<PAGE>
NOTICE OF GUARANTEED DELIVERY
FOR
TENDER OF SHARES OF COMMON STOCK
OF
CONVERGENT GROUP CORPORATION
(NOT TO BE USED FOR SIGNATURE GUARANTEES)
THE OFFER AND WITHDRAWAL RIGHTS WILL EXPIRE AT 12:00 MIDNIGHT, NEW YORK CITY
TIME,
ON MONDAY, NOVEMBER 27, 2000, UNLESS THE OFFER IS EXTENDED.
This Notice of Guaranteed Delivery, or one substantially in the form of this
notice, must be used to accept the offer to purchase made by Convergent
Acquisition Sub, Inc., a wholly owned subsidiary of Convergent Holding
Corporation, which in turn is a wholly owned subsidiary of Schlumberger
Technology Corporation, for shares of common stock of Convergent Group
Corporation if (1) certificates evidencing shares are not immediately available,
(2) certificates evidencing shares and all other required documents cannot be
delivered to Citibank, N.A., as Depositary, prior to the Expiration Date (as
defined in "The Tender Offer-Terms of Our Offer; Expiration Date" of our Offer
to Purchase, dated October 27, 2000) or (3) the procedure for delivery by
book-entry transfer cannot be completed on a timely basis. This Notice of
Guaranteed Delivery may be delivered by overnight courier, by hand or by mail or
transmitted by telegram or facsimile transmission to the Depositary. See "The
Tender Offer--Procedures for Accepting Our Offer and Tendering Shares" of our
Offer to Purchase.
The Depositary for the offer is:
CITIBANK, N.A.
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BY OVERNIGHT COURIER: BY HAND: BY MAIL:
Citibank, N.A. Citibank, N.A. Citibank, N.A.
915 Broadway, 5th Floor Corporate Trust Window P.O. Box 685
Old Chelsea
New York, NY 10010 111 Wall Street, 5th Floor Station
New York, NY 10113 New York, NY 10043
BY FACSIMILE TRANSMISSION:
(212) 505-2248
CONFIRM BY TELEPHONE:
(800) 270-0808 (toll-free)
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DELIVERY OF THIS NOTICE OF GUARANTEED DELIVERY TO AN ADDRESS OTHER THAN AS
SET FORTH ABOVE, OR TRANSMISSION OF INSTRUCTIONS VIA FACSIMILE TRANSMISSION
OTHER THAN AS SET FORTH ABOVE, WILL NOT CONSTITUTE A VALID DELIVERY.
Certificates representing shares must be received by the Depositary within
three trading days after the date of the execution of this Notice of Guaranteed
Delivery.
This form is not to be used to guarantee signatures. If a signature on a
Letter of Transmittal is required to be guaranteed by an eligible institution
under the instructions thereto, the signature guarantee must appear in the space
provided in the signature box on the Letter of Transmittal.
<PAGE>
The undersigned hereby tenders to Convergent Acquisition Sub, Inc. upon the
terms and subject to the conditions set forth in the Offer to Purchase, dated
October 27, 2000, and the related Letter of Transmittal, receipt of each of
which is hereby acknowledged, the number of shares specified below pursuant to
the guaranteed delivery procedure described in "The Tender Offer--Procedures for
Accepting Our Offer and Tendering Shares" of the Offer to Purchase.
If the offer is terminated, the shares tendered pursuant to the offer will
be returned to the tendering holders promptly (or, in the case of tendered by
book-entry transfer, the book-entry tendered shares will be credited to the
account maintained at DTC from which the book-entry tendered shares were
delivered).
The undersigned understand(s) that payment by the Depositary for shares
tendered and accepted for payment pursuant to the offer will be made only after
timely receipt by the Depositary of (1) certificates representing shares and a
properly completed and duly executed Letter of Transmittal (or a manually signed
facsimile thereof) with respect to such shares with any required signature
guarantees and any other documents required by the Letter of Transmittal or
(2) a book-entry confirmation of the transfer of the undersigned's shares into
the Depositary's account at DTC and a properly transmitted Agent's Message.
All authority conferred or agreed to be conferred by this Notice of
Guaranteed Delivery shall not be affected by, and shall survive, the death or
incapacity of the undersigned, and every obligation of the undersigned under
this Notice of Guaranteed Delivery shall be binding upon the heirs, executors,
administrators, trustees in bankruptcy, personal and legal representatives,
successors and assigns of the undersigned.
________________________________________________________________________________
Number of Shares
________________________________________________________________________________
Certificate Nos. (If Available)
/ / Check this box if shares will be delivered by book-entry transfer:
/ / Check this box if you are tendering a common stock certificate issued prior
to July 24, 2000.
/ / Check this box if you are tendering a common stock certificate issued on or
after July 24, 2000.
/ / Check this box if you are tendering a preferred stock certificate.
Name of Eligible Institution: __________________________________________________
Account No.: ___________________________________________________________________
________________________________________________________________________________
Name(s) of Holders
________________________________________________________________________________
Street Address
________________________________________________________________________________
City, State and Zip Code
________________________________________________________________________________
Area Code and Telephone No.
________________________________________________________________________________
Signature(s) of Holder(s)
________________________________________
Date
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<PAGE>
This Notice of Guaranteed Delivery must be signed by the holder(s) exactly
as name(s) appear(s) on certificate(s) for the shares or, if tendered by a
participant in DTC, exactly as the participant's name appears on a security
position listing as the owner of the shares, or by person(s) authorized to
become holder(s) by endorsements and documents transmitted with the Notice of
Guaranteed Delivery. If signature is by a trustee, executor, administrator,
guardian, attorney-in-fact, officer of a corporation or other person acting in a
fiduciary or representative capacity, such person must provide the following
information:
PLEASE PRINT NAME(S) AND ADDRESS(ES):
________________________________________________________________________________
Name(s) of Holders
________________________________________________________________________________
Capacity
________________________________________________________________________________
Street Address
________________________________________________________________________________
City, State and Zip Code
DO NOT SEND CERTIFICATES WITH THIS FORM. CERTIFICATES SHOULD BE SENT TO THE
DEPOSITARY TOGETHER WITH A PROPERLY COMPLETED AND DULY EXECUTED LETTER OF
TRANSMITTAL.
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<PAGE>
GUARANTEE
(NOT TO BE USED FOR SIGNATURE GUARANTEE)
The undersigned, a recognized member of the Medallion Signature Guarantee
Program or any other "eligible guarantor institution," as such term is defined
in Rule 17Ad-15 promulgated under the Securities Exchange Act of 1934, as
amended (the "Exchange Act"), (1) represents that the above named persons are
deemed to own the shares tendered hereby, (2) represents that the tender
complies with the rules of the Exchange Act, and (3) guarantees to deliver to
the Depositary, certificates evidencing the shares tendered hereby, in proper
form for transfer, with delivery of a Letter of Transmittal (or facsimile
thereof) properly completed and duly executed, and any other required documents,
or confirmation of book-entry transfer of such shares into the Depositary's
account at The Depository Trust Company along with an Agent's Message, all
within three trading days of the date of this guarantee.
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Name of Firm Authorized Signature
Street Address Name
City, State and Zip Code Title
Telephone Number Date
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