Document:

<PAGE>
                                                                 Exhibit 10.25.1

                                         FIRST ADDENDUM TO
                      MASTER PROFESSIONAL SERVICES AGREEMENT NO. MNS00352199

         THIS ADDENDUM ("Addendum"), with an effective date July 26, 1999, is
entered into by and between BellSouth MNS, Inc. ("BellSouth") and Predictive
Systems, Inc. ("Predictive). The Addendum modifies Master Professional Services
Agreement No. MNS00352199, with an effective date of May 14, 1999 ("MPSA").

         WHEREAS, the parties have entered into a MPSA which enables Predictive
to perform professional services for BellSouth; and

         WHEREAS, the parties have determined that certain rules of engagement
and restriction of actions should be added to the MPSA;

         NOW, THEREFORE IN CONSIDERATION of the foregoing, and other good and
valuable consideration, the receipt and sufficiency of which are hereby
acknowledged, BellSouth and Predictive agree to amend the MPSA by adding the
following terms to the MPSA:

15. RIGHT OF FIRST REFUSAL

          a. During the Term of this Addendum, Predictive shall have a right of
             first refusal to perform the services itemized in Schedule 15.1,
             which BellSouth obtains the opportunity to perform. Prior to
             submitting a written proposal for such services to a potential
             Customer, BellSouth shall submit to Predictive an offer ("Offer")
             describing the proposed Project in reasonable detail, including the
             services to be performed by Predictive. Predictive shall have two
             (2) business days after receipt of the Offer (the "Offer Period")
             to inform BellSouth whether Predictive wishes to perform and is
             capable of performing the services. During the Offer Period,
             BellSouth shall respond promptly and in good faith to requests by
             Predictive for additional information with respect to the proposed
             Project. If Predictive accepts the Offer within the Offer Period,
             Predictive shall have the right to perform such services as an
             independent contractor to BellSouth. If Predictive rejects such
             offer or fails to accept the same within the Offer Period,
             BellSouth shall have the right to engage another independent
             contractor to perform such Project under the same terms offered to
             Predictive or to perform the same itself.

          b. Attached hereto as Schedule 15.2 is a list of existing and
             potential Predictive customers located within the existing
             BellSouth customer territory. Such customers (and services provided
             by Predictive thereto) shall not be subject to this Addendum.
             Schedule 15.2 shall be updated periodically to reflect changes to
             this customer list, as

                                  CONFIDENTIAL
                                                                     Page 1 of 4

<PAGE>

             obtained by Predictive through its own sales efforts and not in
             violation of this Addendum, subject to the agreement of BellSouth
             which shall not be unreasonably withheld.

          c. Except as set forth herein and in the MPSA, there shall be no
             limitations on the parties' respective activities, including,
             without limitation, their ability to offer independently and for
             their own accounts services marketed jointly by them pursuant to
             this Addendum.

          d. Upon termination of the MPSA this Addendum shall be considered null
             and void. Furthermore, either party may terminate this Addendum at
             any time by providing the other party with thirty (30) days written
             notice of its intent to terminate the Addendum. At this time all
             materials, written and electronic, developed solely by Predictive
             Systems relating to services outlined in Schedule 15.1 must be
             returned to Predictive and BellSouth must refrain from marketing or
             selling Predictive's independently developed methodology. Such
             materials and methodology shall constitute "Information" for
             purposes of the Nondisclosure Agreement ("NDA") dated as of March
             24, 1999, between Predictive and BellSouth. Such materials and
             methodology shall not be included in documents and other materials
             considered to be the property of BellSouth under section 12
             (Proprietary Rights) of the MPSA.

          e. Unless otherwise agreed to in writing by both parties, Predictive
             agrees that any opportunity being jointly pursued by Predictive and
             BellSouth under this Addendum, i.e. any opportunity which is
             subject to a written proposal, will not be pursued by Predictive
             independently. It is further agreed that except for customers
             released as set forth herein, during the term of this Addendum, and
             for six (6) months after the termination of this Addendum,
             Predictive will not pursue any customer introduced to them by
             BellSouth in either a pre-sales effort that resulted in proposed
             work from Predictive or actual services delivered. The parties
             agree to jointly develop and maintain a list of customers that
             Predictive is prohibited from independently pursuing. Such list is
             attached hereto as Schedule 15.3, and shall be updated from time to
             time. At least once per quarter, Predictive and BellSouth will
             review the customer account(s) on Schedule 15.3 to determine
             whether the appropriate activity levels for the sales of Predictive
             services are being met. The criteria for this evaluation should
             include but not be limited to the number of proposed projects and
             the revenue associated with those proposed projects. In the event
             BellSouth and Predictive both agree that the requisite activity
             levels are not being met for the reviewed customer account(s), and

                                  CONFIDENTIAL
                                                                     Page 2 of 4

<PAGE>

             neither party can conceive a solution to increase activity levels,
             BellSouth will release Predictive to pursue business independently
             for the purpose of such account(s). Said agreement and release
             shall not be unreasonably withheld.

          f. For purposes of sections (b) and (e) of this Addendum, the term
             "customer" shall be deemed to refer to the operating or business
             unit as to which the relevant customer decision-maker exercises
             purchasing authority. As a result of the forgoing definition, the
             parties acknowledge and agree that a single entity may contain
             several "customers" for purposes of section (b) and (e) of this
             Addendum.

          Except as expressly modified by this Addendum, the MPSA shall remain
in full force and effect.

         IN WITNESS WHEREOF, this Addendum has been executed BellSouth and
Predictive by their duly authorized representatives.

BELLSOUTH MNS, INC.                            PREDICTIVE SYSTEMS, INC.

By:_________________________                   By:______________________________

Name:_______________________                   Name:____________________________

Title:______________________                   Title:___________________________

Date:_______________________                   Date:_______________________

                                  CONFIDENTIAL
                                                                     Page 3 of 4

<PAGE>

                                 Schedule 15.1

[***] Professional Services

--------------------------------------------------------------------------------
 1. [***]                                       Project Based
--------------------------------------------------------------------------------
 2. [***]                                       Project Based
 -------------------------------------------------------------------------------
 3. [***]                                       Project Based
--------------------------------------------------------------------------------

--------------------------------------------------------------------------------

[***] Professional Services

--------------------------------------------------------------------------------
 1. [***]                                       Project Based
--------------------------------------------------------------------------------
 2. [***]                                       Project Based
--------------------------------------------------------------------------------

--------------------------------------------------------------------------------

--------------------------------------------------------------------------------

                                  CONFIDENTIAL

--------
*** Represents material that has been redacted pursuant to a request for
    confidential treatment pursuant to Rule 406 under the Securities Act of
    1933, as amended. Omitted material for which confidential treatment has been
    requested has been filed separately with the Securities and Exchange
    Commission.

<PAGE>

                                  Schedule 15.2

[***] by Predictive Systems Inc. as defined by a submission of a written
proposal or an otherwise [***].

[***]

--------------------------------------------------------------------------------

--------------------------------------------------------------------------------

--------------------------------------------------------------------------------

--------------------------------------------------------------------------------

--------------------------------------------------------------------------------

--------------------------------------------------------------------------------

--------------------------------------------------------------------------------

--------------------------------------------------------------------------------

                                  CONFIDENTIAL

Initials:   BellSouth______    Predictive_______

--------
*** Represents material that has been redacted pursuant to a request for
    confidential treatment pursuant to Rule 406 under the Securities Act of
    1933, as amended. Omitted material for which confidential treatment has been
    requested has been filed separately with the Securities and Exchange
    Commission.

                                                                     Page 1 of 1

<PAGE>

                                  Schedule 15.3

[***] by Predictive and BellSouth, as defined by submission of a written
proposal or an otherwise [***].

<TABLE>
<CAPTION>
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<S>                          <C>                        <C>                        <C>
[***]
-------------------------------------------------------------------------------------------------------------

-------------------------------------------------------------------------------------------------------------

-------------------------------------------------------------------------------------------------------------

-------------------------------------------------------------------------------------------------------------

-------------------------------------------------------------------------------------------------------------

-------------------------------------------------------------------------------------------------------------

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-------------------------------------------------------------------------------------------------------------

-------------------------------------------------------------------------------------------------------------

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</TABLE>

                                  CONFIDENTIAL
Initials:   BellSouth______    Predictive_______

--------
*** Represents material that has been redacted pursuant to a request for
    confidential treatment pursuant to Rule 406 under the Securities Act of
    1933, as amended. Omitted material for which confidential treatment has been
    requested has been filed separately with the Securities and Exchange
    Commission.

                                                                     Page 1 of 1

<PAGE>

                                                                  Amendment No.1
                                                 Effective Date: January 1, 2000
                                                                     Page 1 of 2

                               Amendment No. 1 To
                           Agreement No. MNS 00352199
                                     between
                               BELLSOUTH MNS, INC.
                                       and
                             PREDICTIVE SYSTEMS INC.

BELLSOUTH MNS, INC., a(n) Georgia corporation ("Customer"), and PREDICTIVE
SYSTEMS INC., a(n) Delaware corporation ("Vendor"), enter into this Amendment
No. 1 ("Amendment") effective January 1, 2000.

The parties hereby agree that all the terms and conditions attached hereto are
fully incorporated herein by this reference.

IN WITNESS WHEREOF, the parties have, manually or by electronic signature,
executed this Amendment by their duly authorized representatives in one or more
counterparts, each of which shall constitute an original, on the effective date
specified above.

<TABLE>
<CAPTION>
Predictive Systems Inc.                             BellSouth MNS Inc.

<S>                                                 <C>
By:                                                 By:
         --------------------------------------            -----------------------------------------
               (Authorized Signature)                               (Authorized Signature)

Name:              [***]                            Name:  [***]
         --------------------------------------            -----------------------------------------
                  (Print or Type)                                      (Print or Type)

Title:                                              Title: [***]
                   [***]
         --------------------------------------            -----------------------------------------
</TABLE>

                            PRIVATE/PROPRIETARY/LOCK
                 CONTAINS PRIVATE AND/OR PROPRIETARY INFORMATION
          MAY NOT BE USED OR DISCLOSED OUTSIDE THE BELLSOUTH COMPANIES
                     EXCEPT PURSUANT TO A WRITTEN AGREEMENT.
                 MUST BE STORED IN LOCKED FILES WHEN NOT IN USE.

--------
*** Represents material that has been redacted pursuant to a request for
    confidential treatment pursuant to Rule 406 under the Securities Act of
    1933, as amended. Omitted material for which confidential treatment has been
    requested has been filed separately with the Securities and Exchange
    Commission.

