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                         [LETTERHEAD OF ePresence, Inc.]

                                                                   Exhibit 10.58

                                 ePresence, Inc.
                            1992 STOCK INCENTIVE PLAN

                      NON-STATUTORY STOCK OPTION AGREEMENT
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         1. Grant of Option. ePresence, Inc., a Massachusetts corporation (the
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"Company"), hereby grants to Scott Silk (the "Optionee") an option, pursuant to
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the Company's 1992 Stock Incentive Plan (the "Plan"), to purchase an aggregate
of 75,000 shares of Common Stock ("Common Stock") of the Company at a price of
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$3.08 per share, purchasable as set forth in and subject to the terms and
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conditions of this option and the Plan. The date of grant of this option is July
26, 2001. Except where the context otherwise requires, the term "Company" shall
include the parent and all present and future subsidiaries of the Company as
defined in Sections 424 (e) and 424 (f) of the Internal Revenue Code of 1986, as
amended or replaced from time to time (The "Code").

         2. Non-Statutory Stock Option. This option is not intended to qualify
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as an incentive stock option within the meaning of Section 422 of the Code.

         3. Exercise of Option and Provisions for Termination.
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         a. Vesting Schedule. Except as otherwise provided in this Agreement,
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this option may be exercised prior to the tenth anniversary of the date of grant
(hereinafter the "Expiration Date") in installments as to not more than the
number of shares set forth in the table below during the respective installment
periods set forth in the table below.

                                                   Number of Shares as to
                    Exercise Period                which Option is Exercisable
                    ---------------                ---------------------------

                    Prior to 12 months after                  -0-
                    the date of grant.

                    From and after 12 months                 -33%-
                    after the date of grant but
                    prior to 24 months after
                    the date of grant.

                    From and after 24 months                 -66%-
                    after the date of grant but
                    prior to 36 months after
                    the date of grant.

                    From and after 36 months                -100%-
                    after the date of grant.

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The right of exercise shall be cumulative so that if the option is not exercised
to the maximum extent permissible during any exercise period, it shall be
exercisable, in whole or in part, with respect to all shares not so purchased at
any time prior to the Expiration Date or the earlier termination of this option.
This option may not be exercised at any time on or after the Expiration Date,
except as otherwise provided in Section 3 (e) below.

                b. Exercise Procedure. Subject to the conditions set forth in
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this Agreement, this option shall be exercised by the Optionee's delivery of
written notice of exercise to the Treasurer of the Company, specifying the
number of shares to be purchased and the purchase price to be paid therefor and
accompanies by payment in full in accordance with Section 4. Such exercise shall
be effective upon receipt by the Treasurer of the Company of such written notice
together with the required payment. The Optionee may purchase less than the
number of shares covered hereby, provided that no partial exercise of this
option may be for any fractional share or for fewer than ten whole shares.

                c. Continuous Relationship with the Company Required. Except as
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otherwise provided in this Section 3, this option may not be exercised unless
the Optionee, at the time he or she exercises this option, is, and has been at
all times since the date of grant of this option, an employee, officer or
director of, or consultant or advisor to, the Company (an "Eligible Optionee").

                d. Termination of Relationship with the Company. If the Optionee
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ceases to be an Eligible Optionee for any reason, then, except as provided in
paragraphs (e) and (f) below, the right to exercise this option shall terminate
3 months after such cessation (but in no event after the Expiration Date),
provided that this option shall be exercisable only to the extent that the
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Optionee was entitled to exercise this option on the date of such cessation.
Notwithstanding the foregoing, if the Optionee, prior to the Expiration Date,
materially violates the non-competition or confidentiality provisions of any
employment contract, confidentiality and nondisclosure agreement or other
agreement between the Optionee and the Company, the right to exercise this
option shall terminate immediately upon written notice to the Optionee from the
Company describing such violation.

                e. Exercise Period Upon Death or Disability. If the Optionee
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dies or becomes disabled (within the meaning of Section 22 (e) (3) of the Code)
prior to the Expiration Date while he or she is an Eligible Employee, or if the
Optionee dies within three months after the Optionee ceases to be an Eligible
Optionee (other than as the result of a termination of such relationship by the
Company for "cause" as specified in paragraph (f) below, this option shall be
exercisable, within the period of one year following the date of death or
disability of the Optionee (whether or not such exercise occurs before the
Expiration Date), by the Optionee or by the person to whom this option is
transferred by will or the laws of descent and distribution, provided that this
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option shall be exercisable only to the extent that this option was exercisable
by the Optionee on the date of his or her death or disability. Except as
otherwise indicated by the context, the term "Optionee", as used in this option,
shall be deemed to include the estate of the

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Optionee or any person who acquires the right to exercise this option by bequest
or inheritance or otherwise by reason of the death of the Optionee.

                f. Discharge for Cause. If the Optionee, prior to the Expiration
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Date, ceases his or her relationship with the Company because such relationship
is terminated by the Company for "cause" (as defined below), the right to
exercise this option shall terminate immediately upon such cessation. "Cause"
shall mean willful misconduct by the Optionee or willful failure to perform his
or her responsibilities in the best interests of the Company (including, without
limitation, breach by the Optionee of any provision of any employment,
consulting, advisory, nondisclosure, non-competition or other similar agreement
between the Optionee and the Company), as determined by the Company, which
determination shall be conclusive.

