<PAGE>

                                                                   Exhibit 10.25

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THE SECURITIES REFERENCED HEREIN HAVE NOT BEEN REGISTERED UNDER THE SECURITIES
ACT OF 1933, AS AMENDED, OR ANY STATE SECURITIES LAWS. THEY MAY NOT BE SOLD OR
OFFERED FOR SALE IN THE ABSENCE OF AN EFFECTIVE REGISTRATION STATEMENT UNDER
SAID ACT AND ANY APPLICABLE STATE SECURITIES LAWS OR THE AVAILABILITY OF AN
EXEMPTION FROM REGISTRATION UNDER SAID ACT AND APPLICABLE STATE SECURITIES LAWS.
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                            SUBSCRIPTION AGREEMENT
                           To Purchase Common Stock
                                      Of
                        STRATEGIC SOLUTIONS GROUP, INC.
                        -------------------------------
                           (a Delaware Corporation)

     THIS SUBSCRIPTION AGREEMENT ("Agreement") is made as of April 3, 2001, by
and between THOMAS STONE ("PURCHASER"), and STRATEGIC SOLUTIONS GROUP, INC., a
Delaware corporation ("SELLER").

                                  WITNESSETH

     WHEREAS, SELLER desires to obtain additional working capital through the
sale and issuance of "Units". As used in this Agreement, a "Unit" means 50,000
shares of the common voting stock, par value $0.0001 of SELLER ("Common Stock"),
and a Convertible Subordinated Debenture made payable to the PURCHASER for the
principal amount of Twenty-Five Thousand Dollars ($25,000), bearing interest at
a rate of ten percent (10%) per annum, and with the outstanding principal
balance convertible into Common Stock at a conversion price of $.10 per share
("Debenture").

     WHEREAS, SELLER has offered to sell, and PURCHASER desires to acquire Units
in accordance with the terms and conditions of this Agreement.

     NOW, THEREFORE, in consideration of the mutual undertakings herein and
other good and valuable consideration, the sufficiency of which is hereby
acknowledged, the parties hereto do hereby agree as follows:

     Section 1.  Purchase and Sale of Units.  SELLER hereby agrees to sell to
                 --------------------------
PURCHASER and PURCHASER hereby agrees to purchase, ten (10) Units, in exchange
for the sum of Two Hundred Fifty Thousand Dollars ($250,000) ("Purchase Price"),
and upon the terms and conditions described herein. Upon receipt of the Purchase
Price and the below-defined Accredited Investor Certificate, SELLER will (i)
execute and deliver a Debenture for the principal amount corresponding to the
number of Units purchased as defined above, and (ii) instruct its transfer agent
to issue and deliver a certificate representing the corresponding number of
shares of Common Stock to PURCHASER or its nominee. The PURCHASER's rights,
duties and obligations in connection with the Units are further defined in
certain Registration Rights Agreement, Security Agreement, and letter agreement
between the parties of even date herewith.

     Section 2.  Payment of Purchase Price.  The Purchase Price will be payable
                 -------------------------
by the PURCHASER in installments ("Installments") as follows:
<PAGE>

     (a)    One Hundred Thousand Dollars ($100,000) to be paid by PURCHASER
            simultaneously with execution of this Agreement;

     (b)    One Hundred Thousand Dollars ($100,000) to be paid by PURCHASER on
            or before that date which is thirty (30) calendar days from the date
            of this Agreement; and

     (c)    Fifty Thousand Dollars ($50,000) to be paid by PURCHASER on or
            before that date which is sixty (60) calendar days from the date of
            this Agreement.

     Section 3.  Partial Issuance and Delivery of Units.  Notwithstanding the
                 --------------------------------------
terms of Section 1 of this Agreement to the contrary, upon the payment of each
Installment, PURCHASER shall be entitled to receive, and the SELLER hereby
agrees to issue and deliver, a corresponding number of Units.

     Section 4.  Purchaser Representations and Warranties.  PURCHASER hereby
                 ----------------------------------------
acknowledges, represents and warrants to, and agrees with, SELLER as follows:

            (a)  "Accredited Investor"; Resale Restrictions.
                  -----------------------------------------

                 (i)     The PURCHASER is an "accredited investor" as that term
     is defined in Regulation D promulgated under the Securities Act of 1933.
     The PURCHASER will accurately complete and return the Accredited Investor
     Certificate attached hereto as Appendix A.
                                    ----------

                 (ii)    The PURCHASER is purchasing the Units for the
     PURCHASER's own account, for investment, and not with a view to, or for
     offer or sale in connection with, any distribution thereof in violation of
     the Securities Act.

