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                                                               EXHIBIT 10.5

                                 AMENDMENT NO. 1
                        TO EXECUTIVE RETENTION AGREEMENT

      This Amendment No. 1 to Executive Retention Agreement made as of October
16, 1998 (the "Agreement") between ePresence, Inc. (formerly Banyan Systems
Incorporated), a Massachusetts corporation (the "Company"), and Anthony J.
Bellantuoni (the "Executive"), is effective as of the 26th day of July, 2001.
Capitalized terms used and not otherwise defined herein shall have the
respective meanings ascribed to them in the Agreement.

1. The parties hereto agree that the Agreement is hereby amended as follows:

            A new Section 3.3 shall hereby be inserted:

            "3.3 Loans. (a) As of the date of this Amendment, the principal
            amount of any outstanding loans to the Executive from the Company
            made for the purpose of satisfying the Executive's federal, state
            and local income tax obligations with respect to the issuance or
            vesting of restricted shares plus accrued interest, shall be
            consolidated into one loan (the "Consolidated Loan"). The
            Consolidated Loan, and any future loans to the Executive by the
            Company for the foregoing stated purpose ("Future Loan"), shall bear
            simple interest at the applicable Federal rate and shall be due and
            payable 90 days after the termination of the Executive's employment
            with the Company subject to the forgiveness and Change in Control
            provisions set forth below in subsections 3.3(b) and 3.3(c),
            respectively.

            (b) Subject to the Executive being employed by the Company on an
            annual applicable anniversary date, beginning with (i) July 26, 2002
            with respect to the Consolidated Loan; and (ii) the date 12 months
            from the making of any Future Loan, if any, 20% of the Consolidated
            Loan and 20% of any Future Loan, as the case may be, plus accrued
            interest on each such loan as of such date shall be forgiven.

            (c) If the Change in Control Date occurs during the Term, the
            aggregate outstanding principal amount of the Consolidated Loan and
            any Future Loan plus accrued interest on each such loan as of the
            Change in Control Date shall be forgiven.

            (d) That with respect to any amounts forgiven on an anniversary date
            pursuant to subsection 3.3(b) above or as a result of a change in
            control pursuant to subsection 3.3(c) above, as the case may be, a
            gross-up amount to satisfy applicable federal, state and local
            income taxes on such debt forgiveness income to the Executive shall
            be included."

2. To the extent any provision of this Amendment is inconsistent with any
provision of the Agreement, such provision of the Agreement is hereby modified
and superseded by the terms hereof. Any term of the Agreement not so modified or
superseded shall remain in full force and effect.
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3. This Amendment may be executed in counterparts, each of which shall be deemed
to be an original but both of which shall constitute one and the same
instrument.

      EXECUTED as of the date first set forth above.

                                 COMPANY:

                                 ePRESENCE, INC.

                                 By: /s/ William P. Ferry
                                    ----------------------------------
                                    Name:  William P. Ferry
                                    Title: Chief Executive

                                 EXECUTIVE:

                                 /s/ Anthony J. Bellantuoni
                                 -------------------------------------
                                 Anthony J. Bellantuoni

                                       2<PAGE>

                                                               EXHIBIT 10.6

                                 AMENDMENT NO. 1
                              TO EMPLOYMENT LETTER

      This Amendment No. 1 to the Employment Letter dated January 15, 1999 (the
"Agreement") between ePresence, Inc. (formerly Banyan Systems Incorporated), a
Massachusetts corporation (the "Company"), and Scott G. Silk (the "Employee"),
is effective as of the 26th day of July 2001. Capitalized terms used and not
otherwise defined herein shall have the respective meanings ascribed to them in
the Agreement.

1. The parties hereto agree that the Agreement is hereby amended as follows:

      A new Section regarding Loans shall hereby be inserted in Section H -
      "Other" - immediately above the definition Section:

            "Loans. (a) As of the date of this Amendment, the principal amount
            of any outstanding loans to the from the Company made for the
            purpose of satisfying the Executive's federal, state and local
            income tax obligations with respect to the issuance or vesting of
            restricted shares plus accrued interest, shall be consolidated into
            one loan (the "Consolidated Loan"). The Consolidated Loan, and any
            future loans to the Executive by the Company for the foregoing
            stated purpose ("Future Loan"), shall bear simple interest at the
            applicable Federal rate and shall be due and payable 90 days after
            the termination of the Executive's employment with the Company
            subject to the forgiveness and Change in Control provisions set
            forth below in subsections 3.3(b) and 3.3(c), respectively.

