Document:

<PAGE>
EXHIBIT 10.1

CITY NATIONAL
BANK
<TABLE>
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                                PROMISSORY NOTE
<CAPTION>

Principal      Loan Date   Maturity     Loan No.   Call/Coll   Account   Officer  Initials
<S>            <C>         <C>           <C>                   <C>         <C>     <C>
$1,200,000.00  05-17-2001  06-05-2002    39522                 650542      PS      /s/ PS

References in the shaded area are for Lender's use only and do not limit the applicability of this
document to any particular loan or item.

               Any item above containing ***** has been omitted due to text length limitations.

 Borrower: ALLERGY RESEARCH GROUP. INC., A FLORIDA           Lender: City National Bank, NA
 CORPORATION                                                 Burlingame Commercial Banking Canter  #435000
 30806 SANTANA STREET                                        350 Primrose Road
 HAYWARD, CA 94544                                           Burlingame,  CA 94010
===========================================================================================================
</TABLE>

Principal Amount:$1,200,000.00  Initial Rate: 9.000%  Date of Note: May 17, 2001

PROMISE TO PAY. ALLERGY RESEARCH GROUP, INC., A FLORIDA CORPORATION ("Borrower")
promises to pay to City National Bank, NA ("Lender"), or order, in lawful money
of the United States of America, the principal amount of One Million Two Hundred
Thousand & 00/100 Dollars ($1,200,000.00) or so much as may be outstanding,
together with interest on the unpaid outstanding principal balance of each
advance. Interest shall be calculated from the date of each advance until
repayment of each advance.

PAYMENT. Borrower will pay this loan in one payment of all outstanding principal
plus all accrued unpaid interest on June 5, 2002. In addition, Borrower will pay
regular monthly payments of all accrued unpaid interest due as of each payment
date, beginning July 5, 2001, with all subsequent interest payments to be due on
the same day of each month after that. Unless otherwise agreed or required by
applicable law, payments will be applied first to accrued unpaid interest, then
to principal, and any remaining amount to any unpaid collection costs. The
annual interest rate for this Note is computed on a 365/360 basis; that is, by
applying the ratio of the annual interest rate over a year of 360 days,
multiplied by the outstanding principal balance, multiplied by the actual number
of days the principal balance is outstanding. Borrower will pay Lender at
Lender's address shown above or at such other place as Lender may designate in
writing.

VARIABLE INTEREST RATE. The interest rate on this Note is subject to change from
time to time based on changes in an index which is the City National Bank Prime
Rate (the "Index"). Prime Rate shall mean the rate most recently announced by
Lender at its principal office in Beverly Hills, California, as its "Prime
Rate". Any change in the Prime Rate shall become effective on the same business
day on which the Prime Rate shall change, without prior notice to Borrower.
Lender will tell Borrower the current Index rate upon Borrower's request. The
interest rate change will not occur more often than each day. Borrower
understands that Lender may make loans based on other rates as well. The Index
currently is 7.000%. The interest rate to be applied to the unpaid principal
balance of this Note will be at a rate of 2.000 percentage points over the
Index, resulting in an initial rate of 9.000%. NOTICE: Under no circumstances
will the interest rate on this Note be more than the maximum rate allowed by
applicable law.

PREPAYMENT; MINIMUM INTEREST CHARGE. Borrower agrees that all loan fees and
other prepaid finance charges are earned fully as of the date of the loan and
will not be subject to refund upon early payment (whether voluntary or as a
result of default), except as otherwise required by law. In any event, even upon
full prepayment of this Note, Borrower understands that Lender is entitled to a
minimum interest charge of $100.00. Other than Borrower's obligation to pay any
minimum interest charge, Borrower may pay without penalty all or a portion of
the amount owed earlier than it is due. Early payments will not, unless agreed
to by Lender in writing, relieve Borrower of Borrower's obligation to continue
to make payments of accrued unpaid interest. Rather, early payments will reduce
the principal balance due. Borrower agrees not to send Lender payment's marked
"paid in full", "without recourse", or similar language. If Borrower sends such
a payment, Lender may accept it without losing any of Lender's rights under this
Note, and Borrower will remain obligated to pay any further amount owed to
Lender. All written communications concerning disputed amounts, including any
check or other payment instrument that indicates that the payment constitutes
"payment in full" of the amount owed or that is tendered with other conditions
or limitations or as full satisfaction of a disputed amount must be mailed or
delivered to: City National Bank, NA; Burlingame Commercial Banking Center
#435000; 350 Primrose Road; Burlingame, CA 94010.

INTEREST AFTER DEFAULT. Upon Borrower's failure to pay all amounts declared due
pursuant to this section, including failure to pay upon final maturity, Lender,
at its option, may, if permitted under applicable law, increase the variable
interest rate on this Note to 7.000 percentage points over the Index.

DEFAULT. Each of the following shall constitute an event of default ("Event of
Default") under this Note:

     PAYMENT DEFAULT. Borrower fails to make any payment when due under this
     Note.

     OTHER DEFAULTS. Borrower fails to comply with or to perform any other term,
     obligation, covenant or condition contained in this Note or in any of the
     related documents or to comply with or to perform any term, obligation,
     covenant or condition contained in any other agreement between Lender and
     Borrower.

