the "Personnel") in order to perform the Work. Contractor agrees
        that it shall only assign Personnel with the proper skill level and
        type of experience to ensure that the Work will be completed in a good
        and workmanlike manner as further provided in Section 4.1 below. Except
        as may otherwise be agreed by the parties in writing, Contractor shall
        furnish or cause to be furnished at its own cost all required labor,
        tools, equipment, material, parts, transportation and supervision
        necessary to perform the Work.

2. COMPENSATION

   2.1. As full and complete compensation for its services hereunder, the
        Company agrees to pay Contractor at the rate(s) specified in Schedule
        A. The rate(s) specified will remain in effect for the duration of this
        Agreement unless modified in accordance with this Agreement. All Work
        performed pursuant to this Agreement, including any Work performed
        on any day other than a Business Day, shall be compensated at the rates
        specified in Schedule A. For purposes of this Agreement, "Business Day"
        means any day on which the Company is open for business at its
        principal offices.

   2.2. Contractor shall be entitled to receive reimbursements of all of its
        "Out-of-Pocket" expenses directly related to performing the Work,
        provided that the nature and approximate amount of such expenses must
        be approved in advance by the Company in writing. The term
        Out-of-Pocket expenses includes, but is not limited to, reasonable and
        verifiable coach class travel, hotel accommodations and meal expenses,
        which Contractor incurs and that are directly related to the Work. All
        such expenses shall be reimbursed at cost; no mark-up shall be
        permitted.

<PAGE>

   2.3. The fees and expenses payable by the Company pursuant to this
        Agreement shall be invoiced to the Company by Contractor on a monthly
        basis, and shall set forth in reasonable detail the basis for the
        charges reflected therein. Each invoice shall include copies of
        receipts for all Out-of-Pocket expenses reflected therein. All invoices
        shall be payable within thirty (30) days of their receipt by the
        Company, provided, however, that if the Company should dispute in good
        faith the nature or basis of any charges contained in any invoice
        submitted by contractor hereunder, the Company shall promptly provide
        written notice to Contractor setting forth the reason for the dispute,
        after which the parties shall attempt to reach a resolution in good
        faith in accordance with Section 13.1 hereof. The payment of any
        disputed invoice shall be suspended until such dispute is resolved by
        the parties.

   2.4. On each invoice. Contractor shall itemize any taxes required to be
        collected or paid by Contractor, such as sales, use or excise taxes, but
        not taxes based upon Contractor's income.

3. TERM AND TERMINATION

   3.1. This Agreement shall be effective on the date hereof and, unless
        sooner terminated as provided herein, shall remain in effect for a
        period of one (1) year from its effective date.

   3.2. Either party may terminate this Agreement upon thirty (30) days prior
        written notice to the other party; provided, however, that the Company
        shall have the right at any time to (a) terminate any request for
        services on any specific task by providing Contractor with five (5)
        days prior written notice, and (b) terminate this Agreement immediately
        for (i) Contractor's refusal or inability to perform the Work, (ii)
        Contractor's breach of any provision of this Agreement or (iii)
        Contractor's failure to, in the Company's sole discretion,
        satisfactorily perform the Work.

   3.3. Upon the termination or expiration of this Agreement, Contractor agrees
        to promptly assemble all documents, write-ups, notes, computer
        programs, and other material related to the Work (including Materials
        defined in Section 9.1) and return them in an orderly fashion to
        authorized representatives of the Company.

   3.4. Upon a termination of this Agreement by the Company, the Company agrees
        to pay Contractor for services rendered and expenses incurred hereunder
        which have not been previously paid by the Company for the period up to
        and including the date of termination, except that the Company shall
        not be obligated to pay Contractor any amount which is disputed by the
        Company pursuant to Section 2.3.

   3.5. In the event of any termination of this Agreement, certain terms and
        conditions, including but not limited to WARRANTIES, OWNERSHIP OF
        MATERIALS, CONFIDENTIALITY, USE OF NAME, INSURANCE, INDEMNIFICATION;

                                      -2-
<PAGE>

        LIMITATION OF LIABILITY, NON-SOLICITATION and GENERAL, shall survive
        such termination.