<PAGE>

                                                                  Amendment No.1
                                                 Effective Date: January 1, 2000
                                                                     Page 2 of 2

The following is Amendment No. 1 to Agreement No. MNS 00352199 effective January
1, 2000, ("Agreement") between BellSouth MNS, Inc. ("Customer") and Predictive
Systems Inc. ("Vendor"). The Agreement is hereby amended as follows:

     1.  Section 4, "Pricing and payment Terms", is hereby amended in its
         entirety:

         4.a. MNS shall pay Predictive Systems for the Services in accordance
         with the rates established in the attached Exhibit "C'. Exhibit C rate
         schedule is active from January 1, 2000 through the end of the existing
         Master Services Agreement between BellSouth MNS and Predictive Systems.
         This agreement is currently in effect through May 14, 2001. [***]. In
         the event of any inconsistency between the rates shown in the SOW
         (Exhibit "A") and Exhibit "C", the rates agreed upon in the mutually
         executed SOW shall govern. Effective January 1, 2000, the 'volume' of
         Predictive Systems business will be [***] A quarterly review will occur
         to reconcile any invoices and/or payments that may have used the
         incorrect rate category. See attached Exhibit "C".

     2.  Section 15, "Business Guidelines", is hereby added to the Agreement and
         shall state as follows:

         15. Business Guidelines. Predictive Systems hereby agrees that for all
         new business conducted from January 1, 2000 onward with any internal
         operating unit of BellSouth Corp. (BellSouth Affiliate) (a "Internal
         Project"), Predictive shall conduct such business transaction under the
         scope of this contract. Exceptions to this are the current, Predictive
         Systems direct ongoing business with the BellSouth Science & Technology
         and BellSouth Information Systems units and any BellSouth Project that
         MNS. Chooses not to participate in. Predictive Systems shall give MNS
         written notice of each Internal Project that Predictive System is
         requested to perform. MNS shall have five (5) business days from the
         receipt of such notice to inform Predictive Systems in writing that MNS
         wants to participate in such Project. If no response is received by
         Predictive Systems from MNS within 5 days than MNS will be deemed to
         have declined to participate in the Project and Predictive Systems will
         not be bound by the restrictions contained in this Paragraph in regards
         to such Project.

     3.  Section 14, "Governing Law", is hereby amended in its entirety:

         14.b. This Agreement shall be governed by and constructed in accordance
         with the laws of the state of Georgia, without giving effect to the
         conflicts of law principles thereof.

     4.  In all other respects, Agreement No. MNS 00352199 shall remain
         unchanged and in full force and effect.

     5.  This Amendment shall be effective on January 1, 2000.

         The parties hereto acknowledge that they have read this Amendment,
         understand it, and agree to be bound by its terms and conditions. They
         further agree that Agreement No. MNS 00352199 together with the First
         Addendum dated July 23, 1999 and this Amendment No.1, constitute the
         entire agreement between the parties hereto with respect to the subject
         matter hereof.

                            PRIVATE/PROPRIETARY/LOCK
                 CONTAINS PRIVATE AND/OR PROPRIETARY INFORMATION
          MAY NOT BE USED OR DISCLOSED OUTSIDE THE BELLSOUTH COMPANIES
                     EXCEPT PURSUANT TO A WRITTEN AGREEMENT.
                 MUST BE STORED IN LOCKED FILES WHEN NOT IN USE.

--------
*** Represents material that has been redacted pursuant to a request for
    confidential treatment pursuant to Rule 406 under the Securities Act of
    1933, as amended. Omitted material for which confidential treatment has been
    requested has been filed separately with the Securities and Exchange
    Commission.

<PAGE>

                                                               [LOGO]
                                                        PREDICTIVE SYSTEMS

--------------------------------------------------------------------------------

[***]

for BellSouth [***]

--------------------------------------------------------------------------------

1.0 February 2, 2000

               Owner: [***] / Subject to non-disclosure agreement
                                     [***]

           P R E D I C T I V E  S Y S T E M S  C O N F I D E N T I A L

--------
*** Represents material that has been redacted pursuant to a request for
    confidential treatment pursuant to Rule 406 under the Securities Act of
    1933, as amended. Omitted material for which confidential treatment has been
    requested has been filed separately with the Securities and Exchange
    Commission.

<PAGE>

[***] is responsible for the development of this document.

Contact:

[***]

Predictive Systems, Inc.
20 Mansell Court, Suite 200
Roswell, GA 30076

Revision history

<TABLE>
<CAPTION>

------------------------------------------------------------------------------------------------------------
Version              Date                  Comments required                Approvals required
-------------------- --------------------- -------------------------------- --------------------------------
<S>                  <C>                  <C>                               <C>
1.0                  2/2/2000
-------------------- --------------------- -------------------------------- --------------------------------

------------------------------------------------------------------------------------------------------------
</TABLE>

Predictive Systems approval:

--------------------------------------------------------------------------------
Signed                                                Name

--------------------------------------------------------------------------------
Title                                                 Date

[***]
Proposal

1.0 February 2, 2000

Copyright(C) 2000, Predictive Systems, Inc. All rights reserved. Predictive
Systems, BusinessFirst, and the Predictive Systems logo are trademarks of
Predictive Systems, Inc.

No part of this document may be reproduced in any form or by any electronic or
mechanical means, including information storage and retrieval devices or
systems, without prior written permission from Predictive Systems, Inc. This
document or information it contains may not be used, reproduced, or disclosed
outside of BellSouth without authorization in writing by Predictive Systems,
Inc.

               Owner: [***] / Subject to non-disclosure agreement
                                     [***]

           P R E D I C T I V E  S Y S T E M S  C O N F I D E N T I A L

[***]

--------
*** Represents material that has been redacted pursuant to a request for
    confidential treatment pursuant to Rule 406 under the Securities Act of
    1933, as amended. Omitted material for which confidential treatment has been
    requested has been filed separately with the Securities and Exchange
    Commission.

                                                                              ii

<PAGE>

C O N F I D E N T I A L--Use, reproduction, or disclosure is subject to the
restrictions in DFARS 252.227-7013 & 252.211-7015/FAR 52.227-14 & 52.227-19 for
commercial computer software or technical data provided to the U.S. government
with limited rights, as applicable.

               Owner: [***] / Subject to non-disclosure agreement
                                      [***]

           P R E D I C T I V E  S Y S T E M S  C O N F I D E N T I A L

[***]

--------
*** Represents material that has been redacted pursuant to a request for
    confidential treatment pursuant to Rule 406 under the Securities Act of
    1933, as amended. Omitted material for which confidential treatment has been
    requested has been filed separately with the Securities and Exchange
    Commission.

                                                                             iii

<PAGE>

--------------------------------------------------------------------------------
                                Table of Contents
--------------------------------------------------------------------------------

Introduction                                                                  1
  Non-disclosure                                                              2
  Deadline for response                                                       2

Proposed statement of work                                                    3
  Project description                                                         3
    [***]                                                                     3
                                                                              4
                                                                              5
                                                                              6
  Assumptions                                                                 6
  Deliverables                                                                8
  Reporting methods                                                          10
    Status reports                                                           10
    Status meetings                                                          10
  Scope and cost                                                             10
    Project duration and staffing                                            10
    Project costs and billing                                                11

Predictive Systems Contacts                                                  12

About Predictive Systems                                                     13
  Predictive Systems' services                                               13
  Predictive Systems' practice areas                                         14
    [***]                                                                    14

               Owner: [***] / Subject to non-disclosure agreement
                                      [***]

           P R E D I C T I V E  S Y S T E M S  C O N F I D E N T I A L

[***]

--------
*** Represents material that has been redacted pursuant to a request for
    confidential treatment pursuant to Rule 406 under the Securities Act of
    1933, as amended. Omitted material for which confidential treatment has been
    requested has been filed separately with the Securities and Exchange
    Commission.

                                                                              iv

<PAGE>

--------------------------------------------------------------------------------
Introduction
--------------------------------------------------------------------------------

BellSouth has embarked on a strategic goal to [***] in support of BellSouth
[***], as well as [***]. Currently, BellSouth maintains these [***],
as well as a [***]. In an effort to leverage existing technologies, processes,
support infrastructure and facilities where appropriate, BellSouth would like to
[***]

In support of this initiative, Predictive Systems will first perform a [***].
This knowledge must be gained to outline a strategic plan with which to
formulate the [***].

This Assessment will result in a [***], consistent with the [***]. The initial
[***].

[***]. At the conclusion of this Assessment service, Predictive Systems will be
prepared to partner with BellSouth in order to perform the [***].

As with any large, complex project, the implementation of this assessment will
bring technical challenges, cost roadblocks, organizational obstacles, and
philosophical debates. Predictive Systems provides a structured methodology for
resolving the problems that emerge during the life cycle of such a project.

The application of this methodology will ensure the accurate, reliable, and
effective delivery of a valuable service.

               Owner: [***] / Subject to non-disclosure agreement
                                      [***]

           P R E D I C T I V E  S Y S T E M S  C O N F I D E N T I A L

[***]

--------
*** Represents material that has been redacted pursuant to a request for
    confidential treatment pursuant to Rule 406 under the Securities Act of
    1933, as amended. Omitted material for which confidential treatment has been
    requested has been filed separately with the Securities and Exchange
    Commission.

                                                                               1

<PAGE>

Predictive Systems has profiled the resources that are required to design and
implement the proposed assessment. In addition, we have provided a fixed price
proposal for the delivery of this service.

Non-disclosure
--------------------------------------------------------------------------------

All information contained in this proposal and quotation is confidential and
proprietary to Predictive Systems, constituting its trade secrets and
privileged, confidential property. It is furnished to BellSouth in confidence,
with the understanding that it will not, without written permission of
Predictive Systems, be used for other than evaluation purposes or be disclosed
to any third party. Duplication of this proposal and quotation is strictly
forbidden, and all copies shall be returned to Predictive Systems upon our
request.

Deadline for response
--------------------------------------------------------------------------------

This proposal is valid for 30 days from the date of issuance, unless extended in
writing by Predictive Systems.

               Owner: [***] / Subject to non-disclosure agreement
                                      [***]

           P R E D I C T I V E  S Y S T E M S  C O N F I D E N T I A L

[***]

--------
*** Represents material that has been redacted pursuant to a request for
    confidential treatment pursuant to Rule 406 under the Securities Act of
    1933, as amended. Omitted material for which confidential treatment has been
    requested has been filed separately with the Securities and Exchange
    Commission.