                 (iii)   The Debenture and the certificates representing the
     Common Stock will bear a legend substantially as follows:

          [THIS CONVERTIBLE SUBORDINATED DEBENTURE AND THE SHARES OF COMMON
          STOCK ISSUABLE UPON CONVERSION] [THE SHARES OF COMMON STOCK
          REPRESENTED HEREBY] HAVE NOT BEEN REGISTERED UNDER THE UNITED STATES
          SECURITIES ACT OF 1933, AS AMENDED (THE "SECURITIES ACT"), AND MAY NOT
          BE OFFERED OR SOLD EXCEPT PURSUANT TO REGISTRATION UNDER THE
          SECURITIES ACT OR PURSUANT TO AN AVAILABLE EXEMPTION FROM
          REGISTRATION. THE ISSUER WILL REFUSE TO REGISTER ANY TRANSFER OF SUCH
          SECURITIES NOT MADE IN ACCORDANCE WITH THE SECURITIES ACT AND MAY
          REQUIRE, AS A CONDITION TO ANY REGISTRATION OF TRANSFER, AN OPINION OF
          COUNSEL, A CERTIFICATE OR SUCH OTHER EVIDENCE AS MAY BE SATISFACTORY
          TO THE ISSUER TO THE EFFECT THAT THE TRANSFER HAS BEEN MADE IN
          ACCORDANCE WITH THE SECURITIES ACT.

                                       2
<PAGE>

                 (iv)    The PURCHASER agrees that it will only offer, sell or
     transfer the Common Stock prior to the date which is two years (or such
     shorter period of time as permitted by Rule 144 under the Securities Act or
     any successor provisions thereunder) after the date on which the Units are
     issued to the PURCHASER or such later date, if any, as may be required by
     applicable law, to (i) SELLER, (ii) pursuant to a registration statement
     that has been declared effective under the Securities Act; or (iii)
     pursuant to an available exemption from the registration requirements of
     the Securities Act.

            (b)    Investor Suitability; Independent Investigation; Access to
                   ----------------------------------------------------------
Information; Risk Factors.
-------------------------

                 (i)     PURCHASER has the financial ability to bear the
     economic risk of his investment in the SELLER (including its possible loss)
     and has no need for liquidity with respect to his investment in the Units.

                 (ii)    PURCHASER has such knowledge and experience in
     financial and business matters so as to be capable of evaluating the merits
     and risks of an investment in the Units and has obtained, in its judgment,
     sufficient information from SELLER to evaluate the merits and risks of an
     investment in the Units.

                 (iii)   The Units are not being subscribed for by PURCHASER as
     a result of any material information about SELLER's affairs that has not
     been publicly disclosed.

                 (iv)    PURCHASER acknowledges that SELLER regularly files
     publicly available reports under the Securities Exchange Act of 1934 (the
     "Exchange Act") and PURCHASER is familiar with the previous reports filed
     by SELLER with the Securities and Exchange Commission (the "SEC").

                 (v)     PURCHASER acknowledges that an investment in SELLER
     involves a high degree of risk, and has taken full cognizance of and
     understands all of the risk factors related to an investment in SELLER.

                 (vi)    PURCHASER has determined that an investment in the
     Units is a suitable investment for it.

                 (vii)   In making its decision to purchase the Units herein
     subscribed for, PURCHASER has relied solely upon independent investigations
     made by it. PURCHASER is not relying on SELLER with respect to tax and
     other economic considerations involved in his investment.

                 (viii)  PURCHASER understands that sales or transfers of the
     Units, or any part thereof, may be further restricted by provisions of the
     applicable state securities laws. However, SELLER agrees to file a
     registration statement with the Securities and Exchange Commission for a
     public offering of its Units or the resale of certain of its Common Stock
     within one year of the closing of PURCHASER's acquisition of the Units
     under this Agreement.

                                       3
<PAGE>

     Section 5.  Seller Representations and Warranties.  SELLER hereby
                 -------------------------------------
acknowledges, represents and warrants to, and agrees with, PURCHASER as follows:

            (a)  Seller Reports and Financial Statements.
                 ---------------------------------------

                 (i)     SELLER is registered under the Exchange Act and has
     filed all forms and reports required to be filed with the SEC
     (collectively, the "SELLER SEC Reports"). The SELLER SEC Reports were
     prepared in all material respects in accordance with the requirements of
     applicable law (including the Exchange Act and the rules and regulations of
     the SEC thereunder applicable to such SELLER SEC Reports). As of their
     respective dates, the SELLER SEC Reports did not contain any untrue
     statement of a material fact or omit to state a material fact required to
     be stated therein or necessary to make the statements made therein, in the
     light of the circumstances under which they were made, not misleading.