4. DUTIES OF CONTRACTOR

   4.1. Contractor agrees that the Work performed by it and its Personnel
        hereunder shall be performed (a) in a good, workmanlike and
        efficient manner; (b) in accordance with applicable laws, regulations,
        codes, permits and licenses; (c) in accordance with the standard
        business practices and procedures employed in the Company's business
        including, but not limited to, procedures regarding security, data
        administration and operating practices; and (d) otherwise in accordance
        with the terms and conditions applicable to all sub-contractors,
        suppliers and vendors of the Company. In this respect, Contractor
        acknowledges that the Company has special responsibilities to drug
        regulatory agencies and to the public in view of the nature of its
        products and agrees to cooperate in every way with the Company to
        assist it in discharging these responsibilities. Contractor shall, for
        example, disclose educational background, job history, past addresses
        and other personal information concerning itself or its Personnel
        requested for purposes of a security check by the Company, and shall
        divulge any such additional information at the Company's reasonable
        request.

   4.2. Contractor shall obtain and pay for all necessary Federal, state and
        local licenses and permits necessary to enable it to perform this
        Agreement. Contractor shall collect and pay all Federal, state and
        local sales, use, excise and similar taxes attributable to the Work.
        Upon the Company's request, Contractor shall furnish the Company with
        copies of its receipts for such tax payments and copies of such
        licenses and permits. Contractor shall maintain records of its payment
        of such taxes throughout the term hereof and for a period of seven
        (7) years following the termination of this Agreement.

   4.3. Notwithstanding anything to the contrary contained herein, the Company
        shall have the right at any time to request the immediate termination
        and/or replacement of any or all Personnel assigned by Contractor to
        perform the Work.

5. WARRANTIES

   5.1. Contractor represents and warrants to the Company that Contractor's
        execution and performance of this Agreement:

        (a) will not violate or infringe upon the rights of any third party,
        including but not limited to confidential relationships, publicity
        rights, privacy rights, patents, trademarks, service marks, trade
        secrets or copyrights; and

        (b) will not conflict with or violate any commitment to, or agreement
        or understanding Contractor has or will have with, any other person or
        entity.

                                      -3-
<PAGE>

   5.2. Contractor further represents and warrants to the Company that:

        (a) Contractor has full right, power and authority to enter into this
        Agreement and there is nothing which will prevent Contractor from
        performing its obligations under the terms and conditions of this
        Agreement; and

        (b) this Agreement has been duly authorized by all necessary corporate
        action and constitutes a valid obligation of Contractor, binding on
        Contractor and enforceable in accordance with the terms hereof,

        (c)the goods sold and/or Work rendered pursuant to this Agreement are
        and will be manufactured, produced, sold, and rendered in conformity
        with all applicable laws, ordinances, orders, directions, rules and
        regulations of the Federal, state, county and municipal governments
        applicable thereto, all as they may be amended from time to time,
        including, but not limited to, Section 1033 of the Violent Crime
        Control and Law Enforcement Act of 1994.

   5.3. EXCEPT AS EXPRESSLY SET PORTH IN THIS AGREEMENT, CONTRACTOR SPECIFICALLY
        DISCLAIMS ANY AND ALL EXPRESS OR IMPLIED PROMISES, REPRESENTATIONS AND
        WARRANTIES WITH RESPECT TO THE SERVICES AND PRODUCTS PROVIDED
        HEREUNDER, INCLUDING, BUT NOT LIMITED TO, ANY WARRANTY AS TO ITS
        MERCHANTABILITY, OPERATION OR ITS FITNESS FOR ANY PARTICULAR PURPOSE,
        AS WELL AS ANY WARRANTIES ALLEGED TO HAVE ARISEN FROM CUSTOM, USAGE, OR
        PAST DEALINGS BETWEEN THE PARTIES.

6. INSURANCE

     6.1. Contractor shall maintain the insurance coverages listed in this
          Section 6.1 throughout the term of this Agreement. Contractor shall
          provide the Company with valid certificates of insurance showing
          evidence of the following coverages and amounts with insurance
          companies that have A.M. Best ratings of at least A.

          (i)  Workers' Compensation Insurance: Insurance for liability under
               Workers' Compensation or Occupational Disease laws of any state
               or jurisdiction in which services under this Agreement are
               performed and as is otherwise applicable with respect to persons
               performing services under this Agreement and Employer's Liability
               insurance, covering all claims by or with respect to employees of
               Contractor, providing:

                  (a)   Coverage for statutory limits of all claims under
                        applicable state Workers' Compensation laws. If the
                        services hereunder will result in exposure under the
                        U.S. Longshoremen's and Harbor Workers' Act and its
                        amendments, the Jones Act or the Federal Employer's
                        Liability Act coverage shall be extended to include
                        those laws;

                                       -4-
<PAGE>

          (b)  An endorsement providing that any claim "in rem" shall be treated
               as a claim "in personam"; and

          (c)  Voluntary compensation insurance covering all employees not
               subject to the applicable Workers' Compensation Act or acts.