                                                                               2

<PAGE>

--------------------------------------------------------------------------------
Proposed statement of work
--------------------------------------------------------------------------------

Project description
--------------------------------------------------------------------------------

Predictive Systems will perform a [***]. Predictive will provide BellSouth with
a *** The result of this Assessment is a [***]. This framework can then be
expanded to support [***]

Predictive Systems' [***] our team to become [***]. The goal is not only to
[***] but also to [***]. Predictive Systems will use [***]:

1. [***]

2. [***]

3. [***]

4. [***]

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

[***], Predictive Systems will [***]. All documentation must be provided during
the first week of the project to ensure completion within the defined schedule,
and organizational charts must be provided at the kick-off meeting to ensure
interviews are conducted in a timely manner. Required documents to be provided
by BellSouth in order for Predictive to complete the [***], but are not limited
to, the following:

o [***]

               Owner: [***] / Subject to non-disclosure agreement
                                      [***]

           P R E D I C T I V E  S Y S T E M S  C O N F I D E N T I A L

[***]

--------
*** Represents material that has been redacted pursuant to a request for
    confidential treatment pursuant to Rule 406 under the Securities Act of
    1933, as amended. Omitted material for which confidential treatment has been
    requested has been filed separately with the Securities and Exchange
    Commission.

                                                                               3

<PAGE>

o [***]

o [***]

o [***]

o [***]

o [***]

o [***]

To properly [***], it is important to have a hands-on review of the [***].
Face-to-face discussions with engineering and operations staff are invaluable in
determining the current environment and the requirements of the organization.

Predictive Systems will conduct the following activities during BellSouth
facility visits:

o  [***]

o  [***]

o  [***]

o  [***]

o  [***]

Identify requirements
--------------------------------------------------------------------------------

Predictive Systems will conduct interview sessions with the appropriate
designated BellSouth staff, to be selected jointly prior to the kick-off
meeting. This step will include [***] that will be scheduled during the first 2
weeks of the project. [***].

The BellSouth point of contact will be required to [***] with assigned BellSouth
site contacts for each location so that candidates can be [***] in support of
the aggressive goals of the project.

               Owner: [***] / Subject to non-disclosure agreement
                                      [***]

           P R E D I C T I V E  S Y S T E M S  C O N F I D E N T I A L

[***]

--------
*** Represents material that has been redacted pursuant to a request for
    confidential treatment pursuant to Rule 406 under the Securities Act of
    1933, as amended. Omitted material for which confidential treatment has been
    requested has been filed separately with the Securities and Exchange
    Commission.

                                                                               4

<PAGE>

Since these interview sessions are a key component to the [***], Predictive
Systems will need to interview candidates from various groups within and [***].
Interview candidates should represent those who make [***]. Another group of key
interview candidates are BellSouth personnel [***]:

o [***]

o [***]

o [***]

o [***]

o [***]

o [***]

o [***]

o [***]

o [***]

o [***]

o [***]

o [***]

Review Preliminary Findings
--------------------------------------------------------------------------------

A Preliminary Findings Review will be held after the initial findings have been
compiled and preliminary analysis has been performed. All members involved in
the [***] should attend this meeting. The goal of the meeting will be to review
the findings, gain consensus as to their accuracy, and formalize the next steps.

The virtual framework of a successful [***] is comprised of [***]. Predictive
Systems will document the strategic direction for BellSouth based on their
[***]. Additionally, Predictive Systems will outline specific tactical solutions
that enable [***].

               Owner: [***] / Subject to non-disclosure agreement
                                      [***]

           P R E D I C T I V E  S Y S T E M S  C O N F I D E N T I A L

[***]

--------
*** Represents material that has been redacted pursuant to a request for
    confidential treatment pursuant to Rule 406 under the Securities Act of
    1933, as amended. Omitted material for which confidential treatment has been
    requested has been filed separately with the Securities and Exchange
    Commission.

                                                                               5

<PAGE>

[***] present deliverables
--------------------------------------------------------------------------------

At the conclusion of the [***], Predictive Systems will present its findings to
BellSouth. The following deliverables will be provided:

o   [***]

o   [***]

o   [***]

o   [***]

The overall goal of this presentation is to set (reset) expectations of the
organization and provide a planned solution to meet BellSouth's [***].

Assumptions
--------------------------------------------------------------------------------

In presenting this proposal, Predictive Systems has made the following
assumptions:

o    [***]

o    [***]

               Owner: [***] / Subject to non-disclosure agreement
                                      [***]

           P R E D I C T I V E  S Y S T E M S  C O N F I D E N T I A L

[***]

--------
*** Represents material that has been redacted pursuant to a request for
    confidential treatment pursuant to Rule 406 under the Securities Act of
    1933, as amended. Omitted material for which confidential treatment has been
    requested has been filed separately with the Securities and Exchange
    Commission.

                                                                               6

<PAGE>

o    [***]

o    [***]

o    [***]

o    [***]

o    [***]

o    BellSouth's [***] will provide assistance in gathering or providing samples
     and reports required for this project as per a pre-arranged and agreed upon
     schedule.

o    Predictive Systems will identify a Program Manager under separate Statement
     of Work who will act as the BellSouth Single Point of Contact for [***].

o    A Predictive Systems Assessment Project Team Leader will be designated and
     be responsible for the activity scheduling, status reporting, and final
     report delivery coordination with the Program Manager.

o    BellSouth will designate a staff member to function as the BellSouth Single
     Point of Contact (SPOC) to work with the Predictive Program Manager for
     coordination of [***]. The BellSouth SPOC will help facilitate the transfer
     of required documentation & information to Predictive and [***]. The
     BellSouth SPOC will also coordinate with the Predictive Program Manager to
     discuss and/or resolve any other issues pertaining to the project.

               Owner: [***] / Subject to non-disclosure agreement
                                      [***]

           P R E D I C T I V E  S Y S T E M S  C O N F I D E N T I A L

[***]

--------
*** Represents material that has been redacted pursuant to a request for
    confidential treatment pursuant to Rule 406 under the Securities Act of
    1933, as amended. Omitted material for which confidential treatment has been
    requested has been filed separately with the Securities and Exchange
    Commission.

                                                                               7

<PAGE>

o    BellSouth will designate site contacts at each of the facility locations
     for interviews, engineering sessions, and site visits. [***].

o   Interview candidates will be selected prior to project kick-off to ensure
    timely execution of the project activities.

o   In order to maintain project schedules, the BellSouth SPOC must insure that
    timely responses are obtained (within three business days) from project
    participants. This includes, but is not limited to, requests for
    documentation, inquiry responses, reviewing draft documents, and project
    progress/direction feedback.

--------------------------------------------------------------------------------
Note
--------------------------------------------------------------------------------

Changes in the above assumptions may result in changes to Predictive Systems'
Project Price and/or delivery time lines.

Deliverables
--------------------------------------------------------------------------------

The following deliverables will be provided at the conclusion of the project:

o [***]

o [***]

o [***]

o [***]

Deliverables will be provided by Predictive Systems to the BellSouth point of
contact for review and acceptance. BellSouth will provide written notification
to Predictive Systems within two (2) weeks if a project deliverable is not
accepted due to errors or non-conformance to the agreed upon content and format.

            Owner: [***] / Subject to non-disclosure agreement
                                      [***]

           P R E D I C T I V E  S Y S T E M S  C O N F I D E N T I A L

[***]

--------
*** Represents material that has been redacted pursuant to a request for
    confidential treatment pursuant to Rule 406 under the Securities Act of
    1933, as amended. Omitted material for which confidential treatment has been
    requested has been filed separately with the Securities and Exchange
    Commission.

                                                                               8

<PAGE>

If BellSouth fails to issue either a notice of acceptance or a list of
deficiencies within two (2) weeks following the date of delivery, [***]. If a
list of unaccepted deliverables is issued, Predictive Systems shall notify
BellSouth in writing of its concurrence or objections to any noted unacceptable
deficiencies within ten (10) days of receipt of such list. Predictive Systems
shall have a reasonable time to resolve all agreed upon deficiencies and
demonstrate the corrections to BellSouth. Within ten (10) days following the
delivery of Predictive Systems' notice that the deficiencies have been
corrected, BellSouth shall issue a written notice of acceptance to Predictive
Systems. This shall be deemed as final acceptance for the deliverables.

               Owner: [***] / Subject to non-disclosure agreement
                                      [***]

           P R E D I C T I V E  S Y S T E M S  C O N F I D E N T I A L
[***]

--------
*** Represents material that has been redacted pursuant to a request for
    confidential treatment pursuant to Rule 406 under the Securities Act of
    1933, as amended. Omitted material for which confidential treatment has been
    requested has been filed separately with the Securities and Exchange
    Commission.

                                                                               9

<PAGE>

Reporting methods

Status reports
--------------------------------------------------------------------------------

The Predictive Systems team will provide a weekly status report in electronic
format to the Program Manager and [***]. The report form will be brief, listing
any items that were completed that week and the open items for the next week.
The purpose of the reports is to provide weekly information on the status of the
project and any outstanding issues from the week. The reports will be available
on Monday morning.

Status meetings
--------------------------------------------------------------------------------

Weekly project status meetings will be held between (at minimum) the Predictive
Program Manager and [***]. This meeting should reoccurring and per-scheduled for
the same time and day every week. During the meeting, the prior week's progress
will be discussed along with issues, critical path items and activity plans for
the current week. This meeting will also provide a platform for reviewing any
new issues or additional project requirements.

Scope and cost

Project duration and staffing
--------------------------------------------------------------------------------

[***]

               Owner: [***] / Subject to non-disclosure agreement
                                      [***]

           P R E D I C T I V E  S Y S T E M S  C O N F I D E N T I A L

[***]

--------
*** Represents material that has been redacted pursuant to a request for
    confidential treatment pursuant to Rule 406 under the Securities Act of
    1933, as amended. Omitted material for which confidential treatment has been
    requested has been filed separately with the Securities and Exchange
    Commission.

                                                                              10

<PAGE>

The following table provides the proposed duration of each task identified as a
component of this project. Note that some tasks will be performed in parallel to
meet the timeframes required by BellSouth.

