EMPLOYMENT AGREEMENT

            AGREEMENT  made this 1st day of  November,  1996,  by and  between
U.S.  Opportunity Search,  Inc., a Delaware  Corporation (the "Company"),  and
Gregory Volok (the "Employee").


            WHEREAS, the Company and Princeton PMC, Inc. ("PMC"), the Employee's
present employer, are parties to a consultant agreement dated March 12, 1996
(the "Consultant Agreement"), and they have agreed to terminate the Consultant
Agreement as of the date hereof; and


            WHEREAS, the Company desires to employ the Employee as its most
senior executive officer other than the President of the Company, and the
Employee is willing to be employed, upon the terms and conditions herein set
forth;


            NOW, THEREFORE, in consideration of the mutual covenants herein
contained, the parties agree as follows:

            1.    Positions and Responsibilities.

                  1.1 The Company shall employ the Employee, and the Employee
shall accept employment, as its Executive Vice-President, namely, the most
senior executive officer of the Company other than the President of the Company.
The Employee shall have overall responsibility for the operations of the Company
and power and authority over all employees other than the President of the
Company. The Employee shall report directly to the President and the Board of
Directors of the Company (the "Board") and shall perform such duties
commensurate with his position as Executive Vice-President of the Company and
the responsibilities set forth above as the President and the Board shall
direct. The Employee shall hold such positions with the Company's subsidiaries,
if any, to which, from time to time, he may be elected or appointed during the
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term of this Agreement. As used hereinafter, unless the context otherwise
requires, the term "Company" shall mean the Company and its subsidiaries.

                  1.2 The Employee shall devote his best efforts, and all of his
business time, to the business and affairs of the Company and to the promotion
of its interests.

                  1.3 The Company shall use its best efforts to cause the
Employee to be elected to the Board, but both parties recognize that nominations
and elections to the Board are decisions to be made by the stockholders or the
Board, as the case may be, and not by the Company.

            2. Term of Employment.

                  2.1 The term of employment hereunder shall be five (5) years,
commencing on the date hereof (the "Term"), unless sooner terminated as provided
in this Agreement.

                  2.2 Notwithstanding the provisions of Section 2.1 hereof, the
Company shall have the right, on written notice to the Employee, to terminate
the Employee's employment for Cause, such termination to be effective as of the
date on which notice is given or as of such later date as may be otherwise
specified in the notice; provided, however, that the Company shall give the
Employee an opportunity to cure such Cause, if it is curable, on seven (7) days
written notice.

                  2.3 For purposes of this Agreement, the term "Cause" shall
mean any of the following actions by the Employee: (a) failure to comply with
any of the material terms of this Agreement; (b) engagement in grossly negligent
or willful misconduct injurious to the Company; (c)


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dishonesty or disloyalty to the Company; or (d) the Employee's conviction of a
felony or the Employee's plea of nolo contendere to a felony.

            3. Compensation.

                  3.1 Subject to Section 3.2 hereof, the Employee shall receive
a salary at the rate of $120,000 per annum from the Company, payable in
installments of $10,000 at the end of each month. In addition, the Employee
shall be entitled to (a) medical and dental benefits at the same level as he
presently receives at his current employment, i.e., Pennsylvania Blue Cross and
Blue Shield - Personal Choice No. 5 and Delta Dental; and (b) the use of an
automobile owned or leased by the Company.

                  3.2 If and when the Board determines that the Employee's
performance equals or exceeds the Company's expectations and adds value to the
Company, as measured by the Company's net profits and other relevant criteria,
the Board shall grant the Employee incentive stock options under the Company's
stock option plan, the number of options and the terms thereof to be in the
Board's sole discretion.

                  3.3 The Employee shall be entitled to reimbursement for direct
out-of-pocket expenses (such as, for example, travel expenses, including coach
airfare, and moderately priced hotels) incurred by the Employee in performing
services for the Company by presenting to the Company receipts, vouchers or
other evidence of such expenses.

            4.  Death; Incapacity.

                  4.1 If, during the Term, because of illness or other
incapacity, the Employee shall fail for a period of sixty (60) consecutive days
to render the services contemplated hereunder, then the Company, at its option,
may


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terminate this Agreement by written notice to the Employee as hereinafter
provided. In the event of such termination, the Employee shall no longer be
entitled to his then current salary, but for a period of ninety (90) days after
such termination and, to the extent permitted by any applicable employee benefit
arrangement or plan (or otherwise required by law), the Company shall permit the
Employee to continue to participate for such period in any employee benefit
arrangement or Plan in which he is participating at the time of such
termination.