   (ii)  Employers Liability Insurance: As required by the state wherein the
         services hereunder are to be performed, but in no case less than the
         following:

          (a)  Bodily Injury by Accident: [****] each accident

          (b)  Bodily Injury by Disease: [****] each employee

          (c)  policy limit

   (iii) Simplified ISO Commercial General Liability Insurance: Coverage on
         primary, non-contributing, occurrence basis including:

               (a)  Premises - Operations Coverage (including Medical Payments
                    coverage)

               (b)  Product - Completed Operations Coverage

               (c)  Bodily Injury Coverage

               (d)  Contractual Liability Coverage

               The following minimum limits will be in force:

               Bodily Injury and Property Damage: [****] each occurrence
               aggregate

     (iv) Commercial Automobile Liability Insurance: Covering all owned or
          leased motor vehicles to be used by Contractor in furtherance of the
          Work with the following minimum limits:

               Bodily Injury and Property Damage: [****] each accident

     (v)  Umbrella (Excess) Liability Insurance: Such coverage shall be
          maintained for the above-referenced Comprehensive General Liability,
          Comprehensive Automobile Liability and Employer's Liability
          coverages in an amount of not less than [****].

     (vi) Professional Liability Insurance:

****Represents material which has been redacted and filed separately with the
Securities and Exchange Commission pursuant to a request for confidential
treatment under Rule 24b-2 of the Securities Exchange Act of 1934, as amended.

                                       -5-
<PAGE>

     6.2. The certificates of insurance to be provided to the Company pursuant
          to Section 6.1 hereof must state that the Company is named as an
          additional insured under Contractor's Commercial General Liability and
          Commercial Automobile insurance policies for the duration of the term
          hereof. In addition, the certificates of insurance shall evidence
          Contractor's indemnification obligations hereunder and contain a
          provision that the coverages afforded under the policies will not be
          canceled or modified until at least thirty (30) days' prior written
          notice has been given to the Company. The compliance by Contractor
          with the insurance requirements hereof shall not relieve Contractor
          from liability under the indemnification provisions hereof.

7. INDEMNIFICATION; LIMITATION OF LIABILITY

     7.1. Contractor agrees to defend, indemnify and hold harmless thee
          Company, its officers, directors and employees (collectively, "Company
          Indemnitees") from and against any and all claims, actions, damages,
          costs, expenses (including reasonable attorneys' fees), losses or
          liabilities of any nature incurred or asserted against the Company
          Indemnitees (including any claim for bodily and personal injuries,
          including death, sustained by any person, including Contractor's
          Personnel, and for damage to property of any nature, including loss of
          use) to the extent that such claims, actions, damages, costs,
          expenses, losses or liabilities are caused by the negligence, fraud or
          misconduct of Contractor, its Personnel, or Contractor's affiliates,
          employees, agents, officers or directors.

     7.2  Notwithstanding any provision in this Agreement to the contrary,
          neither the Company nor its affiliates, partners, agents, vendors or
          its or their employees (including the Company Indemnitees), shall be
          liable hereunder for any consequential or indirect loss or damage or
          any other special or incidental damages incurred or suffered by
          Contractor or its directors, officers, employees or agents. The waiver
          and disclaimer of liability expressed herein shall survive
          termination of this Agreement, and shall apply whether in contract,
          equity, tort or otherwise, and shall extend to the Company
          Indemnitees, and the agents, divisions and subsidiaries of the
          Company, and their respective directors, officers and employees.

     7.3  NOTWITHSTANDING ANY OTHER PROVISIONS OF THIS AGREEMENT TO THE
          CONTRARY, THE COMPANY HEREBY ACKNOWLEDGES AND AGREES THAT CONTRACTOR'S
          TOTAL LIABILITY TO COMPANY SHALL IN NO CIRCUMSTANCE EXCEED THE AMOUNT
          OF THE INSURANCE COVERAGE REQUIRED BY SECTION 6 OF THIS AGREEMENT.

                                       -6-
<PAGE>

8. CONFIDENTIALITY

     8.1. It may be necessary or desirable for a party ("Discloser") to disclose
          to the other party or its Personnel ("Recipient") information that is
          confidential or proprietary to the Discloser and/or one or more of its
          affiliates ("Confidential Information"). Confidential Information
          includes, but is not limited to, the Materials and information related
          to the business affairs and/or procedures of the Discloser and/or one
          or more of its affiliates, or to the designs, programs, flowcharts,
          and documentation of the Discloser's information technology, whether
          or not owned by the Discloser, as well as information disclosed
          verbally, that is of such a sensitive nature that a reasonable person
          would presume it to be Confidential Information.