            (b) Subject to the Executive being employed by the Company on an
            annual applicable anniversary date, beginning with (i) July 26, 2002
            with respect to the Consolidated Loan; and (ii) the date 12 months
            from the making of any Future Loan, if any, 20% of the Consolidated
            Loan and 20% of any Future Loan, as the case may be, plus accrued
            interest on each such loan as of such date shall be forgiven.

            (c) If the Change in Control Date occurs during the Term, the
            aggregate outstanding principal amount of the Consolidated Loan and
            any Future Loan plus accrued interest on each such loan as of the
            Change in Control Date shall be forgiven.

            (d) That with respect to any amounts forgiven on an anniversary date
            pursuant to subsection (b) above or as a result of a change in
            control pursuant to subsection (c) above, as the case may be, a
            gross-up amount to satisfy applicable federal, state and local
            income taxes on such debt forgiveness income to the Executive shall
            be included."

2. To the extent any provision of this Amendment is inconsistent with any
provision of the Agreement, such provision of the Agreement is hereby modified
and superseded by the terms hereof. Any term of the Agreement not so modified or
superseded shall remain in full force and effect.
<PAGE>

3. This Amendment may be executed in counterparts, each of which shall be deemed
to be an original but both of which shall constitute one and the same
instrument.

      EXECUTED as of the date first set forth above.

                                 COMPANY:

                                 ePRESENCE, INC.

                                 By:/s/ William P. Ferry
                                    ---------------------------------
                                     Name:  William P. Ferry
                                     Title: Chief Executive

                                 EXECUTIVE:

                                 /s/ Scott G. Silk
                                 ------------------------------------
                                 Scott G. Silk

                                       2<PAGE>

                                                                    EXHIBIT 10.7

                               AMENDMENT NO. 1 TO
                                PLEDGE AGREEMENT

            This Amendment No. 1 to the Pledge Agreements made as of May 5, 2000
and October 16, 2000 (collectively the "Pledge Agreements") between Richard M.
Spaulding, an individual residing at 66 Solon Street, Newton MA 02161
("Pledgor") and ePresence, Inc., a Massachusetts Corporation, with its principal
place of business located at 120 Flanders Road, Westboro, MA 01581 ("Pledgee")
is effective as of the 26th day of July, 2001. Capitalized Terms used and not
otherwise defined herein shall have the respective meaning ascribed to them in
the Pledge Agreement.

                                   WITNESSETH:

            WHEREAS, the Pledgor has issued a secured promissory note dated May
5, 2000 (the "May 2000 Note") in the original principal amount of Fifty Two
Thousand Four Hundred Sixty Dollars and Seventy Four Cents ($52,460.74) payable
to the Pledgee, pursuant to its terms; and

            WHEREAS, the Pledgor has issued a secured promissory note dated
October 16, 2000 (the "October 2000 Note") in the original principal amount of
Forty-Three Thousand Nine Hundred Thirty Nine Dollars and Thirty Two Cents
($43,939.32) payable to the Pledgee, pursuant to its terms; and

            WHEREAS, the May 2000 Note and the October 2000 Note have been
consolidated into a Promissory note dated July 26, 2001 (the "Consolidated
Note") in the original principal amount of One Hundred One Thousand Seven
Hundred Twenty Seven Dollars and Eighty Four Cents ($101,727.84) payable to the
Pledgee, pursuant to its terms; and

            WHEREAS, the parties desire to amend the Pledge Agreements pursuant
to Section 15 of them.

            NOW THEREFORE, the parties hereto agree and acknowledge that the
foregoing recitals are true and correct and to the following:

            1. That all references to the term Note in the Pledge Agreements
shall hereby be replaced with the term Consolidated Note in the Pledge
Agreements.

            2. The Pledgor hereby confirms that the representations of the
Pledgor contained in Section 4 of the Pledge Agreements are true and correct on
and as of the date hereof as if made on the date hereof.

            3. Except as specifically amended hereby, all terms and conditions
of the Pledge Agreements will continue in full force and effect in accordance
with its terms.

            4. This Amendment may be executed in counterparts, each of which
shall be deemed to be an original but both of which shall constitute one and the
same instrument.

            Executed under seal as of the date first above written:

Pledgor:                                 Pledgee:

/s/ Richard M. Spaulding                 /s/ William P. Ferry
---------------------                    --------------------
Richard M. Spaulding                     By:
                                         Its:

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