     DEFAULT IN FAVOR OF THIRD PARTIES. Borrower or any Grantor defaults under
     any loan, extension of credit, security agreement, purchase or sales
     agreement, or any other agreement, in favor of any other creditor or person
     that may materially affect any of Borrower's property or Borrower's ability
     to repay this Note or perform Borrower's obligations under this Note or any
     of the related documents.

     FALSE STATEMENTS. Any warranty, representation or statement made or
     furnished to Lender by Borrower or on Borrower's behalf under this Note or
     the related documents is false or misleading in any material respect,
     either now or at the time made or furnished or becomes false or misleading
     at any time thereafter.

     INSOLVENCY. The dissolution or termination of Borrower's existence as a
     going business, the insolvency of Borrower, the appointment of a receiver
     for any part of Borrower's property, any assignment for the benefit of
     creditors, any type of creditor workout, or the commencement of any
     proceeding under any bankruptcy or insolvency laws by or against Borrower.

     CREDITOR OR FORFEITURE PROCEEDINGS. Commencement of foreclosure or
     forfeiture proceedings, whether by judicial proceeding, self-help,
     repossession or any other method, by any creditor of Borrower or by any
     governmental agency against any collateral securing the loan. This includes
     a garnishment of any of Borrower's accounts, including deposit accounts,
     with Lender. However, this Event of Default shall not apply if there is a
     good faith dispute by Borrower as to the validity or reasonableness of the
     claim which is the basis of the creditor or forfeiture proceeding and if
     Borrower gives Lender written notice of the creditor or forfeiture
     proceeding and deposits with Lender monies or a surety bond for the
     creditor or forfeiture proceeding, in an amount determined by Lender, in
     its sole discretion, as being an adequate reserve or bond for the dispute.

     EVENTS AFFECTING GUARANTOR. Any of the preceding events occurs with respect
     to any Guarantor of any of the indebtedness or any Guarantor dies or
     becomes incompetent, or revokes or disputes the validity of, or liability
     under, any guaranty of the indebtedness evidenced by this Note.

<PAGE>

                                 PROMISSORY NOTE
                                   (Continued)                            Page 2
================================================================================

     CHANGE IN OWNERSHIP. Any change in ownership of twenty-five percent (25%)
     or more of the common stock of Borrower.

     ADVERSE CHANGE. A material adverse change occurs in Borrower's financial
     condition, or Lender believes the prospect of payment of performance of
     this Note is impaired.

     INSECURITY. Lender in good faith believes itself insecure.

LENDER'S RIGHTS. Upon default, Lender may declare the entire unpaid principal
balance on this Note and all accrued unpaid interest immediately due, and then
Borrower will pay that amount.

ATTORNEYS' FEES; EXPENSES. Lender may hire or pay someone else to help collect
this Note if Borrower does not pay. Borrower will pay Lender that amount. This
includes, subject to any limits under applicable law, Lender's attorneys' fees
and Lender's legal expenses, whether or not there is a lawsuit, including
attorneys' fees, expenses for bankruptcy proceedings (including efforts to
modify or vacate any automatic stay or injunction), and appeals. Borrower also
will pay any court costs, in addition to all other sums provided by law.

GOVERNING LAW. This Note will be governed by, construed and enforced in
accordance with federal law and the laws of the State of California. This Note
has been accepted by Lender in the State of California.

CHOICE Of VENUE. If there is a lawsuit, Borrower agrees upon Lender's request to
submit to the jurisdiction of the courts of SAN MATEO County, State of
California.

LINE OF CREDIT. This Note evidences a revolving line of credit. Advances under
this Note may be requested either orally or in writing by Borrower or as
provided in this paragraph. Lender may, but need not, require that all oral
requests he confirmed in writing. All communications, instructions, or
directions by telephone or otherwise to Lender are to be directed to Lender's
office shown above. The following persons currently are authorized to request
advances and authorize payments under the line of credit until Lender receives
from Borrower, at Lender's address shown above, written notice of revocation of
their authority: STEPHEN LEVINE; and SUSAN LEVINE. Borrower agrees to be liable
for all sums either: (A) advanced in accordance with the instructions of an
authorized person or (B) credited to any of Borrower's accounts with Lender. The
unpaid principal balance owing on this Note at any time may be evidenced by
endorsements on this Note or by Lender's internal records, including daily
computer print-outs. Lender will have no obligation to advance funds under this
Note if: (A) Borrower or any guarantor is in default under the terms of this
Note or any agreement that Borrower or any guarantor has with Lender, including
any agreement made in connection with the signing of this Note; (B) Borrower or
any guarantor ceases doing business or is insolvent; (C) any guarantor seeks,
claims or otherwise attempts to limit, modify or revoke such guarantor's
guarantee of this Note or any other loan with Lender; (D) Borrower has applied
funds provided pursuant to this Note for purposes other than those authorized by
Lender; or (E) Lender in good faith believes itself insecure.

SUCCESSOR INTERESTS. The terms of this Note shall be binding upon borrower, and
upon Borrower's heirs, personal representatives, successors and assigns, and
shall inure to the benefit of Lender and its successors and assigns.