     8.2. Recipient agrees to use Confidential Information solely to provide the
          Work. Upon the Discloser's request, Recipient agrees to return all
          Confidential Information.

     8.3. Recipient will not, either during the term, or after the termination,
          of this Agreement:

            (a) disclose any Confidential Information to any third party; or

            (b) use Confidential Information for its own advantage, other than
                in the performance of this Agreement.

     8.4. Contractor agrees not to disclose to any third party the nature or
          content of the Work which Contractor performs for the Company
          pursuant to this Agreement.

     8.5. Recipient agrees to take all precautions necessary to safeguard the
          Discloser's property, including, without limitation, Confidential
          Information, that is in Recipient's knowledge or custody, or under
          Recipient's control.

   8.6. Contractor and the Company agree that certain information is not
        Confidential Information (and, if not, Contractor shall have no
        obligation with respect thereto) when any such information:

            (a) is in or enters into the public domain through no wrongful act
                of Recipient; or

            (b) is rightfully received from a third party without restriction
                and without breach of this Agreement; or

            (c) is approved for release by written authorization of the
                Discloser; or

            (d) is disclosed pursuant to the requirements of a governmental
                agency or by operation of law; or

                                      -7-
<PAGE>

            (e) is already in Recipient's possession as evidenced by its records
                and is not the subject of a separate nondisclosure agreement.

     8.7  If Recipient or any of Recipient's employees, or legal counsel to whom
          recipient discloses Confidential Information pursuant to this
          Agreement becomes legally compelled to disclose any Confidential
          Information, The Recipient agrees to provide the discloser with prompt
          notice thereof so that they may seek a protective order or other
          appropriate remedy and/or waive compliance with the provisions of this
          Agreement. If a protective order or other remedy is not obtained, the
          Recipient shall furnish only that portion of the Confidential
          Information which is legally required and shall cooperate in any
          action reasonably taken by the Discloser to seek to obtain other
          reliable assurance that confidential treatment will be accorded such
          Confidential Information. As between the parties hereto, the
          provisions of this Section 8 shall supersede the provisions of any
          inconsistent marking that may be affixed to said data by the
          discloser, and the inconsistent provisions of any such marking shall
          be without any force or effect.

9. OWNERSHIP OF MATERIALS

     9.1. [****]

     9.2. Contractor agrees not to install or use any proprietary software of a
          third party on the Company's computer system, premises or other
          tangible property unless Contractor has obtained, in writing, the
          software owner's permission or license to do so and the Company's
          written agreement to do so.

     9.3  Company and Contractor shall each retain ownership of, and all right,
          title and interest in and to, their respective, pre-existing
          intellectual property including, but not limited to: (a) patentable
          and unpatentable discoveries, and ideas, including, but not limited
          to, methods, techniques, "know-how", concepts, or products
          ("Inventions") and (b) all works fixed in any medium of expression,
          including copyright and mask work rights, and, except as set forth
          herein, no license therein, whether express or implied, is granted by
          this Agreement or as a result of the Services performed hereunder. To
          the extent the parties wish to grant rights or interests in
          pre-existing intellectual property beyond the rights granted pursuant
          hereto, separate license agreements on mutually acceptable terms will
          be executed.

****Represents material which has been redacted and filed separately with the
Securities and Exchange Commission pursuant to a request for confidential
treatment under Rule 24b-2 of the Securities Exchange Act of 1934, as amended.

                                      -8-
<PAGE>

     9.4  Contractor at all times retains the right to use any general
          "know-how", techniques, ideas, concepts, algorithms, or other
          knowledge acquired or developed during the performance of this
          Agreement, on behalf of itself and its future customers. Contractor
          may perform the same or similar services for others, provided that any
          Company confidential, proprietary or trade secret information is
          treated in accordance with the parties' obligations of confidentiality
          hereunder.

10. CONTINUITY OF PERSONNEL

    l0.1  [****]

11. NON-SOLICITATION

    11.1. The Company and Contractor mutually agree to refrain from hiring or
          soliciting for hire any employee or Personnel of the other who is
          assigned to the Work during the term of this Agreement and for a
          period of three (3) months from the termination or expiration thereof.