                  4.2 If the Employee dies during the Term, his employment shall
terminate effective as of the date of death.

            5. Employee Not To Use Certain Information. The Employee has advised
the Company that he is subject to certain agreements or restrictions as follows:
(a) an agreement with Dentsply International ("Dentsply"), dated November 1,
1980; (b) a Dentsply International, Inc., Corporate Finance Manual of Policy and
Procedure effective May 1983; (c) A Dentsply Equipment Division Memorandum,
dated August 2, 1990 entitled "Conflict of Interest" and attachments; and (d) a
revised Conflict of Interest Memorandum dated June 14, 1991 (collectively
referred to as the "Dentsply Restrictions"). The Employee has further advised
the Company that none of the restrictions or limitations on his activities in
the Dentsply Restrictions apply to any rights, responsibilities, duties or
obligations of the Employee under this Agreement, and the Employee agrees and
warrants that he will not violate any of the restrictions or limitations
contained in the Dentsply Restrictions in performing his duties or obligations
under this Agreement, nor will the Employee use in such employment any of
Dentsply's unpublished, confidential, proprietary or secret information.

            6.  Other Activities During Employment.


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                  6.1 Except for his employment by the Company, the Employee
shall not during the Term undertake or engage in any other employment,
occupation or business enterprise to which the Employee devotes any time;
provided, however, that the foregoing shall not be deemed to prohibit the
Employee from investing in securities of any other company engaged in a business
which does not compete, directly or indirectly, with the Company so long as such
investment holdings do not, in the aggregate, constitute more than 90% of such
other company's securities.

                  6.2 During the Term, neither the Employee nor any entity in
which he may be interested as a partner, trustee, director, officer, employee,
shareholder, option holder, lender of money or guarantor, shall be engaged
directly or indirectly in any business competitive with that of the Company or
any subsidiary of the Company (whether or not the Employee renders service to
such subsidiary); provided, however, that the foregoing shall not be deemed to
prohibit the Employee from investing in securities of any other company engaged
in a business which does not compete, directly or indirectly, with the Company,
so long as such investment holdings do not, in the aggregate, constitute more
than 90% of such other company's securities.

                  6.3 The Employee shall not at any time during the Term or
after the termination hereof directly or indirectly divulge, furnish, use,
publish or make accessible to any person or entity any Confidential Information
(as hereinafter defined). Any records of Confidential Information prepared by
the Employee or which come into the Employee's possession during the Term are
and shall remain the property of the Company and upon termination of the
Employee's employment all such records and copies thereof shall be either left
with or returned to the Company.

                  6.4 The term "Confidential Information" shall mean information
disclosed to the Employee or known, learned, created or observed by him as a
consequence of or


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through his employment by the Company, not generally known in the relevant trade
or industry, about the Company's business activities, services and processes,
including but not limited to information concerning advertising, sales
promotion, publicity, sales data, research, printed matter, photographs, films,
reproductions, layout, finances, accounting, methods, processes, trade secrets,
business plans, client or supplier lists and records, potential client or
supplier lists, and client or supplier billing.

            7.  Post Employment Activities.

                  7.1 For a period of eighteen (18) months after termination of
his employment hereunder, regardless of the reason for such termination, neither
the Employee nor any entity in which he may be interested as a partner, trustee,
director, officer, employee, shareholder, option holder, lender or guarantor,
shall be engaged directly or indirectly in any business which is competitive
with the Company or any subsidiary of the Company (whether or not the Employee
renders service to such subsidiary); provided, however, that the foregoing shall
not be deemed to prevent the Employee from investing in securities of any other
company having a class of securities which is publicly traded, so long as such
investment holdings do not, in the aggregate, constitute more than 5% of any
class of such other company's securities.

                  7.2 The Employee acknowledges that he has been employed for
his special talents and that his leaving the employ of the Company would
seriously hamper the business of the Company. In addition to all remedies
permitted by law or in equity and without limiting any injunctive or other
relief to which the Company may be entitled in respect of any obligation of the
Employee, the Company shall be entitled to injunctive relief to enforce the
provisions of Sections 5 and 6 hereof.