GENERAL PROVISIONS. Lender may delay or forgo enforcing any of its rights or
remedies under this Note without losing them. Borrower and any other person who
signs, guarantees or endorses this Note, to the extent allowed by law, waive any
applicable statute of limitations, presentment, demand for payment, and notice
of dishonor. Upon any change in the terms of this Note, and unless otherwise
expressly stated in writing, no party who signs this Note, whether as maker,
guarantor, accommodation maker or endorser, shall be released from liability.
All such parties agree that Lender may renew or extend (repeatedly and for any
length of time) this loan or release any party or guarantor or collateral; or
impair, fail to realize upon or perfect Lender's security interest in the
collateral; and take any other action deemed necessary by Lender without the
consent of or notice to anyone. All such parties also agree that Lender may
modify this loan without the consent of or notice to anyone other than the party
with whom the modification is made. The obligations under this Note are joint
and several.

PRIOR TO SIGNING THIS NOTE, BORROWER READ AND UNDERSTOOD ALL THE PROVISIONS OF
THIS NOTE, INCLUDING THE VARIABLE INTEREST RATE PROVISIONS. BORROWER AGREES TO
THE TERMS OF THE NOTE.

BORROWER ACKNOWLEDGES RECEIPT OF A COMPLETED COPY OF THIS PROMISSORY NOTE.

BORROWER:

ALLERGY RESEARCH GROUP, INC., A FLORIDA CORPORATION

By: /s/ Stephen Levine                        By: /s/ Susan Levine
-----------------------------------           ---------------------------------
STEPHEN LEVINE President of ALLERGY           SUSAN LEVINE, Secretary of ALLERGY
RESEARCH GROUP. INC., A FLORIDA               RESEARCH GROUP, INC., A FLORIDA
CORPORATION                                   CORPORATION

<PAGE>

                               CITY NATIONAL BANK
                            COMMERCIAL BANKING CENTER
                                350 PRIMROSE ROAD
                          BURLINGAME, CALIFORNIA 94010

                            Supplemental Terms Letter

                                  May 18, 2001

Attention: Dr. Stephen Levine, President
Allergy Research Group Inc.
30806 Santana Street,
Hayward, CA 94544

         Re:      Promissory Note dated 6/5/2001, in the Original Principal Sum
                  of $1,200,000 executed by Allergy Research Group, Inc. in
                  favor of City National Bank ("CNB")

Dear Dr. Levine:

         This is to confirm that CNB will extend the credit facility more
completely described in the enclosed Note, subject to the additional terms and
conditions set forth herein. Capitalized terms not defined in this letter have
the meanings given them in the Note. This letter is hereby incorporated into the
Note (this letter and the Note, collectively, the "Note").

                         A. ADDITIONAL EVENTS OF DEFAULT

         The following shall constitute additional Events of Default under the
         Note:

1.       Any obligee of Subordinated Debt shall fail to comply with the
         subordination provisions of the documents or instruments, including,
         without limitation, any subordination agreement, evidencing or relating
         to such Subordinated Debt;

2.       Failure of Borrower to furnish CNB, within the times specified, the
         following statements:

         2.1      Within twenty (20) days after each month, a copy of the
                  accounts receivable aging report;

         2.2      Within sixty (60) days after each quarter, a copy of the
                  quarterly company prepared financial statements for such
                  quarter for Borrower and the Subsidiaries including therein a
                  balance sheet, income statement, reconciliation of net worth
                  and statement of cash flows, with notes thereto;

         2.3      Within fifteen (15) days after each year, a copy of CPA
                  prepared federal corporate

                                       1
<PAGE>

                  tax return for such year for Borrower;

         2.4      Within one hundred twenty (120) days after the close of each
                  fiscal year, a copy of the annual CPA audited report for such
                  year for Borrower and the Subsidiaries including therein a
                  balance sheet, income statement, reconciliation of net worth
                  and statement of cash flows, with notes thereto, the balance
                  sheet, income statement and statement of cash flows to be
                  audited by a certified public accountant acceptable to CNB,
                  and certified by such accountants to have been prepared in
                  accordance with generally accepted accounting principles
                  consistently applied and accompanied by Borrower's
                  certification as to whether any event has occurred which
                  constitutes an Event of Default, and if so, stating the facts
                  with respect thereto;

         2.5      Within one hundred twenty (120) days after the close of each
                  fiscal year, a copy of 10K annual report of such year;

         2.6      The personal financial statements for the guarantors to be
                  completed by May 5 of such year;

         2.7      The personal tax return for the guarantors to be completed for
                  such year of this Note within thirty (30) days after its
                  filing;

         2.8      Such additional information, reports and/or statements as CNB
                  may, from time to time, reasonably request;

3.       Failure of Borrower to maintain the following:

         3.1      Tangible Net Worth plus Subordinated Debt of not less than
                  $1,100,000 at all times;

         3.2      A ratio of Total Senior Liabilities to Tangible Net Worth plus
                  Subordinated Debt of not more than 3.00 to 1.00 at all times;

         3.3      After tax profitability of not less than $400,000 every year;

                                 B. DEFINITIONS

         For purposes of the Note, the following terms have the following
meanings:

         "CASH FLOW FROM OPERATIONS" shall be determined on a consolidated basis
for Borrower and the Subsidiaries and shall mean the sum of (a) net income after
taxes earned over the twelve month period ending on the date of determination,
plus (b) amortization of intangible assets, plus (c) interest expense, plus (d)
depreciation expensed during the twelve month period ending on the date of
determination.