    11.2. Contractor also agrees that neither Contractor nor any entity or
          other person affiliated with Contractor shall, directly or indirectly,
          induce or permit, any employee of the Company to perform services of
          any kind for Contractor, or any such entity or other person (whether
          during such employee's normal working hours or otherwise), for which
          such employee is compensated in any manner by Contractor, or such
          entity or other person.

12. RELATIONSHIP OF THE PARTIES

    12.1. The Company and Contractor acknowledge and agree that nothing herein
          contained is intended to constitute them as employer/employee, joint
          ventures or partners, it being their intention that Contractor is an
          independent contractor. The Company acknowledges that the Personnel
          employed by Contractor in performing the Work shall remain at all
          times employees of Contractor, and Contractor shall remain solely
          liable for all aspects of the employment of such persons including,
          without limitation, recruitment, hiring, firing, training, promotion,
          compensation, all F.I.C.A., payroll taxes and other deductions and all
          premiums or payments made for Workers' Compensation coverage,
          unemployment benefits or any other payments required by law to be made
          by employers for or on behalf of employees.

    12.2. In the event Contractor is organized as a corporation, Contractor
          hereby represents that it currently employs and expects to employ
          throughout the term of this

****Represents material which has been redacted and filed separately with the
Securities and Exchange Commission pursuant to a request for confidential
treatment under Rule 24b-2 of the Securities Exchange Act of 1934, as amended.

                                      -9-
<PAGE>

          Agreement at least four (4) professional employees. In the event
          Contractor is organized as a partnership, Contractor hereby represents
          that it currently employs and expects to employ throughout the term of
          this Agreement at least four (4) employees or that it is currently
          composed of and expects to remain composed of throughout the term of
          this Agreement, at least four (4) partners.

13. DISPUTE RESOLUTION

    13.1. In the event of a dispute involving the interpretation or application
          of any provision of this Agreement, the parties agree not to commence
          litigation until they have first notified each other of their intent
          to implement the terms of this Section after first having employed
          their best efforts to jointly resolve such dispute. If the parties
          cannot resolve their differences in such fashion within thirty (30)
          days' of either party's receipt of such notice of the intent of the
          other party to implement the terms of this Section, the following
          alternative dispute resolution process (the venue of which shall be
          New York, New York) shall be immediately implemented:

          13.1.1. Upon written request of either party, the dispute will be
                  referred for negotiation to representatives of the parties who
                  have no direct operational responsibility for the matters
                  involved in the dispute and who have authority to resolve the
                  dispute.

          13.1.2. If these representatives have not agreed on a resolution of
                  such dispute within ten (10) Business Days of its referral to
                  them, the dispute shall be promptly submitted to a neutral
                  adviser (the "Adviser") who shall be chosen from the list of
                  arbitrators registered with the American Arbitration
                  Association. The Adviser shall, within fourteen (14) days of
                  the submission, recommend, in writing, a procedure for
                  resolving the dispute and shall specify in such writing
                  whether such procedure shall be binding, non-binding or
                  involve a combination of binding and non-binding procedures.

          13.1.3. If the parties do not mutually agree upon the process
                  recommended by the Adviser within ten (10) Business Days' of
                  their receipt of the Adviser's written recommendation, they
                  shall promptly convene a non-binding hearing (the
                  "Mediation"). The rules for the Mediation will be established
                  by the Adviser, after consultation with the parties.

          13.1.4. If the dispute cannot be resolved, either through the
                  procedure recommended by the Adviser or through the Mediation,
                  within such period as the Adviser shall deem reasonable, the
                  Adviser shall, at the request of either party, certify to the
                  parties that the matter is incapable of resolution.

                                      -10-
<PAGE>

          13.1.5. No litigation may be commenced concerning the dispute until
                  the Adviser has certified in writing that the dispute is
                  incapable of resolution, provided that any party may commence
                  litigation (a) on any date after which such litigation could
                  be barred by an applicable statute of limitations; or (b) if
                  litigation is otherwise necessary to prevent irreparable harm
                  to the moving party.

          13.1.6. Each party shall bear its own expenses in connection with
                  the alternative dispute resolution procedures set forth in
                  this Section, except that the parties shall split equally the
                  fees and expenses of the Adviser, including the costs
                  associated with any Mediation, and the fees and expenses of
                  any other person designated by the Adviser to assist the
                  parties.

      13.2. All communications made in connection with the alternative dispute
            resolution procedure set forth in this Section shall be treated as
            communications for the purpose of settlement and as such shall be
            deemed to be confidential and inadmissible in any subsequent
            litigation by virtue of Rule 408 of the Federal Rules of Evidence,
            as the same may be amended from time to time.