         4.     Payment of Purchase Price.
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                a. Method of Payment. Payment of the purchase price for shares
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purchase upon exercise of this option shall be made by delivery of cash or check
in an amount equal to the exercise price of such options or, with the prior
consent of the Company (which may be withheld in its sole discretion), by (A)
delivery of shares of Common Stock owned by the Optionee for at least six
months, valued at their fair market value, as determined pursuant to (b) below,
(B) delivery of a promissory note of the Optionee to the Company on terms
determined by the Board, (C) delivery of an irrevocable undertaking by a broker
to deliver promptly to the Company sufficient funds to pay the exercise price or
delivery of irrevocable instructions to a broker to deliver promptly to the
Company cash or a check sufficient to pay the exercise price, (D) payment of
such other lawful consideration as the Board may determine, or (E) any
combination of the foregoing.

                b. Valuation of Shares or Other Non-Cash Consideration Tendered
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in Payment of Purchase Price. For the purchase hereof, the fair market value of
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any share of the Company's Common Stock or other non-cash consideration which
may be delivered to the Company in exercise of this option shall be determined
in good faith or in the manner determined by the Board of Directors of the
Company from time to time.

                c. Delivery of Shares Tendered in Payment of Purchase Price. If
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the Optionee exercises this option by delivery of shares of Common Stock of the
Company, the certificate or certificates representing the shares of Common Stock
of the Company to be delivered shall be duly executed in blank by the Optionee
or shall be accompanies by a stock power duly executed in blank suitable for
purposes of transferring such shares to the Company. Fractional shares of Common
Stock of the Company will not be accepted in payment of the purchase price of
shares acquired upon exercise of this option.

                d. Restrictions on Use of Option Stock. Notwithstanding the
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foregoing, no shares of Common Stock of the Company may be tendered in payment
of the purchase price of shares purchased upon exercise of this option is the
shares to be so tendered were acquired within six months before the date of such
tender.

         5.     Delivery of Shares; Compliance with Securities Laws, etc.
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                a. General. The Company will not be obligated to deliver any
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shares of Stock pursuant to the Plan or to remove restriction from shares
previously delivered under the Plan (i) until all conditions of the option have
been satisfied or removed, (ii) until, in the opinion of the Company's counsel,
all applicable federal and state laws and regulations have been complied with,
(iii) if the outstanding Stock is at the time listed on any stock exchange,
until the shares to be delivered have been listed or authorized to be listed on
such exchange upon official notice of notice of issuance, and (iv) until all
other legal matters in connection with the issuance and delivery of such shares
have been approved by the Company's counsel.

                b. Listing, Qualification, etc. This option shall be subject to
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the requirements that if, at any time, counsel to the Company shall determine
that the listing, registration or qualification of the shares subject hereto
upon any securities exchange or under any state or federal law, or the consent
of approval of any governmental or regulatory body, or that the disclosure of
non-public information or the satisfaction of any other condition is necessary
as a condition of, or in connection with, the issuance or purchase of shares
hereunder, this option may not be exercised, in whole or in part, unless such
listing, registration, qualification, consent or approval, disclosure or
satisfaction of such other condition shall have been effected or obtained on
terms acceptable to the Board of Directors. Nothing herein shall be deemed to
require the Company to apply for, effect or obtain such listing, registration,
qualification or disclosure, or to satisfy such other condition.

         6.     Non transferability of Option. This option is personal and no
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rights granted hereunder may be transferred, assigned, pledged or hypothecated
in any way (whether by operation of law or otherwise) nor shall any such rights
be subject to execution, attachment or similar process, except that this option
may be transferred (i) by will or the laws of descent and distribution or (ii)
pursuant to a qualified domestic relations order as defined in Section 414 (p)
of the Code. Upon any attempt to transfer, assign, pledge, hypothecate or
otherwise dispose of this option or of such rights contrary to the provisions
hereof, or upon the levy of any attachment or similar process upon this option
or such rights, this option and such rights shall, at the election of the
Company, become null and void.

         7.     No Special Employment or Similar Rights. Nothing contained in
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the Plan or this Option shall be construed or deemed by any person under any
circumstances to bind the Company to continue the employment or other
relationship of the Optionee with the Company for the period within which this
option may be exercised. The Company expressly reserves the right at any time to
dismiss the Optionee free from any liability or claim under the Plan, except as
otherwise expressly provided in this Agreement.