Table 1  [***]
--------------------------------------------------------------------------------
Project Task                                                   Task Duration -
                                                               Business Days
-------------------------------------------------------------- -----------------
[***]                                                          1 day
-------------------------------------------------------------- -----------------
                                                               12 days
-------------------------------------------------------------- -----------------
                                                               12 days
-------------------------------------------------------------- -----------------
                                                               2 days
-------------------------------------------------------------- -----------------
                                                               12 days
-------------------------------------------------------------- -----------------
                                                               1 day
--------------------------------------------------------------------------------

Project costs and billing
--------------------------------------------------------------------------------

[***]

1.   Predictive Systems consulting services will be primarily performed during a
     standard workweek (Monday through Friday, 8:00 am to 5:00 pm). On occasion,
     work activities may require scheduling of services outside a standard
     workweek. Services required outside a standard workweek will be mutually
     agreed to in advance by Predictive Systems and BellSouth.

2.   Travel and living expenses are not included in these rates.

3.   Predictive Systems will submit a single invoice upon project completion.
     Payment is required within 30 days of invoice receipt.

               Owner: [***] / Subject to non-disclosure agreement
                                      [***]

           P R E D I C T I V E  S Y S T E M S  C O N F I D E N T I A L

[***]

--------
*** Represents material that has been redacted pursuant to a request for
    confidential treatment pursuant to Rule 406 under the Securities Act of
    1933, as amended. Omitted material for which confidential treatment has been
    requested has been filed separately with the Securities and Exchange
    Commission.

                                                                              11
<PAGE>

--------------------------------------------------------------------------------
Predictive Systems Contacts
--------------------------------------------------------------------------------

Direct all business and management communications regarding this project to
[***] of Predictive Systems at [***].

Direct all technical communications regarding this project to [***] of
Predictive Systems. The technical contact can be reached at [***].

               Owner: [***] / Subject to non-disclosure agreement
                                      [***]

           P R E D I C T I V E  S Y S T E M S  C O N F I D E N T I A L

[***]

--------
*** Represents material that has been redacted pursuant to a request for
    confidential treatment pursuant to Rule 406 under the Securities Act of
    1933, as amended. Omitted material for which confidential treatment has been
    requested has been filed separately with the Securities and Exchange
    Commission.

                                                                              12

<PAGE>

--------------------------------------------------------------------------------
About Predictive Systems
--------------------------------------------------------------------------------

Predictive Systems is a network consulting and integration firm that specializes
in the design, management, and security of business-critical networks.
Recognized in the industry for its vendor-independent perspective, the firm's
expertise lies in solving multi-faceted, complex network problems. At Predictive
Systems, network technology serves two purposes: to make money and to save
money.

Predictive Systems' unique BusinessFirst(TM) methodology helps Fortune-1000
clients define, package, and measure network services. BusinessFirst is rooted
in the concept that a company should run its IT organization as a business.
Throughout the BusinessFirst process, Predictive Systems translates strategic
business objectives into sound, achievable technology solutions. This approach
ensures that the technology never obscures the business goals.

Predictive Systems' BusinessFirst methodology can clarify the business
requirements driving the project in specific, measurable terms. Predictive
Systems quantifies factors such as business risk, total cost of ownership, and
operational efficiency to build a complete financial justification for a network
project. By instrumenting every system to measure and quantify the key factors
that govern success, Predictive Systems turns complexity into clarity.

Predictive Systems serves its clients with a collaborative practice structure
that delivers both breadth and depth of experience to all aspects of a project.
Predictive Systems has the people and processes to build networks that mean
business.

Predictive Systems' services
--------------------------------------------------------------------------------

Predictive Systems offers a unique combination of expertise in network
management, performance management, internetwork engineering, information
security, and software development. Predictive Systems' engineers combine skill
in network management applications with real-world experience using
state-of-the-art internetwork technologies, including Asynchronous Transfer Mode
(ATM) and Asymmetric Digital Subscriber Line (ADSL), to address the
multi-faceted challenges of designing and managing mission-critical networks.
When technology "gaps" are discovered in a client's network, or disparate
systems need to communicate with one another, Predictive Systems' software
developers build custom applications to solve these problems. These custom
applications can turn a collection of products into an integrated system.

               Owner: [***] / Subject to non-disclosure agreement
                                      [***]

           P R E D I C T I V E  S Y S T E M S  C O N F I D E N T I A L

[***]

--------
*** Represents material that has been redacted pursuant to a request for
    confidential treatment pursuant to Rule 406 under the Securities Act of
    1933, as amended. Omitted material for which confidential treatment has been
    requested has been filed separately with the Securities and Exchange
    Commission.

                                                                              13

<PAGE>

Predictive Systems' practice areas
--------------------------------------------------------------------------------

Predictive Systems' consultants are organized into areas of specialization, or
practice areas. Although many engineers are cross-skilled in a variety of
technologies, and many technologies span multiple practice areas, each practice
area represents an aspect of network technology important enough to warrant
specialization. In addition, the Software Development and Technical Publications
departments span all practice areas. Resources from all of these groups are
available to define and implement the technological solutions that best meet our
clients' business needs.

Enterprise                                 Information
Network                                       Security
Management

Internetwork
Design and                                 Performance
Engineering                                 Management

[***]

               Owner: [***] / Subject to non-disclosure agreement
                                      [***]

           P R E D I C T I V E  S Y S T E M S  C O N F I D E N T I A L

[***]

--------
*** Represents material that has been redacted pursuant to a request for
    confidential treatment pursuant to Rule 406 under the Securities Act of
    1933, as amended. Omitted material for which confidential treatment has been
    requested has been filed separately with the Securities and Exchange
    Commission.

                                                                              14

<PAGE>

[***]

               Owner: [***] / Subject to non-disclosure agreement
                                      [***]

           P R E D I C T I V E  S Y S T E M S  C O N F I D E N T I A L

[***]

--------
*** Represents material that has been redacted pursuant to a request for
    confidential treatment pursuant to Rule 406 under the Securities Act of
    1933, as amended. Omitted material for which confidential treatment has been
    requested has been filed separately with the Securities and Exchange
    Commission.

                                                                              15

<PAGE>

                                                                Exhibit 10.25.6

--------------------------------------------------------------------------------
Proposed Statement of Work
--------------------------------------------------------------------------------

Project: [***]
--------------------------------------------------------------------------------

[***]

--------
*** Represents material that has been redacted pursuant to a request for
    confidential treatment pursuant to Rule 406 under the Securities Act of
    1933, as amended. Omitted material for which confidential treatment has been
    requested has been filed separately with the Securities and Exchange
    Commission.

<PAGE>

[***]

--------
*** Represents material that has been redacted pursuant to a request for
    confidential treatment pursuant to Rule 406 under the Securities Act of
    1933, as amended. Omitted material for which confidential treatment has been
    requested has been filed separately with the Securities and Exchange
    Commission.

<PAGE>

[***]

--------
*** Represents material that has been redacted pursuant to a request for
    confidential treatment pursuant to Rule 406 under the Securities Act of
    1933, as amended. Omitted material for which confidential treatment has been
    requested has been filed separately with the Securities and Exchange
    Commission.

<PAGE>

[***]

--------
*** Represents material that has been redacted pursuant to a request for
    confidential treatment pursuant to Rule 406 under the Securities Act of
    1933, as amended. Omitted material for which confidential treatment has been
    requested has been filed separately with the Securities and Exchange
    Commission.

<PAGE>

[***]

[***]

[***]

--------
*** Represents material that has been redacted pursuant to a request for
    confidential treatment pursuant to Rule 406 under the Securities Act of
    1933, as amended. Omitted material for which confidential treatment has been
    requested has been filed separately with the Securities and Exchange
    Commission.

<PAGE>

--------------------------------------------------------------------------------
Contacts
--------------------------------------------------------------------------------

Direct all business development and contractual communications regarding this
project to [***]. All technical questions can be answered by [***].

Description of resources to be utilized: This is a fixed price engagement for
[***].

Rate plan for resources:

Travel and expense for any phase of this project will be billed separately.

Cost Estimate: Labor: $ p/hr___ Travel: $_______ Other: $_______ Total: $_______

================================================================================
                     Invoice Predictive Systems Instructions
Submit invoice with valid documentation to:     Copy to:

Name:

Address:

Phone:

Fax:
================================================================================
                           Accepted and Agreed to by:
PREDICTIVE SYSTEMS                      [***]

Signature:                              Signature:
          -------------------------               ------------------------------

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

Date:                                   Date:
     ------------------------------          -----------------------------------

================================================================================

--------
*** Represents material that has been redacted pursuant to a request for
    confidential treatment pursuant to Rule 406 under the Securities Act of
    1933, as amended. Omitted material for which confidential treatment has been
    requested has been filed separately with the Securities and Exchange
    Commission.

<PAGE>

                                    EXHIBIT A
                              PROFESSIONAL SERVICES
                                STATEMENT OF WORK

                                      Client Name:  [***]
                                                  ------------------------------
                                      Agreement Number #
                                                        ------------------------
                                      Purchase Order #
                                                      --------------------------
                                      Submit Date:     02-25-00
                                                  ------------------------------
                                      Prepared By:    [***]
                                                  ------------------------------

BY EXECUTING THIS STATEMENT OF WORK THE UNDERSIGNED PARTIES ACKNOWLEDGE AND
AGREE THAT THE TERMS AND CONDITIONS OF THE AGREEMENT REFERENCED ABOVE SHALL
GOVERN THE SERVICES PERFORMED HEREUNDER.
================================================================================
                             Description of Services

Description of work to be performed by location:

Summary
--------------------------------------------------------------------------------

This project is for BellSouth's client, [***].

[***]

--------------------------------------------------------------------------------
                                   CONFIDENTIAL                    Form 0297-001

--------
*** Represents material that has been redacted pursuant to a request for
    confidential treatment pursuant to Rule 406 under the Securities Act of
    1933, as amended. Omitted material for which confidential treatment has been
    requested has been filed separately with the Securities and Exchange
    Commission.

                                                                   Page 1 of 3

<PAGE>

[***]

--------
*** Represents material that has been redacted pursuant to a request for
    confidential treatment pursuant to Rule 406 under the Securities Act of
    1933, as amended. Omitted material for which confidential treatment has been
    requested has been filed separately with the Securities and Exchange
    Commission.