14. USE OF NAME

      14.1. Contractor shall not use the name, trade name, service marks,
            trademarks, trade, dress or logos of the Company (or any of its
            affiliates) in publicity releases, advertising or any other
            publication without the Company's prior written consent.

15. EQUAL EMPLOYMENT OPPORTUNITY

      15.1. If this Agreement is subject to the requirements of Executive Order
            8246, Section 503 of the Rehabilitation Act of 1973, or the Vietnam
            Era Veterans' Readjustment Act of 1974, Contractor agrees to comply
            with the equal employment opportunity clause set out at 41 CFR
            60-1.4 and the requirements for affirmative action for veterans and
            disabled persons set out at 41 CFR 60-250.4 and 60-741.4,
            respectively, and to maintain, provide, and control facilities in
            accordance therewith.

16. GENERAL

      16.1. Assignment; Subcontractors. Contractor will not assign this
            Agreement or any fees or amounts due to Contractor hereunder, in
            whole or in part, without the Company's prior written permission.
            Contractor shall not utilize any subcontractor or supplementary
            provider in providing the Work without the Company's prior written
            consent. The cost of any subcontractors and/or supplementary
            providers employed by Contractor shall not be an Out-of-Pocket
            Expense; and Contractor shall be solely responsible for such cost.

                                      -11-
<PAGE>

      16.2. Entire Agreement: Amendments. The provisions, terms and conditions
            of this Agreement (including its schedules) represent the entire
            agreement of the parties with regard to the subject matter of this
            Agreement and supersede any prior oral or written matter not
            included herein. No waiver, modification, change or amendment of any
            of the provisions of this Agreement shall be valid unless in writing
            and signed by the party against whom such claimed waiver,
            modification, change or amendment is sought to be enforced.

      16.3. Notices. All notices, requests, demands and other communications
            required or permitted to be given hereunder shall be in writing and
            shall be deemed to have been given (a) when received, if delivered
            in person, or (b) when sent, if send by facsimile with receipt
            confirmed, or (c) three (3) Business Days following the mailing
            thereof, if mailed by certified first class mail, postage prepaid,
            return receipt requested, in any such case as follows:

      if to the Company:

      Pfizer Inc.
      East 42nd Street
      New York, New York 10017
      Attention:
                ------------------------

      if to Contractor:

      Predictive Systems, Inc.
      19 West 44th Street, 9th floor
      New York, NY 10036
      Attention: Legal Department

      16.4. Records. Contractor will make available all the Company related
            contracts, copies, files, records, accounts and other documents and
            materials in Contractor's possession or under Contractor's control
            (except for files, records or documents relating to Contractor's
            internal administration of the Company's account with Contractor)
            for the Company's examination at any time, upon at least two (2)
            business days' prior notice, during Contractor's regular business
            hours during the term of this Agreement and for a period of one (1)
            year after the termination of this Agreement.

      16.5. Binding Effect. This Agreement shall be binding upon and shall inure
            to the benefit of the Company and Contractor, their respective
            successors and assigns; provided, however, that Contractor may not
            transfer or assign its rights or obligations under this Agreement
            without the prior written consent of the Company.

                                      -12-
<PAGE>

      16.5. Governing Law. This Agreement is to be construed and determined
            under the laws of the State of New York, without giving effect to
            the conflict of laws principles thereof.

      16.7. Headings. The heading of this Agreement are inserted merely for
            convenience and ease of reference and shall not affect or modify the
            meaning of any of the terms, covenants or conditions of this
            Agreement.

      16.8. Year 2000. Contractor represents and warrants that Contractor's use
            of software and hardware generally pursuant hereto, and specifically
            in its performance of the Work, will be unaffected by the passage
            of time for all calendar dates falling before, on, and after January
            1, 2000 and February 29, 2000 and by spans of time including either
            or both of these dates,

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

PFIZER INC.                                    PREDICTIVE SYSTEMS, INC.

/s/ [****]                                     /s/ [****]
------------------------------                 --------------------------------
          Signature                                        Signature

[****]                                         [****]
------------------------------                 --------------------------------
           Name                                              Name

[****]                                         [****]
------------------------------                 --------------------------------
          Title                                              Title

         12/20/02                                          12/23/02
------------------------------                 --------------------------------
           Date                                              Date

****Represents material which has been redacted and filed separately with the
Securities and Exchange Commission pursuant to a request for confidential
treatment under Rule 24b-2 of the Securities Exchange Act of 1934, as amended.