                                       2
<PAGE>

         "CURRENT ASSETS" shall be determined on a consolidated basis for
Borrower and the Subsidiaries in accordance with generally accepted accounting
principles consistently applied, excluding, however, from the determination of
Current Assets, loans to shareholders, management or employees, amounts due from
Subsidiaries or affiliates, deferred costs, and other intangible assets.

         "CURRENT LIABILITIES" shall be determined on a consolidated basis for
Borrower and the Subsidiaries in accordance with generally accepted accounting
principles consistently applied, and shall include without limitation (a) all
payments on Subordinated Debt required to he made within one (1) year after the
date on which the determination is made; and (b) all indebtedness payable to
stockholders, affiliates, Subsidiaries or officers regardless of maturity,
unless such indebtedness shall have been subordinated to CNB, on terms
satisfactory to CNB.

         "DEBT SERVICE" shall mean (a) the aggregate amount of Current Maturity
of Long Term Debt plus (b) all interest incurred on borrowed money during the
twelve month period ending on the date of determination. "Current Maturity of
Long Term Debt" shall mean that portion of Borrower's consolidated long term
liabilities, determined in accordance with generally accepted accounting
principles consistently applied, which shall, by the terms thereof, become due
and payable within one (1) year following the date of the balance sheet upon
which such calculations are based.

         "QUICK ASSETS" shall mean the sum of cash, plus cash equivalents, plus
accounts receivable, plus securities classified as short-term marketable
securities according to generally accepted accounting principles consistently
applied, as such items appear on Borrower's consolidated balance sheet,
determined in accordance with generally accepted accounting principles
consistently applied.

         "SUBORDINATED DEBT" shall mean indebtedness of Borrower or any
Subsidiary, the repayment of principal and interest of which is subordinated to
CNB, on terms satisfactory to CNB.

         "SUBSIDIARY" shall mean any corporation, the majority of whose voting
shares are at any time owned, directly or indirectly by Borrower and/or by one
or more Subsidiaries.

         "TANGIBLE NET WORTH" shall mean the total of all assets appearing on a
balance sheet prepared in accordance with generally accepted accounting
principles consistently applied for Borrower and the Subsidiaries on a
consolidated basis, minus (a) all intangible assets, including, without
limitation, unamortized debt discount, affiliate, employee and officer
receivables or advances, goodwill, research and development costs, patents,
trademarks, the excess of purchase price over underlying values of acquired
companies, any covenants not to compete, deferred charges, copyrights,
franchises and appraisal surplus; minus (b) all obligations which arc required
by generally accepted accounting principles consistently applied to be reflected
as a liability on the consolidated balance sheet of Borrower and the
Subsidiaries; minus, (c) the amount, if any, at which shares of stock of a
non-wholly owned Subsidiary appear on the asset side of Borrower's consolidated
balance sheet, as determined in accordance with generally accepted accounting
principles consistently applied; minus (d) minority interests; and minus (e)
deferred income and reserves not otherwise reflected as a liability on the
consolidated balance sheet of Borrower and the Subsidiaries.

         "TOTAL SENIOR LIABILITIES" shall mean, as of any date of determination,
the amount of all

                                       3
<PAGE>

obligations that should be reflected as a liability on a consolidated balance
sheet of Borrower and the Subsidiaries prepared in accordance with generally
accepted accounting principles consistently applied, less Subordinated Debt.

         "WORKING CAPITAL" shall mean Current Assets minus Current Liabilities.

                       C. ADDITIONAL TERMS AND CONDITIONS

         The following additional terms and conditions shall also apply to the
Note:

         1.       FEES. $3,000

         2.       INSURANCE. Pledge of Key Man Life Insurance policy on Dr.
                  Stephen Levine of up to $750,000.

         3.       ACCOUNTS RECEIVABLE AUDIT. Annual accounts receivable audit
                  may be required. Cost to be borned by borrower.

         4.       ENVIRONMENTAL INDEMNIFICATION. Due to the environmentally
                  sensitive nature of the industry in which Borrower is
                  principally engaged and upon which CNB will rely as its
                  primary source of repayment, and in consideration of CNB
                  extending credit to Borrower, Borrower has agreed to indemnify
                  CNB against any claims that may arise as a result of
                  Borrower's business activities that are environmental in
                  nature and for which CNB may be named as a liable party.

         Borrower agrees that it shall indemnify and hold harmless CNB, its
parent company, subsidiaries and all of their respective directors, officers,
employees, agents, successors, attorneys, and assigns from and against any loss,
damage, cost, expense, or liability directly of indirectly arising out of or
attributable to the use, generation, manufacture, production, storage, release,
threatened release, discharge, disposal, or presence of a hazardous substance
on, under, or about Borrower's property or operations or property leased to
Borrower, including but not limited to attorneys' fees (including the reasonable
estimate of the allocated cost of in-house counsel and staff). For these
purposes, the term "hazardous substances" means any substance which is or
becomes designated as "hazardous" or "toxic" under any Federal, state, or local
law. This indemnity shall survive repayment of Borrower's obligations to CNB.

         Except for documents and instruments specifically referenced herein or
in the Note, this letter and the Note constitute the entire agreement of the
parties hereto and supersedes any prior or contemporaneous oral or written
agreements, understandings, representations, warranties and negotiations, if
any, which are merged into this letter and the Note. If you agree to accept the
terms of this letter and the Note, please sign the enclosed acknowledgement copy
of this letter, as well as the enclosed Note, and return them to me on or before
May 28, 2001.