<PAGE>

                                    EXHIBIT A
                              PROFESSIONAL SERVICES
                                STATEMENT OF WORK

                                      Client Name:  [***]
                                                  ------------------------------
                                      Agreement Number #
                                                        ------------------------
                                      Purchase Order #
                                                      --------------------------
                                      Submit Date:     02-03-00
                                                  ------------------------------
                                      Prepared By:    [***]
                                                  ------------------------------

BY EXECUTING THIS STATEMENT OF WORK THE UNDERSIGNED PARTIES ACKNOWLEDGE AND
AGREE THAT THE TERMS AND CONDITIONS OF THE AGREEMENT REFERENCED ABOVE SHALL
GOVERN THE SERVICES PERFORMED HEREUNDER.

================================================================================
                             Description of Services

Description of work to be performed by location:

Please see the attached SOW titled the [***].

Description of resources to be utilized: See proposal

Rate plan for resources: Fixed price engagement [***] plus travel and expense

Cost Estimate: Labor: $ p/hr___ Travel: $_______ Other: $_______ Total: $_______

================================================================================
                     Invoice Predictive Systems Instructions
Submit invoice with valid documentation to:     Copy to:

Name:

Address:

Phone:

Fax:

================================================================================
                           Accepted and Agreed to by:
PREDICTIVE SYSTEMS                           [***]

Signature:                               Signature:
          ------------------------                 -----------------------------

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

Date:                                    Date:
      ----------------------------            ----------------------------------

================================================================================

--------------------------------------------------------------------------------
                                   CONFIDENTIAL                    Form 0297-001

--------
*** Represents material that has been redacted pursuant to a request for
    confidential treatment pursuant to Rule 406 under the Securities Act of
    1933, as amended. Omitted material for which confidential treatment has been
    requested has been filed separately with the Securities and Exchange
    Commission.
                                                                   Page 1 of 3

<PAGE>

                                    EXHIBIT A
                              PROFESSIONAL SERVICES
                                STATEMENT OF WORK

                                        Client Name:   [***]
                                                    ----------------------------
                                        Agreement Number #
                                                          ----------------------
                                        Purchase Order #
                                                        ------------------------
                                        Start Date:
                                                   -----------------------------
                                        Submission Date:    November xx, 1999
                                                        ------------------------
                                        Prepared By: [***]
                                                    ----------------------------

BY EXECUTING THIS STATEMENT OF WORK THE UNDERSIGNED PARTIES ACKNOWLEDGE AND
AGREE THAT THE TERMS AND CONDITIONS OF THE AGREEMENT REFERENCED ABOVE SHALL
GOVERN THE SERVICES PERFORMED HEREUNDER.

================================================================================
                             Description of Services
Description of work to be performed by location:
   See Section A: Project Description below.
Description of resources to be utilized:
   See Section B: Project Resources and Responsibilities below.
Rate plan for resources:
   See Section C: Pricing and Project Duration below.
Cost Estimate: Labor:         Travel: $        Other: [***]     Total: $[***]
                     --------          -------        --------         --------

================================================================================
                     Invoice Predictive Systems Instructions
Submit invoice with valid documentation to:    Copy to:

Name:

Address:

Phone:

Fax:

================================================================================
                           Accepted and Agreed to by:
PREDICTIVE SYSTEMS                     [***]

Signature:                               Signature:
          ------------------------                 -----------------------------

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

Date:                                    Date:
     -----------------------------            ----------------------------------

================================================================================

--------------------------------------------------------------------------------
                                CONFIDENTIAL                       Form 0297-001

--------
*** Represents material that has been redacted pursuant to a request for
    confidential treatment pursuant to Rule 406 under the Securities Act of
    1933, as amended. Omitted material for which confidential treatment has been
    requested has been filed separately with the Securities and Exchange
    Commission.

                                                                   Page 1 of 5

<PAGE>

Section A: Project Description

BellSouth Telecommunications, Inc. on behalf of [***] to provide a Project
Manager to manage the [***] throughout the southeast, BellSouth Territory. [***]

In support of this project, Predictive Systems will provide the [***]. This
Statement of Work details the costs associated with installation and
configuration, as well as the hardware and software costs for the performance
management platform. A separate Statement of Work contains labor costs
associated with the planning, analysis and on-going capacity planning services
utilizing this platform.

Installation and Configuration Services
--------------------------------------------------------------------------------

Predictive Systems will provide the following services to install and configure
the Performance Management platform:

   1. [***]

   2. [***]

   3. [***]

   4. [***]

Deliverables
--------------------------------------------------------------------------------

The deliverables for this project will include the [***]. This platform will be
[***]. Upon installation, the platform will [***]. Such configuration will be
performed during the [***], which will be detailed under separate Statement of
Work. Deliverables provided for this Statement of Work are as follows:

   o  [***]

   o  [***]

   o  [***]

Note: A separate Statement of Work contains [***].

--------------------------------------------------------------------------------
                                CONFIDENTIAL                       Form 0297-001

--------
*** Represents material that has been redacted pursuant to a request for
    confidential treatment pursuant to Rule 406 under the Securities Act of
    1933, as amended. Omitted material for which confidential treatment has been
    requested has been filed separately with the Securities and Exchange
    Commission.

                                                                   Page 2 of 5

<PAGE>

Assumptions
--------------------------------------------------------------------------------
The following assumptions were made by Predictive Systems in the preparation of
the price, schedule, and resource estimates contained in this proposal:

   o  [***]

   o  [***]

   o  [***]

   o  [***]

   o  [***]

   o  [***]

   o  [***]

   o  [***]

[***] acknowledges these assumptions as valid upon acceptance and signing of
this proposal. Changes in the above assumptions can result in changes to
Predictive Systems' charges and/or delivery dates.

--------------------------------------------------------------------------------
                                CONFIDENTIAL                       Form 0297-001

--------
*** Represents material that has been redacted pursuant to a request for
    confidential treatment pursuant to Rule 406 under the Securities Act of
    1933, as amended. Omitted material for which confidential treatment has been
    requested has been filed separately with the Securities and Exchange
    Commission.

                                                                   Page 3 of 5

<PAGE>

Section B: Project Resources and Responsibilities

Predictive Systems
--------------------------------------------------------------------------------
Predictive Systems will identify a Project Manager who will act as the [***]
single point of contact for all project-related issues. The Project Manager will
also be responsible for status reporting and delivery of the hardware/software
platform. Predictive Systems will utilize one Performance Management senior
consultant for installation and configuration activities associated with this
project. The Project Manager will [***].

[***]
--------------------------------------------------------------------------------
[***] will designate a Client Project Liaison to work with Predictive Systems to
coordinate and schedule all installation activities and provide the Predictive
Systems' project team with the requested documentation, information, and
appropriate personnel. This person will act as the single point of contact for
Predictive Systems to discuss and resolve any other issues pertaining to the
project and will be responsible for obtaining the appropriate security
clearances and escorts for Predictive Systems' personnel at [***].

In order to maintain project schedules, the Client Project Liaison must ensure
that timely responses are obtained (within three business days) from project
participants. This includes but is not limited to requests for documentation,
answering questions, and providing feedback. Failure to obtain timely
information may result in project schedule slippage.

Acceptance
--------------------------------------------------------------------------------
Deliverables will be delivered by Predictive Systems to the Client Project
Liaison for review and acceptance. [***] will provide written notification to
Predictive Systems within one (1) week if a project deliverable is not accepted
due to errors or non-conformance to the agreed upon content and format.

If [***] fails to issue either a notice of acceptance or a list of deficiencies
within one (1) week following the date of delivery, the deliverables shall be
deemed as accepted by [***]. If a list of unaccepted deliverables is issued,
Predictive Systems shall notify [***] in writing of its concurrence or
objections to any noted unacceptable deficiencies within ten (10) days of
receipt of such list. Predictive Systems shall have a reasonable time to resolve
all agreed upon deficiencies and demonstrate the corrections to [***]. Within
ten (10) days following the delivery of Predictive Systems' notice that the
deficiencies have been corrected, [***] shall issue a written notice of
acceptance to Predictive Systems. This shall be deemed as Final Acceptance for
the deliverables.

--------------------------------------------------------------------------------
                                CONFIDENTIAL                       Form 0297-001

--------
*** Represents material that has been redacted pursuant to a request for
    confidential treatment pursuant to Rule 406 under the Securities Act of
    1933, as amended. Omitted material for which confidential treatment has been
    requested has been filed separately with the Securities and Exchange
    Commission.

                                                                   Page 4 of 5

<PAGE>

Section C: Pricing and Project Duration

The platform service proposed to [***] will have a project duration of [***].
[***] project includes:

[***]

--------
*** Represents material that has been redacted pursuant to a request for
    confidential treatment pursuant to Rule 406 under the Securities Act of
    1933, as amended. Omitted material for which confidential treatment has been
    requested has been filed separately with the Securities and Exchange
    Commission.

<PAGE>

                                    EXHIBIT A
                              PROFESSIONAL SERVICES
                                STATEMENT OF WORK

                                        Client Name:   [***]
                                                    ----------------------------
                                        Agreement Number #
                                                          ----------------------
                                        Purchase Order #
                                                        ------------------------
                                        Start Date:
                                                   -----------------------------
                                        Prepared By:
                                                    ----------------------------

BY EXECUTING THIS STATEMENT OF WORK THE UNDERSIGNED PARTIES ACKNOWLEDGE AND
AGREE THAT THE TERMS AND CONDITIONS OF THE AGREEMENT REFERENCED ABOVE SHALL
GOVERN THE SERVICES PERFORMED HEREUNDER.

================================================================================
                             Description of Services
Description of work to be performed by location: [***]
[***]

As per BellSouth, the anticipated effort will be: [***]

Description of resources to be utilized: [***]

Rate plan for resources: [***]

<TABLE>
<S>             <C>                      <C>                     <C>                 <C>
Cost Estimate: [***]_________ Travel: $ Actual________ Other: $_________ Total: $__________
</TABLE>
================================================================================
                     Invoice Predictive Systems Instructions
Submit invoice with valid documentation to:    Copy to:

Name:

Address:

Phone:

Fax:

================================================================================
                           Accepted and Agreed to by:
PREDICTIVE SYSTEMS                      [***]

Signature:                              Signature:
          ------------------------                ------------------------------

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

Date:                                   Date:
      ----------------------------           -----------------------------------
================================================================================

--------------------------------------------------------------------------------
                                  CONFIDENTIAL                     Form 0297-001

--------
*** Represents material that has been redacted pursuant to a request for
    confidential treatment pursuant to Rule 406 under the Securities Act of
    1933, as amended. Omitted material for which confidential treatment has been
    requested has been filed separately with the Securities and Exchange
    Commission.