                                      -13-
<PAGE>

SCHIEDULE A
Scope of Work:

[****]

Assignment of Personnel, and Fees Therefor:

Contractor's Personnel assigned to the Company to perform the Work shall
include:

Name.               Daily Rate*             Effective Date
-----               -----------             --------------
                    [****]

*The daily rate, if specified, is for a seven (7) hour workday which excludes a
lunch period. If the Company requests that Contractor's Personnel work on an
overtime basis, such work will be paid at one-seventh of the daily rate for each
hour worked.

/s/ [****]               [****]
---------------------    ---------------    --------------------   -------------
Pfizer Inc.              Date               Contractor             Date

****Represents material which has been redacted and filed separately with the
Securities and Exchange Commission pursuant to a request for confidential
treatment under Rule 24b-2 of the Securities Exchange Act of 1934, as amended.<PAGE>

                                                                   Exhibit 10.55

                            THIRD AMENDMENT OF LEASE

         THIS THIRD AMENDMENT OF LEASE (this "Amendment") is made as of the ___
day of April, 2000, between VITAMIN REALTY ASSOCIATES, L.L.C. (the "LESSOR"), a
New Jersey limited liability company, having an address at 225 Long Avenue,
Hillside, New Jersey 07205, and ALL COMMUNICATIONS CORPORATION (the "LESSEE"), a
New Jersey corporation, having an address at 140 Route 22, Mountainside, New
Jersey 07092.

                               W I T N E S S E T H

         WHEREAS, pursuant to that certain Lease Agreement dated March 20, 1997
by and between LESSOR and LESSEE, LESSOR leased to LESSEE certain premises
consisting of approximately 1,560 rentable square feet of warehouse space on the
first floor of the building known as 225 Long Avenue, Hillside, New Jersey (the
"Building"), and approximately 7,180 rentable square feet of office space on the
second floor of the Building (collectively the "Demised Premises"); and

         WHEREAS, pursuant to that certain First Amendment of Lease dated as of
December, 1997, LESSOR and LESSEE amended the Lease to add to the Demised
Premises an additional 5,840 rentable square feet of warehouse space on the
first floor of the Building; and

         WHEREAS, pursuant to that certain Second Amendment of Lease dated as of
December, 1999, (which, together with the Lease Amendment and First Amendment
referred to above, shall be referred to herein as the "Lease"), LESSOR and
LESSEE amended the Lease to provide that LESSOR Leased to LESSEE a total of
13,730 rentable square feet of warehouse space on the first floor of the
Building, and a total of 8,491 rentable square feet of office space on the
second floor of the Building; and

         WHEREAS, pursuant to that certain Third Amendment of Lease dated as of
June 1, 2000, (which, together with the Lease Amendment, First Amendment and
Second Amendment referred to above, shall be referred to herein as the "Lease"),
LESSOR and LESSEE amended the Lease to provide that the Demised Premises
consists of a total of 18,000 rentable square feet of warehouse space on the
first floor of the Building, and a total of 15,215 rentable square feet of
office and warehouse space on the second floor of the Building; and

         WHEREAS, LESSOR and LESSEE have agreed to further amend the Lease, on
the terms and conditions hereinafter set forth; and

         WHEREAS, all capitalized terms defined in the Lease and not otherwise
defined herein shall have their respective meanings set forth in the Lease.

<PAGE>

         NOW, THEREFORE, in consideration of the mutual covenants contained
herein and other good and valuable consideration, the receipt and sufficiency of
which are hereby acknowledged, the parties hereto do hereby agree that the Lease
is hereby amended as follows:

         1.       (a) Commencing as of February 1, 2000 (the "First Additional
Space Commencement Date"), LESSOR shall demise to LESSEE, and LESSEE shall lease
from LESSOR, the space depicted in Schedule A attached hereto (the "First
Additional Space"). For all purposes of the Lease, and this Amendment, the term
"Demised Premises" shall, as of the First Additional Space Commencement Date,
include the then existing Demised Premises plus the First Additional Space.

                  (b) LESSOR and LESSEE each hereby agrees that the Demised
Premises shall, as of the First Additional Space Commencement Date, consist of a
total of 18,000 rentable square feet of warehouse space on the first floor of
the Building, and a total of 8,491 rentable square feet of office space on the
second floor of the Building.