<PAGE>

Sincerely,

CITY NATIONAL BANK, a national
banking association

By: /s/ Paul Seto
    ----------------------------------------------
    Paul Seto, Vice President/Relationship Manager

Accepted and Agreed this ___ day of
_______________________, 20__.

By: /s/ Stephen Levine
    -----------------------------------------
    Stephen Levine

                                       5
<PAGE>

CONSENT OF GUARANTORS:

         The undersigned have previously guaranteed the indebtedness of Stephen
Levine and Susan Levine owed to CNB. The undersigned confirms that the
guaranties and the security given in connection therewith, if any, shall
continue in full force and effect and that such guaranty shall be a separate and
distinct obligation and apply to the indebtedness arising from the Credit
Agreement as amended herein, subject to the overall limitation as to the amount
guaranteed.

                                             /s/ Stephen Levine
                                             ------------------------------
                                             Stephen Levine

                                             /s/ Susan Levine
                                             ------------------------------
                                             Susan Levine

                                       6<PAGE>

                                                                    EXHIBIT 10.1

                             EMPLOYMENT AGREEMENT

THIS EMPLOYMENT AGREEMENT (the "Agreement") entered into as of this 19th day of
March, 2001, between SFBC International, Inc., a Delaware corporation (the
"Company") and Arnold Hantman (the "Executive").

     WHEREAS, in its business, the Company has acquired and developed certain
trade secrets, including but not limited to proprietary processes, sales methods
and techniques, and other like confidential business and technical information
including but not limited to technical information, design systems, pricing
methods, pricing rates or discounts, process, procedure, formula, design of
computer software, or improvement, or any portion or phase thereof, whether
patented or unpatentable, that is of any value whatsoever to the Company, as
well as certain unpatented information relating to the Company's services,
information concerning proposed new services, market feasibility studies,
proposed or existing marketing techniques or plans (whether developed or
produced by the Company or by any other entity for the Company), other
Confidential Information, as defined by Section 8, and information about the
Company's executives, officers, and directors, which necessarily will be
communicated to the Executive by reason of his employment by the Company; and

     WHEREAS, the Company has strong and legitimate business interests in
preserving and protecting its investment in the Executive, its trade secrets and
Confidential Information, and its substantial relationships with vendors, and
Customers, as defined, actual and prospective; and

     WHEREAS, the Company desires to preserve and protect its legitimate
business interests further by restricting competitive activities of the
Executive during the term of this Agreement and following (for a reasonable
time) termination of this Agreement; and

     WHEREAS, the Company desires to employ the Executive and to ensure the
continued availability to the Company of the Executive's services, and the
Executive is willing to accept such employment and render such services, all
upon and subject to the terms and conditions contained in this Agreement;

     NOW, THEREFORE, in consideration of the premises and the mutual
covenants set forth in this Agreement, and intending to be legally bound, the
Company and the Executive agree as follows:

     1.   Representations and Warranties. The Executive hereby represents and
          ------------------------------
warrants to the Company that he (i) is not subject to any written
nonsolicitation or noncompetition agreement affecting his employment with the
Company (other than any prior agreement with the Company), (ii) is not subject
to any written confidentiality or nonuse/nondisclosure agreement affecting his
employment with the Company (other than any prior agreement with the Company),
and (iii) has brought to the Company no trade secrets, confidential business
information, documents, or other personal property of a prior employer.

                                       1
<PAGE>

     2.   Term of Employment.
          ------------------

          (a)  Term. The Company hereby employs the Executive, and the Executive
               ----
hereby accepts employment with the Company for a period commencing on the date
of this Agreement and ending three years from the date of this Agreement.

          (b)  Continuing Effect. Notwithstanding any termination of this
               -----------------
Agreement except for termination under Section 6(b), at the end of the Term or
otherwise, the provisions of Sections 7 and 8 shall remain in full force and
effect and the provisions of Section 8 shall be binding upon the legal
representatives, successors and assigns of the Executive.

     3.   Duties.
          ------

          (a)  General Duties. The Executive shall serve as the chief executive
               --------------
officer of the Company with duties and responsibilities that are customary for
such executives. The Executive shall also perform services for such subsidiaries
as may be necessary. The Executive shall use his best efforts to perform his
duties and discharge his responsibilities pursuant to this Agreement
competently, carefully and faithfully in determining whether or not the
Executive has used his best efforts hereunder, the Executive's and the Company's
delegation of authority and all surrounding circumstances shall be taken into
account and the best efforts of the Executive shall not be judged solely on the
Company's earnings or other results of the Executive's performance.

          (b)  Devotion of Time. Subject to the last sentence of this Section
               ----------------
3(b), the Executive shall devote all of his time, attention and energies during
normal business hours (exclusive of periods of sickness and disability and of
such normal holiday and vacation periods as have been established by the
Company) to the affairs of the Company. The Executive shall not enter the employ
of or serve as a consultant to, or in any way perform any services with or
without compensation to, any other persons, business or organization without the
prior consent of the board of directors of the Company. Notwithstanding the
above the Executive shall be permitted to devote a limited amount of his time,
without compensation, to professional, charitable or similar organizations.

          (c)  Location of Office. The Executive's principal business office
               ------------------
shall be at the Company's Miami, Florida corporate offices. However, the
Executive's job responsibilities shall include all business travel necessary to
the performance of his job.