                 (ii)    Each of the financial statements (including, in each
     case, any related notes thereto) contained in the SELLER SEC Reports, if
     any, filed prior to, on or after the date of this Agreement (i) have been
     or will be prepared in accordance with, and complied or will comply as to
     form with, the published rules and regulations of the SEC and GAAP applied
     on a consistent basis throughout the periods involved (except as otherwise
     noted therein) and (ii) fairly present or will fairly present the financial
     position of SELLER as of the respective dates thereof and the results of
     its operations and cash flows for the periods indicated, except that any
     unaudited interim financial statements were or will be subject to normal
     and recurring year-end adjustments.

            (b)  Availability of Common Stock.  SELLER has sufficient unissued
                 ----------------------------
shares of Common Stock to effect the sale of the Units under this Agreement.
Shares of Common Stock to be issued pursuant to this Agreement have been duly
and validly authorized and, when so issued in accordance with the terms of this
Agreement, will be duly and validly issued, fully paid and nonassessable.

     Section 6.  Indemnity.  PURCHASER and SELLER each hereby agrees to
                 ---------
indemnify and hold harmless the other and its respective officers, directors and
agents and each other person, if any, who controls or is controlled by any
thereof, within the meaning of Section 15 of the Securities Act, against any and
all loss, liability, claim, damage and expense whatsoever (including, but not
limited to, any and all expenses whatsoever reasonably incurred in
investigating, preparing or defending against any litigation commenced or
threatened or any claim whatsoever) arising out of or based upon any false
representation or warranty or breach or failure by the indemnifying party herein
or in any other document furnished in connection with this transaction by the
indemnifying party to the other party or any of it officers, directors, agents
or controlling person.

     Section 7.  Miscellaneous.
                 -------------

            (a)  Modification.  Neither this Agreement nor any provision hereof
                 ------------
may be modified, discharged or terminated except by an instrument in writing
signed by the party against whom any waiver, change, discharge or termination is
sought.

                                       4
<PAGE>

            (b)  Notices.  Any notice, demand or other communication which any
                 -------
party hereto may be required, or may elect, to give to anyone interested
hereunder will be sufficiently given if (a) delivered by a recognized national
courier service to such address as may be given herein or (b) delivered
personally at such address.

            (c)  Binding Effect. Except as otherwise provided herein, this
                 --------------
Agreement is binding upon and inure to the benefit of the parties and their
heirs, executors, administrators, successors, legal representatives and
permitted assigns.

            (d)  Entire Agreement; Effectiveness.  This Agreement, the
                 -------------------------------
Convertible Subordinated Debenture, the Registration Rights Agreement, and the
letter agreement of even date between the parties hereof contain the entire
agreement of the parties with respect to the subject matter hereof and there are
no representations, covenants or other agreements except as stated or referred
to therein. This Agreement will not be effective until it is executed and
approved by SELLER.

            (e)  Assignability.  This Agreement is not transferable or
                 -------------
assignable by either party.

            (f)  Applicable Law. This Agreement will be governed by and
                 --------------
construed in accordance with the laws of the State of Delaware applicable to
contracts made and to be performed entirely within such state.

            (g)  Counterparts; Fax Execution. This Agreement may be executed
                 ---------------------------
through the use of separate signature pages or in any number of counterparts,
and each of such counterparts will, for all purposes, constitute one agreement
binding on all the parties, notwithstanding that all parties are not signatories
to the same counterpart. This Agreement may be signed by fax delivery of a
signed signature page to the other party and such fax execution will be valid in
all respects.

                        [Signatures on following page]

                                       5
<PAGE>

          IN WITNESS WHEREOF, the parties have executed this Agreement on the
dates set forth below.



PURCHASER:                                   STRATEGIC SOLUTIONS GROUP, INC.,
                                             A Delaware Corporation


/s/ Thomas Stone                             By:  /s/ Ernest Wagner
----------------------------                      ------------------------------
THOMAS STONE                                      Ernest Wagner
                                                  President


Address for Notices:                         Address for Notices:

P.O. Box 2028                                1598 Whitehall Road
Blowing Rock, NC                             Suite E
28605                                        Annapolis, MD 21401
                                             Attention: Ernest Wagner

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