                                                                   Page 1 of 3
<PAGE>

                                    EXHIBIT A
                              PROFESSIONAL SERVICES
                                STATEMENT OF WORK

                                              Client Name:   [***]
                                                          ----------------------
                                              Agreement Number #
                                                                ----------------
                                              Purchase Order #
                                                              ------------------
                                              Submit Date:        02-14-00
                                                          ----------------------
                                              Prepared By:    [***]
                                                          ----------------------

BY EXECUTING THIS STATEMENT OF WORK THE UNDERSIGNED PARTIES ACKNOWLEDGE AND
AGREE THAT THE TERMS AND CONDITIONS OF THE AGREEMENT REFERENCED ABOVE SHALL
GOVERN THE SERVICES PERFORMED HEREUNDER.

================================================================================
                             Description of Services
Description of work to be performed by location:

[***]

--------------------------------------------------------------------------------
                                  CONFIDENTIAL                     Form 0297-001

--------
*** Represents material that has been redacted pursuant to a request for
    confidential treatment pursuant to Rule 406 under the Securities Act of
    1933, as amended. Omitted material for which confidential treatment has been
    requested has been filed separately with the Securities and Exchange
    Commission.

                                                                   Page 1 of 3

<PAGE>

[***]

Cost Estimate:  see Table 1.

================================================================================
                     Invoice Predictive Systems Instructions
Submit invoice with valid documentation to:   Copy to:

Name:

Address:

Phone:

Fax:

================================================================================
                           Accepted and Agreed to by:
PREDICTIVE SYSTEMS                        [***]

Signature:                                Signature:
          ----------------------                    ----------------------------

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

Date:                                     Date:
     ---------------------------               ---------------------------------

================================================================================

--------
*** Represents material that has been redacted pursuant to a request for
    confidential treatment pursuant to Rule 406 under the Securities Act of
    1933, as amended. Omitted material for which confidential treatment has been
    requested has been filed separately with the Securities and Exchange
    Commission.

<PAGE>

                                    EXHIBIT A
                              PROFESSIONAL SERVICES
                                STATEMENT OF WORK

                                      Client Name:    [***]
                                                  ------------------------------
                                      Agreement Number #
                                                        ------------------------
                                      Purchase Order #
                                                      --------------------------
                                      Start Date:
                                                 -------------------------------
                                      Prepared By:
                                                  ------------------------------

BY EXECUTING THIS STATEMENT OF WORK THE UNDERSIGNED PARTIES ACKNOWLEDGE AND
AGREE THAT THE TERMS AND CONDITIONS OF THE AGREEMENT REFERENCED ABOVE SHALL
GOVERN THE SERVICES PERFORMED HEREUNDER.

================================================================================
                             Description of Services
Description of work to be performed by location: [***]
[***]

As per BellSouth, the anticipated effort will be: [***]

Description of resources to be utilized: [***]

Rate plan for resources: [***]

<TABLE>
<S>              <C>                          <C>                      <C>                   <C>
Cost Estimate: Labor: [***]__________   Travel: $ Actual_________  Other: $___________  Total: $____________
</TABLE>

================================================================================
                     Invoice Predictive Systems Instructions
Submit invoice with valid documentation to:    Copy to:

Name:

Address:

Phone:

Fax:

================================================================================
                           Accepted and Agreed to by:
PREDICTIVE SYSTEMS                       [***]

Signature:                               Signature:
          ---------------------                    -----------------------------

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

Date:                                    Date:
     --------------------------               ----------------------------------

================================================================================

--------------------------------------------------------------------------------
                                  CONFIDENTIAL                     Form 0297-001

--------
*** Represents material that has been redacted pursuant to a request for
    confidential treatment pursuant to Rule 406 under the Securities Act of
    1933, as amended. Omitted material for which confidential treatment has been
    requested has been filed separately with the Securities and Exchange
    Commission.

                                                                   Page 1 of 3

<PAGE>

                                    EXHIBIT A
                              PROFESSIONAL SERVICES
                                STATEMENT OF WORK

                                      Client Name:    [***]
                                                  ------------------------------
                                      Agreement Number #
                                                        ------------------------
                                      Purchase Order #
                                                      --------------------------
                                      Start Date:
                                                 -------------------------------
                                      Prepared By:
                                                  ------------------------------

BY EXECUTING THIS STATEMENT OF WORK THE UNDERSIGNED PARTIES ACKNOWLEDGE AND
AGREE THAT THE TERMS AND CONDITIONS OF THE AGREEMENT REFERENCED ABOVE SHALL
GOVERN THE SERVICES PERFORMED HEREUNDER.

================================================================================
                             Description of Services
Description of work to be performed by location: [***]

As per BellSouth, the anticipated effort will be: [***]

Description of resources to be utilized: [***]

Rate plan for resources: [***]

<TABLE>
<S>                <C>                      <C>                          <C>                <C>
Cost Estimate: Labor: [***]__________   Travel: $ Actual_________  Other: $___________  Total: $____________
</TABLE>

================================================================================
                     Invoice Predictive Systems Instructions
Submit invoice with valid documentation to:    Copy to:

Name:

Address:

Phone:

Fax:

================================================================================
                           Accepted and Agreed to by:
PREDICTIVE SYSTEMS                       [***]

Signature:                               Signature:
          ---------------------                    -----------------------------

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

Date:                                    Date:
     --------------------------               ----------------------------------

================================================================================

--------------------------------------------------------------------------------
                                  CONFIDENTIAL                     Form 0297-001

--------
*** Represents material that has been redacted pursuant to a request for
    confidential treatment pursuant to Rule 406 under the Securities Act of
    1933, as amended. Omitted material for which confidential treatment has been
    requested has been filed separately with the Securities and Exchange
    Commission.
                                                                   Page 1 of 3

<PAGE>

                                    EXHIBIT A
                              PROFESSIONAL SERVICES
                                STATEMENT OF WORK

                                         Client Name:      [***]
                                                     ---------------------------
                                         Agreement Number #
                                                           ---------------------
                                         Purchase Order #
                                                         -----------------------
                                         Start Date:          11/30/99
                                                    ----------------------------
                                         Prepared By:     [***]
                                                     ---------------------------

BY EXECUTING THIS STATEMENT OF WORK THE UNDERSIGNED PARTIES ACKNOWLEDGE AND
AGREE THAT THE TERMS AND CONDITIONS OF THE AGREEMENT REFERENCED ABOVE SHALL
GOVERN THE SERVICES PERFORMED HEREUNDER.

================================================================================
                             Description of Services

Description of work to be performed by location:

[***]

--------
*** Represents material that has been redacted pursuant to a request for
    confidential treatment pursuant to Rule 406 under the Securities Act of
    1933, as amended. Omitted material for which confidential treatment has been
    requested has been filed separately with the Securities and Exchange
    Commission.

<PAGE>

Assumptions:
------------

To successfully complete the tasks described within the proposed timeline,
Predictive Systems will make the following assumptions:

     o BellSouth Communications Systems [***].

     o Predictive Systems is not responsible for [***].

     o BellSouth personnel will be available for interviews to gather
       information in a timely fashion. Any delays in this will result in
       additional costs.

     o BellSouth will provide the appropriate equipment to facilitate the
       building of the soft copies of the configurations. This will include a
       router, the selected switch, distributed director and a SUN workstation.

Description of resources to be utilized: [***]

Rate plan for resources: [***]
<TABLE>
<CAPTION>
<S>              <C>                   <C>                  <C>                 <C>
Cost Estimate:  Labor: [***]_____  Travel: $__________  Other: $__________  Total: $__________

==================================================================================================================================
                                              Invoice Predictive Systems Instructions

Submit invoice with valid documentation to:                Copy to:

Name:

Address:

Phone:

Fax:

===================================================================================================================================
                                                    Accepted and Agreed to by:

PREDICTIVE SYSTEMS                                   [***]

Signature:                                                    Signature:
          -------------------------------------------                   -------------------------------------------

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

Date:                                                         Date:
     ------------------------------------------------              ------------------------------------------------
===================================================================================================================================
</TABLE>

--------
*** Represents material that has been redacted pursuant to a request for
    confidential treatment pursuant to Rule 406 under the Securities Act of
    1933, as amended. Omitted material for which confidential treatment has been
    requested has been filed separately with the Securities and Exchange
    Commission.

<PAGE>

                                    EXHIBIT A
                              PROFESSIONAL SERVICES
                                STATEMENT OF WORK

                                      Client Name:    [***]
                                                  ------------------------------
                                      Agreement Number #
                                                        ------------------------
                                      Purchase Order #
                                                      --------------------------
                                      Start Date:
                                                 -------------------------------
                                      Prepared By:
                                                  ------------------------------

BY EXECUTING THIS STATEMENT OF WORK THE UNDERSIGNED PARTIES ACKNOWLEDGE AND
AGREE THAT THE TERMS AND CONDITIONS OF THE AGREEMENT REFERENCED ABOVE SHALL
GOVERN THE SERVICES PERFORMED HEREUNDER.

================================================================================
                             Description of Services
Description of work to be performed by location: [***]

[***]

As per BellSouth, the anticipated effort will be: [***]

Description of resources to be utilized: [***]

Rate plan for resources: [***]

<TABLE>
<S>              <C>                          <C>                      <C>                   <C>
Cost Estimate: Labor: [***]__________   Travel: $ Actual_________  Other: $___________  Total: $____________
</TABLE>

================================================================================
                     Invoice Predictive Systems Instructions
Submit invoice with valid documentation to:    Copy to:

Name:

Address:

Phone:

Fax:

================================================================================
                           Accepted and Agreed to by:
PREDICTIVE SYSTEMS                       [***]

Signature:                               Signature:
          ---------------------                    -----------------------------

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

Date:                                    Date:
     --------------------------               ----------------------------------

================================================================================

--------------------------------------------------------------------------------
                                  CONFIDENTIAL                     Form 0297-001

--------
*** Represents material that has been redacted pursuant to a request for
    confidential treatment pursuant to Rule 406 under the Securities Act of
    1933, as amended. Omitted material for which confidential treatment has been
    requested has been filed separately with the Securities and Exchange
    Commission.

                                                                   Page 1 of 3

<PAGE>

                                    EXHIBIT A
                              PROFESSIONAL SERVICES
                                STATEMENT OF WORK

                                      Client Name:    [***]
                                                  ------------------------------
                                      Agreement Number #
                                                        ------------------------
                                      Purchase Order #
                                                      --------------------------
                                      Start Date:
                                                 -------------------------------
                                      Prepared By:
                                                  ------------------------------

BY EXECUTING THIS STATEMENT OF WORK THE UNDERSIGNED PARTIES ACKNOWLEDGE AND
AGREE THAT THE TERMS AND CONDITIONS OF THE AGREEMENT REFERENCED ABOVE SHALL
GOVERN THE SERVICES PERFORMED HEREUNDER.