          (d)  Adherence to Inside Information Policies. The Executive
               ----------------------------------------
acknowledges that the Company is publicly-held and, as a result, has implemented
inside information policies designed to preclude its executives and those of its
subsidiaries from violating the federal securities laws by trading on material,
non-public information or passing such information on to others in breach of any
duty owed to the Company its parent or any third party. The Executive shall
promptly execute any agreements generally distributed by the Company to its
employees requiring such employees to

                                       2
<PAGE>

abide by its inside information policies.

     4.   Compensation and Expenses.
          -------------------------

          (a)  Salary. For the services of the Executive to be rendered under
               ------
this Agreement, the Company shall pay the Executive an annual salary of $225,000
(the Base Salary") retroactive to January 1, 2001. The Base Salary shall be
increased each year by an amount equal to the greater of (i) 3% in excess of the
prior year's Base Salary, or (ii) the cost of living increase based upon the
Consumer Price Index calculated upon the commencement of each year of the
Agreement using the prior month as the measuring month published by the Bureau
of Labor Statistics (or similar successor index). The Consumer Price Index
increase calculation shall be calculated as follows:

             Commencing with the one year anniversary of the commencement of the
             term and the beginning of each year thereafter during the term of
             this Agreement, the Executive's annual salary shall be adjusted in
             accordance with the Consumer Price Index, all Urban Consumers
             issued by the Bureau of Labor Statistics of the U.S. Department of
             Labor using the years 1982-84 as a base of 100 (the "Index"). At
             the commencement of the second year, and of each year thereafter,
             the Executive's adjusted Base Salary shall be multiplied each year
             by a fraction, the numerator of which shall be the published Index
             number for the month preceding the commencement of the new year,
             i.e., March 2002, and the denominator of which shall be the
             published Index number for the month of February 2001. The
             resulting increase to the Executive's Base Salary shall be added to
             the prior year's Base Salary and become a part thereof for the
             current year. In the event that the Index herein referred to ceases
             to be published during the term of this Agreement, or if a
             substantial change is made in the method of establishing such
             index, then the determination of the adjustment in the Executive's
             compensation shall be made with the use of such conversion factor,
             formula or table as may be published by the Bureau of Labor
             Statistics, or if none is available, the parties shall accept
             comparable statistics on the cost of living in the United States as
             shall then be computed and published by an agency of the United
             States, or if not by a respected financial periodical selected by
             the Company.

          (b)  Incentive Bonus. If the Company's net pre tax income for fiscal
               ---------------
2001, 2002, or 2003, is at least $2,000,000, $2,500,000, and $3,000,000
respectively (as applicable), the Company shall pay a bonus to the Executive of
3% of such net pre tax income. In no event shall the total bonus paid to the
Executive exceed 100% of his base salary for such fiscal year. In determining
the Company's annual net pre tax income, there shall be excluded therefrom any
extraordinary income or expenses as defined by generally accepted accounting
principles. The bonus shall be paid within five days after the Company has
received audited financial statements for the appropriate year.

                                       3
<PAGE>

          (c)  Discretionary Bonus. The Executive shall be eligible to receive
               -------------------
an annual bonus in an amount to be determined by the Compensation Committee
based on any criteria or factors the Compensation Committee deems appropriate.

          (d)  Stock Options. The Executive shall receive 30,000 stock options
               -------------
to purchase the Company's common stock under the Company's 1999 Stock Option
Plan pursuant to a separate stock option agreement, subject to stockholder
approval of an amendment to the Plan.

          (e)  Expenses. In addition to any compensation received pursuant to
               --------
Section 4(a) and (b), the Company will reimburse or advance funds to the
Executive for all reasonable travel, entertainment and miscellaneous expenses
incurred in connection with the performance of his duties under this Agreement,
provided that the Executive properly provides a written accounting of such
expenses to the Company in accordance with the Company's practices. Such
reimbursement or advances will be made in accordance with policies and
procedures of the Company in effect from time to time relating to reimbursement
of or advances to Executive officers.

     5.   Benefits.
          --------

          (a)  Vacation and Sick Leave. For each 12-month period during the
               -----------------------
Term, the Executive shall be entitled to four weeks of vacation without loss of
compensation or other benefits to which he is entitled under this Agreement, to
be taken at such times as the Executive may select and the affairs of the
Company may permit. The Executive shall be entitled to sick leave each year.

          (b)  Employee Benefit Programs. The Employee is entitled to
               -------------------------
participate in any pension, 401(k), insurance or other employee benefit plan
that is maintained by the Company for its executives, including programs of life
and medical insurance and reimbursement of membership fees in professional
organizations.

          (c)  Insurance. The Company shall pay or reimburse Mr. Hantman for the
               ---------
premiums on his existing $1,000,000 life insurance policy in an amount not to
exceed the premiums on the Company's keyman policy covering his life. The
Company shall also pay premiums on the Company's medical insurance policy
covering Executive and pay the premiums or reimburse the Executive for
disability insurance covering the Executive's disability which insurance shall
have only a 30-day waiting period on disability insurance in an amount equal to
the maximum allowed by the insurance company.

          (d)  Travel to TradeShows or Conventions. Upon receipt of appropriate
               -----------------------------------

                                       4
<PAGE>

documentation, the Company shall reimburse the Executive for the cost of two
round trip coach airfare tickets for the Executive and his spouse for
attendance at trade shows or conventions.