                  (c) Commencing as of May 1, 2000 (the "Second Additional Space
Commencement Date"), LESSOR shall demise to LESSEE, and LESSEE shall lease from
LESSOR, the space depicted in Schedule B attached hereto (the "Second Additional
Space"). For al purposes of the Lease, and this amendment, the term "Demised
Premises" shall, as of the Second Additional Space Commencement Date, include
the then existing Demised Premises plus the Second Additional Space.

                  (d) LESSOR and LESSEE each hereby agrees that the Demised
premises shall, as of the Second Additional Space Commencement Date, consist of
a total of 18,000 rentable square feet of warehouse space on the first floor of
the Building, and a total of 15,215 rentable square feet of combined warehouse
and office space on the second floor of the Building.

         2.       (a) Schedule B of the Second Amendment is hereby superseded
and replaced with Schedule C annexed hereto.

                  (b) LESSEE's Proportionate Share with respect to the Demised
premises shall be 17.01% as of the First Additional Space Commencement Date.

                  (c) LESSEE's Proportionate Share with respect to the Demised
Premises shall be 21.32% as of the Second Additional Space Commencement Date.

         3. LESSEE agrees that it has inspected the Demised Premises, and agrees
to occupy any additional portions thereof in their "AS IS" condition.

         4. LESSOR and LESSEE each represents to the other that is has not dealt
with any broker or agent with respect to the Demised Premises or this Lease and
each shall indemnify and hold harmless the other from and against any and all
liabilities, claims, suits, demands, judgments, costs, interests and expenses to
which it may be subject or suffer by reason of any claim made by any person,
firm or corporation for any commission, expense or other compensation as a
result of the execution and delivery of this Lease and based on alleged
conversations or negotiations by said person, firm or corporation with either
LESSOR or LESSEE, as the case may be. LESSOR shall pay any commission due to the
Broker pursuant to a separate agreement.

                                       2
<PAGE>

         5. As hereby modified and amended, the Lease shall remain in full force
and effect.

         6. This Amendment and the Lease embody and constitute the entire
understanding between the parties with respect to the subject matter hereof, and
all prior agreements, representations and statements, oral or written, relating
to the subject matter hereof are merged into this Amendment.

         7. Neither this Amendment nor any provision contained herein may be
amended, modified or extended except by an instrument signed by the party
against whom enforcement of such amendment, modifications or extension is
sought.

         8. This Amendment may be executed in counterparts, each of which shall
be deemed a duplicate original hereof.

         IN WITNESS WHEREOF, this Amendment has been executed by LESSOR and
LESSEE as of the day and year first above written.

                                     VITAMIN REALTY ASSOCIATES, L.L.C.

                                     By:
                                              ---------------------------------
                                              Name:
                                              Title:

                                     ALL COMMUNICATIONS CORPORATION

                                     By:
                                              ---------------------------------
                                              Name:
                                              Title:

                                       3
<PAGE>

                                   SCHEDULE A

                             FIRST ADDITIONAL SPACE

                                       4
<PAGE>

                                   SCHEDULE B

                             SECOND ADDITIONAL SPACE

                                       5
<PAGE>

                                   SCHEDULE C

                                   BASIC RENT

                  The Basic Rent shall be payable in equal monthly installments,
in advance, on the Basic Rent Payment Dates. The Basic Rent for the Term shall
be as follows:

                  (a) for the period from the Commencement Date to, but not
including, the Inclusion Date (defined in the First Amendment), the Basic Rent
shall be $62,680.00 per annum, payable in equal monthly installments of
$5,306.67;

                  (b) for the period from the Inclusion Date to, but not
including, the Amendment Commencement Date (defined in the Second Amendment),
the Basic Rent shall be $87,040.00 per annum, payable in equal monthly
installments of $7,253.33;

                  (c) for the period from the Amendment Commencement Date to,
but not including, the First Additional Space Commencement Date (defined in the
Third Amendment), the Basic Rent shall be $122,846.00 per annum, payable in
equal monthly installments of $10,237,17;

                  (d) for the period from the First Additional Space
Commencement Date to, but not including, the Second Additional Space
Commencement Date (defined in the Third Amendment), the Basic Rent shall be
$139,928.00 per annum, payable in equal monthly installments of $11,660.67;

                  (e) for the period from the Second Additional Space
Commencement Date to, but not including, the Expansion Space Commencement Date
(defined in the Fourth Amendment), the Basic Rent shall be $193,720.00 per
annum, payable in equal monthly installments of $16,143.33;

                                       6

Source: [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00050-of-00352.parquet"}, [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00050-of-00352.parquet"}]]