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                  7.3 The Employee will not, during the period of eighteen (18)
months after termination of his employment, regardless of the reason for such
termination, either in the Employee's individual capacity or as agent for
another, hire or offer to hire or entice away any person who has been an
officer, employee, or agent of the Company at any time during the immediately
preceding year or in any other manner persuade or attempt to persuade any of
such persons to discontinue their relationship with the Company or any of its
subsidiaries nor divert or attempt to divert from the Company or any of its
subsidiaries any business whatsoever by influencing or attempting to influence
any customer or supplier of the Company or any of its subsidiaries to diminish
or discontinue its business with the Company or such subsidiary.

            8. Assignment. This Agreement shall not be assignable by the Company
except (i) to a corporation or other entity controlling, controlled by or under
common control with the Company or (ii) to a successor to all or substantially
all of the business of the Company. This Agreement shall inure to the benefit of
and be binding upon the Company, its permitted successors and permitted assigns,
and upon the Employee and his heirs, executors, administrators and legal
representatives. This Agreement shall not be assignable by the Employee.

            9. No Third Party  Beneficiaries.  This Agreement does not create,
and  shall  not be  construed  as  creating,  any  rights  enforceable  by any
person not a party to this Agreement, except as provided in Section 7 hereof.

            10.  Headings.  The headings of the  sections  hereof are inserted
for  convenience  only and shall not be deemed to constitute a part hereof nor
to affect the meaning thereof.

            11. Indemnification.


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                  11.1 The Company agrees to defend, indemnify and hold harmless
the Employee with respect to matters arising in connection with his employment
by the Company or his services as a director of the Company to the fullest
extent permitted by the Delaware General Corporation Law or, in the case of
subsidiaries of the Company, the corporation law of the applicable jurisdiction
of incorporation.

                  11.2 The Employee agrees to defend, indemnify and hold
harmless the Company with respect to any liability, damages or claim against the
Company that may arise as a result of any breach of any of the Employee's
agreements and warranties contained in Sections 5, 6 and 7 hereof, including
payment of all attorneys' fees and costs and expenses arising from any claim
against the Company concerning the subject matters of such agreements and
warranties; provided, however, that the Company shall be responsible for 30% of
its own attorneys' fees so incurred.

            12. Interpretation. In case any one or more of the provisions
contained in this Agreement shall, for any reason, be held to be invalid,
illegal or unenforceable in any respect, such invalidity illegality or
unenforceability shall not affect any other provisions of this Agreement, and
this Agreement shall be construed as if such invalid, illegal or unenforceable
provision were not contained herein. Moreover, if any one or more of the
provisions contained in this Agreement shall for any reason be held to be
excessively broad as to duration, geographical scope, activity or subject, it
shall be construed by limiting and reducing so as to be enforceable to the
extent compatible with the applicable law as in effect at the time.

            13. Notices. All notices under this Agreement shall be in writing
and shall be deemed to have been given at the time when mailed by registered or
certified mail, addressed to the address below stated of the party to which
notice is given, or to such changed address as such party may have fixed by
notice:


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            To the Company:   44 Kean Road
                              Short Hills, N.J. 07078

            To the Employee:  172 Laurie Lane
                              Philadelphia, PA  19115

provided, however, that any notice of change of address shall be effective only
upon receipt.

            14. Waivers.  Either party may waive  compliance with or breach of
any  provision  of this  Agreement,  and, in such event,  such party shall not
thereby be deemed to have waived any other  breach of any other  provision  of
this Agreement.

            15. Complete Agreement;  Amendments. This Agreement represents the
entire  agreement of the parties with respect to the subject matter hereof and
may not be amended,  supplemented,  canceled or  discharged  except by written
instrument executed by both parties hereto.

            16.  Governing  Law.  This  Agreement  is to be  governed  by  and
construed  in  accordance  with the laws of the State of New  Jersey,  without
giving effect to principles of conflicts of law.

            17. Submission To Jurisdiction. In the event any of the parties
hereto shall commence any legal proceeding with respect to this Agreement, each
of them agrees to submit themselves to the jurisdiction of the courts of the
State of New Jersey and the United States District Court for the District of New
Jersey for the resolution of any dispute in connection with or arising out of
this Agreement and the transactions contemplated hereunder.


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            IN WITNESS WHEREOF, the parties hereto have executed this Agreement
as of the date first above written.



                              MILESTONE SCIENTIFIC INC.



                              By: /S/ Leonard Osser
                                  -----------------------------------
                                    Name:  Leonard Osser
                                    Title: President




                              /S/ Gregory Volok
                              ---------------------------------------
                                Gregory Volok


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