================================================================================
                             Description of Services
Description of work to be performed by location: [***]

As per BellSouth, the anticipated effort will be: [***]

Description of resources to be utilized: [***]

Rate plan for resources: [***]

<TABLE>
<S>              <C>                          <C>                      <C>                   <C>
Cost Estimate: Labor: [***]__________   Travel: $ Actual_________  Other: $___________  Total: $____________
</TABLE>

================================================================================
                     Invoice Predictive Systems Instructions
Submit invoice with valid documentation to:    Copy to:

Name:

Address:

Phone:

Fax:

================================================================================
                           Accepted and Agreed to by:
PREDICTIVE SYSTEMS                       [***]

Signature:                               Signature:
          ---------------------                    -----------------------------

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

Date:                                    Date:
     --------------------------               ----------------------------------

================================================================================

--------------------------------------------------------------------------------
                                  CONFIDENTIAL                     Form 0297-001

--------
*** Represents material that has been redacted pursuant to a request for
    confidential treatment pursuant to Rule 406 under the Securities Act of
    1933, as amended. Omitted material for which confidential treatment has been
    requested has been filed separately with the Securities and Exchange
    Commission.

                                                                   Page 1 of 3<PAGE>

                                Service Agreement

This Agreement is made as of the 1st day of February 2000 ("Effective Date") by
and between Cisco Systems, Inc. a California corporation, with offices located
at 170 West Tasman, San Jose, CA 95134 and Cisco's Affiliates ("COMPANY") and
Predictive Systems, Inc., a Delaware corporation, with offices located at 1121
Pacific Ave. Santa Cruz, CA 95060 and Predictive Systems Affiliates ("Predictive
Systems").

In consideration of the mutual covenants and promises set forth below, the
parties agree as follows:

1.   Duties and Obligations.

1.1  Predictive Systems agrees to:

     (a)  perform the services ("Services") described in each written statement
          signed by both parties (each a "Work Statement"). All Work Statements
          shall state the Services to be provided, the applicable fee of
          Predictive Systems and such other terms as the parties shall agree.
          The initial Work Statement is set forth in Exhibit A hereto.
     (b)  perform additional services upon execution of subsequent Work
          Statements by authorized representatives of both parties;
     (c)  provide adequate supervision, if applicable, to assure proper
          performance of the Services in accordance with Exhibit A;
     (d)  keep Company advised of the progress of the Services by organizing
          meetings between Company and Predictive Systems at mutually agreed
          upon times and frequencies;
     (e)  permit any representative of Company to review from time to time the
          results of the Services;
     (f)  provide Company with such deliverables, reports, specifications,
          drawings, models, and the like, as are appropriate to the nature of
          the Services and as specified in the appropriate Work Statement;
     (g)  keep records of work performed which Company may review from time to
          time upon reasonable notice to Predictive Systems;
     (h)  ensure that Predictive Systems and its employees comply with Company's
          safety, security and code of conduct regulations;
     (i)  ensure that Predictive Systems and its employees comply with Company's
          requirements regarding, (i)  Proprietary information & Invention
          Agreement for Temporary Employees  and Consultants, and (ii)
          Authorization for Background Check;
     (j)  furnish personnel who are qualified to perform the Services;
     (k)  prior to using any subcontractor not an existing employee or
          contractor of Predictive Systems, obtain Company's written approval of
          use of such subcontractor;
     (l)  execute, for the benefit of Company, an agreement with any
          subcontractor containing provisions of the character, scope and
          purpose of this Agreement,
     (m)  ensure that any employee, contractor, or subcontractor of Predictive
          Systems has the legal right to work in the United States at Company
          and has obtained the proper immigrant status on the United States
          Immigration and Naturalization Services Form I-9, or successor
          documentation;
     (n)  maintain workers' compensation insurance coverage for employees,
          contractors, or subcontractors of Predictive Systems; and
     (o)  comply with all reasonable instructions given by Company in connection
          with the Services.

1.2 Each fully executed Work Statement is hereby incorporated in full into this
Agreement by reference and shall be subject to each of the terms and conditions
of this Agreement.

1.3 Company, may at its sole option and discretion, request the transfer or
replacement of any employee or subcontractor of Predictive Systems assigned to
perform the Services and Predictive Systems shall forthwith comply.

<PAGE>

2.   Representations and Warranties.

2.1  Predictive Systems represents and warrants that:

     (a)  Predictive Systems's performance of the Services and all terms of this
          Agreement will not breach any agreement that Predictive Systems has,
          or will have during the term of the Agreement, with another party and
          there is no other contract or duty on his or her part now in existence
          inconsistent with this Agreement;
     (b)  Predictive Systems has and will obtain non-disclosure, assignment of
          rights and other appropriate agreements with its employees and
          contractors, as applicable and necessary, sufficient to protect
          Company's Confidential Information;
     (c)  to the extent that Predictive Systems's obligations hereunder have
          been subcontracted, Predictive Systems shall remain fully responsible
          for such obligations and will promptly pay any fees and/or charges due
          to such Subcontractor;
     (d)  Services shall comply with Exhibit A; Services are Year 2000 Compliant
          per Company's definition available on the following web site: http//:
          www.ccisco.com; and,
     (e)  the Services will be performed in a professional workmanlike manner
          consistent with industry standards.

2.2 WITHOUT LIMITING THE FOREGOING, PREDICTIVE SYSTEMS MAKES NO EXPRESS OR
IMPLIED REPRESENTATIONS WITH RESPECT TO ITS PERFORMANCE OF THE SERVICES
HEREUNDER OR ANY DELIVERABLES CONTEMPLATED HEREBY, INCLUDING WITHOUT LIMITATION
ANY REPRESENTATION OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.

3. Confidentiality:

3.1 COMPANY expressly acknowledges that the performance of these services will
require Predictive Systems to gain access to COMPANY's confidential and
proprietary network and information assets, and authorizes this access for the
purposes described in the SOW, subject, however, to the Mutual Nondisclosure
Agreement, dated October 5, 1998, between COMPANY and Predictive Systems (the
"NDA").

3.2 By accepting Predictive Systems services, COMPANY assumes any and all
liability for any disclosure of any third-party confidential or proprietary
information assets, or any classified information, arising out of or resulting
from such Services, and agrees to indemnify, defend and hold harmless Predictive
Systems from and against any claim, loss or liability asserted by any person
arising out of or relating to any such disclosure, subject, however, to the NDA.

4. Indemnity.

4.1 Predictive Systems shall defend, and indemnify and hold Company harmless
from and against any and all claims, injuries, damages, obligations,
liabilities, causes of action, judgment or costs including reasonable attorneys'
fees, arising out of or in connection with, either directly or indirectly, any
intentional, negligent, fraudulent or criminal act or omission of Predictive
Systems or its subcontractors in the performance of any Services under this
Agreement, or any other act or omission by or under the direction of the
Predictive Systems or its employees, agents or subcontractors under this
Agreement.

4.2 Company shall defend, and indemnify and hold Predictive Systems harmless
from and against any and all claims, injuries, damages, obligations,
liabilities, causes of action, judgment or costs including reasonable attorneys'
fees, arising out of or in connection with Company's intentional, fraudulent or
criminal use or misuse of any deliverables resulting from Services provided to
Company by Predictive Systems under this agreement.

<PAGE>

4.3 Notification. Company or Predictive Systems shall promptly notify each other
in writing of any claims subject to the indemnifications under Sections 4.1 and
4.2. In the event that any legal actions are taken, copies of all papers in
connection with such action shall be promptly forwarded to the respective party.
Neither party shall , if involved, incur any expenses or make any settlement
without the written consent of the other party.

5. Fees.

5.1 Predictive Systems shall be paid the fixed fees set forth in Exhibit A
attached hereto for Predictive Systems's performance of Services under this
Agreement, and Company will in no event be obligated to pay Predictive Systems
any more than the maximum fee amount stated in Exhibit A.

5.2 Predictive Systems shall submit to Company invoices detailing all the
Services rendered and, assuming timely and satisfactory completion of such
Services, Company shall pay such invoices within thirty (30) days of receipt of
invoice. Such fees are Predictive Systems's sole compensation for rendering
Services to Company. The parties agree that Company is not responsible to
reimburse any costs or expenses incurred by Predictive Systems in performing the
Services unless otherwise agreed to in the applicable Work Statement and/or
Exhibit A.

6. Term.

6.1 This Agreement will commence on the Effective Date and will continue until
the later of (i) December 31, 2000, or (ii) so long as a Work Statement (Exhibit
A) is in effect and has not been completed, unless terminated earlier as
provided in this Agreement ("Initial Term"). This Agreement shall renew month to
month after the Initial Term; provided that either party may prevent such
renewal, with or without cause, by giving the other party notice thirty (30)
days prior to the termination date of the Initial Term of the Agreement.

Termination. Company may terminate this Agreement, in whole or in part, for
convenience upon ten (10) days written notice to the Predictive Systems.
Immediately upon such notice, Predictive Systems will stop all work related to
this Agreement. Company shall pay Predictive Systems within thirty (30) days
receipt of invoice for all services rendered prior to notice of termination.

Further, notwithstanding anything to the contrary, this Agreement may be
terminated by either party for cause in the event of: (a) breach or default by
the other party of a material obligation under this Agreement which is not
remedied within thirty (30) days after written notice in accordance with Section
15; (b) a party files for bankruptcy or becomes an involuntary participant in a
bankruptcy proceeding, if such proceedings are not dismissed within sixty (60)
days after commencement; or, (c) notice of the inability of the other party to
perform due to the existence of an Excusable Delay event which is reasonably
determined by the terminating party to be a continuing condition; or (d) in the
event that any of the Predictive Systems's performance levels as set forth in
Exhibit A falls below ninety-five percent (95%) or falls below ninety percent
(90%) for three consecutive months, or any four (4) non-consecutive months
within a twelve-month period.