          (e)  Professional Dues. The Company shall reimburse the Executive for
               -----------------
reasonable costs of professional licenses and dues related to his employment.

          (f)  Automobile. The Company shall pay the Executive an automobile
               ----------
allowance of (i) $700 per month, and (ii) the cost of insurance for such
automobile.

     6.   Termination.
          -----------

          (a)  Death or Disability. Except as otherwise provided in this
               -------------------
Agreement, it shall automatically terminate without act by any party upon the
death, or disability of the Executive. For purposes of this Section 6(a),
"disability" shall mean that for a period of 45 consecutive days or 90 aggregate
days in any 12-month period, the Executive is incapable of substantially
fulfilling the duties set forth in Section 3 because of physical, mental or
emotional incapacity resulting from injury, sickness or disease. In the event of
death of the Executive, the Executive's estate shall receive any unpaid, earned
compensation due the Executive and this Agreement shall terminate.

          (b)  Termination for Cause. The Company may terminate the Executive's
               ---------------------
employment pursuant to the terms of this Agreement at any time for Cause (as
defined below) by giving written notice of termination. Such termination shall
become effective upon the giving of such notice. Upon any such termination for
Cause, the Executive shall have no right to compensation, or reimbursement under
Section 4, or to participate in any Executive benefit programs under Section 5,
except as provided by law, for any period subsequent to the effective date of
termination. For purposes of this Section 6(b), "Cause" shall mean:

          (i)  the Executive is convicted of a felony which is related to the
Executive's employment or the business of the Company; (ii) the Executive, in
carrying out his duties hereunder, has been found in a civil action to have
committed gross negligence or intentional misconduct resulting, in either case,
in material harm to the Company; or (iii) the Executive has been found in a
civil action to have materially breached any provision of Section 6 or Section 7
and to have caused material harm to the Company. The term "found in a civil
action" shall not apply until all appeals permissible under the applicable rules
of procedure or statutes have been determined and no further appeals are
permissible.

          (c)  Special Termination. In the event that (i) the Executive, with or
               -------------------
without change in title or formal corporate action, shall no longer exercise all
of the duties and responsibilities and shall no longer possess substantially all
the authority set forth in Section 3; (ii) the Company materially breaches this
Agreement or the performance of its duties and obligations hereunder; or (iii)
any entity or person not now an executive,officer or director of the Company
becomes either individually or as part of a group the beneficial owner of 30% or
more of the Company's common stock, the Executive, by written notice to the
Company, may elect to deem the

                                       5
<PAGE>

Executive's employment hereunder to have been terminated by the Company without
cause, in which event the Executive shall be entitled at the time of termination
to compensation equal to an amount of three years Base Salary under this
Agreement and benefits payable pursuant to Section 5 herein for such three-year
period and all of Executive's remaining unvested options, if any, shall vest
immediately upon such termination. In such event, the Executive, by written
notice to the Company, may elect to refuse all further obligations of the
Company under Sections 4 and 5 and to release the Company with respect thereto,
in which event the Company shall release the Executive from the provisions of
Section 7.

     7.   Non-Competition Agreement.
          -------------------------

          (a)  Competition with the Company. Until termination of his employment
               ----------------------------
and for a period of 12 months commencing on the date of termination, the
Executive, directly or indirectly, in association with or as a stockholder,
director, officer, consultant, employee, partner, joint venturer, member or
otherwise of or through any person, firm, corporation, partnership, association
or other entity, shall not compete with the Company or any of its affiliates
that are competitive with the products by working as a principal investigator
for a clinical research company within any metropolitan area in the United
States; provided, however, the foregoing shall not prevent Executive from
accepting employment with an enterprise engaged in two or more lines of
business, one of which is the same or similar to the Company's business (the
"Prohibited Business") if Executive's employment is totally unrelated to the
Prohibited Business; provided, further, the foregoing shall not prohibit
Executive from owning up to 5% of the securities of any publicly-traded
enterprise provided Executive is not an executive, director, officer, consultant
to such enterprise or otherwise reimbursed for services rendered to such
enterprise.

          (b)  Solicitation of Customers. During the periods in which the
               -------------------------
provisions of Section 7(a) shall be in effect, the Executive, directly or
indirectly, will not seek Prohibited Business from any Customer (as defined
below) on behalf of any enterprise or business other than the Company, refer
Prohibited Business from any Customer to any enterprise or business other than
the Company or receive commissions based on sales or otherwise relating to the
Prohibited Business from any Customer, or any enterprise or business other than
the Company. For purposes of this Agreement , the term "Customer" means any
person, firm, corporation, partnership, association or other entity to which the
Company or any of its affiliates sold or provided goods or services during the
24-month period prior to the time at which any determination is required to be
made as to whether any such person, firm, corporation, partnership, association
or other entity is a Customer, or who or which was approached by or who or which
has approached an employee of the Company for the purpose of soliciting business
from the Company or the third party, as the case may be.

          (c)  No Payment.  The Executive acknowledges and agrees that no
               ----------
separate or additional payment will be required to be made to his in
consideration of his undertakings in this Section 7.