         8.     Rights as a Shareholder. The Optionee shall have no rights as a
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shareholder with respect to any shares which may be purchased by exercise of
this option (including, without limitation, any rights to receive dividends or
non-cash distributions with respect to such shares) unless and until a
certificate representing such shares is duly issued and delivered to the
Optionee. No adjustment shall be made for dividends or other rights for which
the record date is prior to the date such stock certificate is issued.

         9.     Adjustment Provisions. In the event that the Board, in its sole
                ----------------------
discretion, determines that any stock dividend, extraordinary cash dividend,
recapitalization, reorganization, merger, consolidation, split-up, spin-off,
combination or other similar transaction affects the Common Stock such that an
adjustment is required in order to preserve the benefits or potential benefits
intended to be made available under the Plan, then the Board shall equitably
adjust

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either or both (i) the number and kind of shares subject to this option, and
(iii) the award, exercise or conversion price with respect to the foregoing, and
if considered appropriate, the Board may make provision for a cash payment with
respect to this option, provided that the number of shares subject to this
option shall always be a whole number.

         10.    Mergers, Consolidation, Distributions, Liquidations, etc. In the
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event of a consolidation, merger or other reorganization in which all of the
outstanding shares of Common Stock are exchanged for securities, cash or other
property of any other corporation or business entity (as "Acquisition") or in
the event of a liquidation of the Company, the Board of Directors of the
Company, of the board of directors of any corporation assuming the obligations
of the Company, may, in its discretion, take any one or more of the following
actions as to this option: (i) provide that this option shall be assumed, or a
substantially equivalent option shall be substituted, by the acquiring or
succeeding corporation (or an affiliate thereof) on such terms as the Board
determines to be appropriate, (ii) upon written notice to the Optionee, provide
that if unexercised, this option will terminate immediately prior to the
consummation of such transaction unless exercised by the Optionee within a
specified period following the date of such notice, (iii) in the event of an
Acquisition under the terms of which holders of the Common Stock of the Company
will receive upon consummation thereof a cash payment for each share surrendered
in the Acquisition (the "Acquisition Price"), make or provide for a cash payment
to the Optionee equal to the difference between (A) the Acquisition Price times
the number of shares of Common Stock subject to outstanding options (to the
extent then exercisable at prices not in excess of the Acquisition Price) and
(B) the aggregate exercise price of all such outstanding options in exchange for
the termination of such options, and (iv) provide that all or any outstanding
options shall become exercisable or realizable in full prior to the effective
date of such Acquisition.

         11.    Withholding Taxes. The Company's  obligation to deliver shares
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upon the exercise of this option shall be subject to the Optionee's satisfaction
of all applicable federal, state and local income and employment tax withholding
requirements. The Optionee shall pay to the Company, or make provision
satisfactory to the Board for payment of, any taxes required by law to be
withheld in respect of options under the Plan no later than the date of the
event creating the tax liability. In the Board's discretion, and subject to such
conditions as the Board may establish, such tax obligations may be paid in whole
or in part in shares of Common Stock, including shares retained from the option
creating the tax obligation, valued at their fair market value. The Company may,
to the extent permitted by law, deduct any such tax obligations from any payment
of any kind otherwise due to the Optionee.

         12.    Miscellaneous.
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         (a)    The Board may amend, modify or terminate any outstanding option,
including substituting therefor another option of the same or a different type,
changing the date of exercise or realization, provided that the Optionee's
consent to such action shall be required unless the Board determines that the
action, taking into account any related action, would not materially and
adversely affect the Optionee. The Board may at any time accelerate the time at
which all or any part of an Option may be exercised.

         b)     All notices under this option shall be mailed or delivered by
hand to the parties at their respective addresses set forth beneath their names
below or at such other address as may be designated in writing by either of the
parties to one another.

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         (c) This option shall be governed by and construed in accordance with
the laws of the Commonwealth of Massachusetts.

                                ePresence, Inc.



                                By:  /s/ Richard M. Spaulding
                                    --------------------------------------------
                                         Richard M. Spaulding

                                Title:   Vice President, Chief Financial Officer

                                Address: 120 Flanders Road
                                         Westboro, Massachusetts  01581

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                              OPTIONEE'S ACCEPTANCE

The undersigned hereby accepts the foregoing option and agrees to the terms and
conditions thereof. The undersigned hereby acknowledges receipt of a copy of the
Company's 1992 Stock Incentive Plan.

                                        OPTIONEE


                                               /s/ S.G. Silk
                                        ----------------------------------------

                                        Address:   S.G. Silk
                                                 -------------------------------

                                                   30 Partridge Lane
                                                 -------------------------------
                                                   Boxford, MA 01921

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