7. Insurance.

7.1 As an integral part of this Agreement and prior to initiation of work,
Predictive Systems shall deposit with Company's Risk Management Department
evidence of adequate insurance protection against fortuitous losses in the form
of certificates and/or endorsements (as applicable). The amounts shall be no
less than the amounts specified below, or such other amounts as specified in
advance in writing by Company's Risk Management Department:

     (a)  Workers' Compensation Insurance, in accordance with the provisions of
          the laws or regulations of the nation, state, territory or province
          having jurisdiction over Predictive Systems's employees, and
          Employer's Liability insurance with a minimum limit of liability of
          One Million Dollars ($1,000,000).

<PAGE>

     (b)  Commercial General Liability Insurance, written on an "occurrence"
          basis, including bodily injury, products/completed operations, broad
          form property damage, blanket contractual liability, and contractor's
          liability with a limit of liability not less than Two Million Dollars
          ($2,000,000) combined single limit per occurrence for bodily injury
          and property damage and not less than Three Million Dollars
          ($3,000,000) general aggregate.

     (c)  Business Automobile Liability covering use of all owned, non-owned and
          hired vehicles used in connection with the performance of this
          Agreement with a limit of liability not less than One Million Dollars
          ($1000,000) combined single limit per occurrence for bodily injury and
          property damage.

     (d)  Professional Liability (Errors and Omissions) Insurance with limits of
          liability of not less than One Million Dollars ($1,000,000) per
          occurrence.

7.2 Waiver. Predictive Systems and its insurer(s) agree to waive all rights of
recovery or subrogation which Predictive Systems may have against Company,
except where prohibited by law. Such insurance shall substantially include the
following waiver of subrogation: Predictive Systems and its respective
underwriters hereby waive any and all rights of recovery by way of subrogation
or otherwise against Company, by reason of any loss, claim, action or payment
which might arise out of or in connection with the work performed under this
Agreement

7.3 Additional Insured. Certificates of insurance must include Company, its
subsidiaries, and their respective officers, directors, employees, and agents as
additional insureds for General Liability and Automobile Liability. All
certificates shall provide that the insurer give thirty (30) days written notice
to Company prior to any adverse material change in coverage, cancellation or
non-renewal of coverages. Said notice shall be submitted to Company's Risk
Management Department at 170 W. Tasman Drive, San Jose, CA 95134. Predictive
Systems's insurance is to be primary and shall contain cross liability and
severability of interest provisions, and any insurance carried by Company shall
be excess and non-contributing.

8. Consequential Damages: IN NO EVENT SHALL COMPANY OR PREDICTIVE SYSTEMS BE
LIABLE FOR ANY SPECIAL, INDIRECT, CONSEQUENTIAL, INCIDENTAL, OR EXEMPLARY
DAMAGES INCLUDING WITHOUT LIMITATION, DAMAGES FOR LOSS OF BUSINESS PROFITS, COST
OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, BUSINESS
INTERRUPTIONS, OR LOSS OF INFORMATION, EVEN IF COMPANY OR PREDICTIVE SYSTEMS HAS
BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.

9 Limitation of Liability. NOTWITHSTANDING ANYTHING ELSE IN THIS AGREEMENT OR
OTHERWISE, NEITHER PARTY WILL BE LIABLE WITH RESPECT TO ANY SUBJECT MATTER OF
THIS AGREEMENT UNDER ANY CONTRACT, NEGLIGENCE, STRICT LIABILITY OR OTHER LEGAL
OR EQUITABLE THEORY FOR (I) ANY AMOUNTS IN EXCESS IN THE AGGREGATE OF THE FEES
PAID BY COMPANY TO PREDICTIVE SYSTEMS HEREUNDER DURING THE SIX (6) MONTH PERIOD
PRIOR TO THE DATE THE CAUSE OF ACTION AROSE, OR (II) ANY MATTER BEYOND SUCH
PARTY'S REASONABLE CONTROL.

10. Audit and Payment Adjustment. Predictive Systems agrees to maintain, in
accordance with generally accepted accounting principles, account records
necessary to disclose the basis for any charges, ordinary or extraordinary,
billed to Company under this Agreement, and shall make them available for
examination and audit by Company or its agents prior to, and for a period of two
(2) years after, receipt by Predictive Systems of final payment under this
Agreement. Company will have the right to audit such records during normal
business hours upon 72 hours notice to Predictive Systems.

11. Access. COMPANY expressly authorizes Predictive Systems to gain access,
including without limitation external network access, to COMPANY's computer
network and information systems which is reasonable and necessary for the
purposes described in the SOW, and COMPANY acknowledges that such access shall
be obtained by Predictive Systems with the express permission of COMPANY.

<PAGE>

12. Restrictions Regarding Employees.

12.1 Restrictions Against Solicitation and Hiring. While this agreement is in
effect, and for a period of six months subsequent to the termination of this
agreement, neither Predictive Systems nor Company shall (i) solicit for
employment any of the other party's employees, without the prior written consent
of such other party or (ii) knowingly employ, either directly or indirectly (as
a consultant, independent contractor or otherwise), any of the other party's
employees; provided that any response by an employee of one party to any
advertisement of employment opportunities made by the other party targeted to
the general public shall not be deemed to be a breach of the foregoing
provision.

13.General.

13.1 Notice. Any notice to be given hereunder shall be in writing and addressed
to the applicable party at the address stated above, or such other address as
the party may designate from time to time by written notice in accordance with
this Section. Except as otherwise expressly provided in this Agreement, notices
hereunder shall be deemed given and effective (i) if personally delivered, upon
delivery, (ii) if sent by overnight rapid-delivery service with tracking
capabilities, upon receipt; (iii) if sent by telex, telecopier, or electronic
mail, at such time as the party that sent the notice receives confirmation of
receipt by the applicable method of transmittal, or (iv) if sent by certified or
registered United States mail, within five (5) days of deposit in the mail.

13.2 Severability. If any provision herein shall be held to be invalid or
unenforceable for any reason, such provisions shall, to the extent of such
invalidity or unenforceability, be of no force or effect, but without in any way
affecting the remainder of such provision or any other provision contained
herein, all of which shall continue in full force and effect.

13.3 Assignment. This Agreement shall be binding upon, and inure to the benefit
of, the parties hereto and their respective heirs, successors and assigns;
provided, however, that this Agreement and the rights and obligations hereunder
are not assignable by Predictive Systems without Company's prior written
consent.

13.4 Governing Law. This Agreement and all disputes and suits related thereto
shall be governed, construed, and interpreted in accordance with the laws of the
State of California without regard to conflicts of laws provisions thereof.

13.5 Compliance with Laws. Predictive Systems hereby represents and warrants
that (i) it shall comply with all applicable, local and national laws and
regulations; (ii) this Agreement and all of its terms are in full conformance
and in compliance with such laws; and (iii) it shall not act in any fashion or
take any action which will render Company liable for a violation of the U.S.
Foreign Corrupt Practices Act, which prohibits the offering, giving or promising
to offer or give, directly or indirectly, money or anything of value to any
official of a government, political party or instrumentality thereof in order to
assist it or Company in obtaining or retaining business or in caring out the
Services hereunder. Upon request, Predictive Systems agrees to issue
certificates certifying compliance with any of the aforementioned laws or
regulations as may be applicable to the Software and/or services being furnished
hereunder.

13.6 Independent Contractor. Predictive Systems hereby acknowledges and agrees
that it is an independent contractor to Company and is solely responsible for
all taxes, withholdings, and other similar statutory obligations. Predictive
Systems agrees to defend, indemnify and hold Company harmless from any and all
claims made by any entity on account of an alleged failure by Predictive Systems
to satisfy any such tax or withholding obligations. Predictive Systems
acknowledges and agrees that it is not an employee, agent, a joint venture, or a
partner of Company. Predictive Systems has no authority to act on behalf of or
to enter into any contract, incur any liability or make any representation on
behalf of Company. Predictive Systems will supply all tools and equipment
necessary to perform the Services unless otherwise agreed to in the Agreement.

<PAGE>

13.7 Export Laws and Restrictions. Predictive Systems shall not transmit,
directly or indirectly, any Confidential Information or any technical data
received from or disclosed by Company, nor the direct product thereof, outside
the United States without Company's prior written consent and in accordance with
all export laws and regulations of the United States. Predictive Systems agrees
that it does not intend nor will it, directly or indirectly, export or re-export
any Confidential Information to anyone who Predictive Systems knows or has
reason to know will utilize it in the design, development or production of
nuclear, chemical or biological weapons or to anyone who has been prohibited
from participating in U.S. export transactions by any federal agency of the U.S.
Government.

13.8 No Waiver. No delay or failure by either party to exercise or enforce at
any time, any right or provision of this Agreement shall be considered a waiver
thereof or of such party's right thereafter to exercise or enforce each and
every right and provision of this Agreement. Any waiver of any right hereunder
in a specific circumstance shall not be deemed a waiver of that right in any
other circumstances or a waiver of any other right. A waiver to be valid shall
be in writing but need not be supported by consideration.

13.9 Counterparts. The Agreement may be executed in one or more counterparts,
each of which shall be deemed an original, but all of which shall constitute but
one and the same instruments.

13.10 Excusable Delay. Neither party will be liable for any failure or delay in
performing any of its obligations under this Agreement, that is due to causes
beyond its reasonable control, such as natural catastrophes, governmental acts
or labor strikes or difficulties. Predictive Systems will notify Company
promptly of any factor, occurrence or event that comes to its attention that may
affect or delay Predictive Systems's ability to perform any of its other
obligations hereunder. By way of example, such notices shall be given in the
event of any loss or reassignment of key employees, threat of strike, knowledge
or any allegation that any technology used or to be used in performing
Predictive Systems' obligations would infringe on any third party's technology
rights, significant loss of data, or significant equipment failure.

13.11 Attorney Fees. The prevailing party in any legal action to enforce or
interpret this Agreement shall be entitled to recover reasonable attorney's fees
and costs.

13.12 Amendment. This Agreement may be amended or modified only with the prior
written consent of Authorized Representatives of both parties.

13.13 Entire Agreement. This Agreement and all schedules, exhibits and
attachments hereto constitute the entire agreement between the parties
concerning the subject matter hereof. This Agreement replaces and supersedes any
prior verbal or written understandings, communications, or representations
between the parties.

13.14. Survival. The following provisions shall survive termination or
expiration of this Agreement for whatever reason: Sections 3.1.

<PAGE>

IN WITNESS WHEREOF, the undersigned have caused this Agreement to be executed by
their duly authorized representatives as of the date written above:

Cisco Systems, Inc.

________________________________________________________________________________
Signature                          Title                                Date

Predictive Systems, Inc.

________________________________________________________________________________
Signature                          Title                                Date

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