                                       6
<PAGE>

     8.   Non-Disclosure of Confidential Information.
          ------------------------------------------

          (a)  Confidential Information. Confidential Information includes, but
               ------------------------
is not limited to, trade secrets as defined by the common law and statute in
Florida or any future Florida statute, processes, policies, procedures,
techniques, designs, drawings, know-how, show-how, technical information,
specifications, computer software and source code, information and data relating
to the development, research, testing, costs, marketing and uses of the Services
(as defined herein), the Company's budgets and strategic plans, and the identity
bnd special needs of Customers , databases, data, all technology relating to the
Company's businesses, systems, methods of operation, client or Customer lists,
Customer information, solicitation leads, marketing and advertising materials,
methods and manuals and forms, all of which pertain to the activities or
operations of the Company, names, home addresses and all telephone numbers and
e-mail addresses of the Company's executives, former executives, clients and
former clients. In addition, Confidential Information also includes Customers
and the identity of and telephone numbers, e-mail addresses and other addresses
of executives or agents of Customers (each a "Contact Person") who are the
persons with whom the Company's executives and agents communicate in the
ordinary course of business. Confidential Information also includes, without
limitation, Confidential Information received from the Company's subsidiaries
and affiliates. For purposes of this Agreement, the following will not
constitute Confidential Information (i) information which is or subsequently
becomes generally available to the public through no act of the Executive, (ii)
information set forth in the written records of the Executive prior to
disclosure to the Executive by or on behalf of the Company which information is
given to the Company in writing as of or prior to the date of this Agreement,
and (iii) information which is lawfully obtained by the Executive in writing
from a third party (excluding any affiliates of the Executive) who did not
acquire such confidential information or trade secret, directly or indirectly,
from Executive or the Company. As used herein, the term "Services" shall include
all formulations, foods, drugs and medical devices for which the Company has
performed any clinical or pre-clinical research, testing, protocol design, data
management, medical writing or other, during the term of Executive's employment.

          (b)  Legitimate Business Interests. The Executive recognizes that the
               -----------------------------
Company has legitimate business interests to protect and as a consequence, the
Executive agrees to the restrictions contained in this Agreement because they
further the Company's legitimate business interests. These legitimate business
interests include, but are not limited to (i) trade secrets as defined in
Section 8(b), (ii) valuable confidential business or professional information
that otherwise does not qualify as trade secrets including all Confidential
Information; (iii) substantial relationships with specific prospective or
existing Customers or clients; (iv) customer or client goodwill associated with
the Company's business; and (v) specialized training relating to the Company's
technology, methods and procedures.

          (c)  Confidentiality. For a period of three years following
               ---------------
termination of employment, the Confidential Information shall be held by the
Executive in the strictest confidence and shall not, without the prior written
consent of the Company, be disclosed to any person other than in connection with
the Executive's employment by the Company. The Executive further acknowledges
that such Confidential Information as is acquired and used by the Company or its

                                       7
<PAGE>

affiliates is a special, valuable and unique asset. The Executive shall exercise
all due and diligence precautions to protect the integrity of the Company's
Confidential Information and to keep it confidential whether it is in written
form, on electronic media or oral. The Executive shall not copy any Confidential
Information except to the extent necessary to his employment nor remove any
Confidential Information or copies thereof from the Company's premises except to
the extent necessary to his employment and then only with the authorization of
an officer of the Company. All records, files, materials and other Confidential
Information obtained by the Executive in the course of his employment with the
Company are confidential and proprietary and shall remain the exclusive property
of the Company or its customers, as the case may be. The Executive shall not,
except in connection with and as required by his performance of his duties under
this Agreement, for any reason use for his own benefit or the benefit of any
person or entity with which he may be associated or disclose any such
Confidential Information to any person, firm, corporation, association or other
entity for any reason or purpose whatsoever without the prior written consent of
an Executive officer of the Company (excluding the Executive, if applicable).

     9.   Equitable Relief.
          ----------------

          (a)  The Company and the Executive recognize that the services to be
rendered under this Agreement by the Executive are special, unique and of
extraordinary character, and that in the event of the breach by the Executive of
the terms and conditions of this Agreement or if the Executive, without the
prior consent of the board of directors of the Company, shall leave his
employment for any reason and take any action in violation of Section 7 or
Section 8, the Company shall be entitled to institute and prosecute proceedings
in any court of competent jurisdiction referred to in Section 9(b) below, to
enjoin the Executive from breaching the provisions of Section 7 or Section 8. In
such action, the Company shall not be required to plead or prove irreparable
harm or lack of an adequate remedy at law or post a bond or any security.

          (b)  Any action must be commenced in Miami-Dade County, Florida. The
Executive and the Company irrevocably and unconditionally submit to the
exclusive jurisdiction of such courts and agree to take any and all future
action necessary to submit to the jurisdiction of such courts. The Executive and
the Company irrevocably waive any objection that they now have or hereafter
irrevocably waive any objection that they now have or hereafter may have to the
laying of venue of any suit, action or proceeding brought in any such court and
further irrevocably waive any claim that any such suit, action or proceeding
brought in any such court has been brought in an inconvenient forum. Final
judgment against the Executive or the Company in any such suit shall be
conclusive and may be enforced in other jurisdictions by suit on the judgment, a
certified or true copy of which shall be conclusive evidence of the fact and the
amount of any liability of the Executive or the Company therein described, or by
appropriate proceedings under any applicable treaty or otherwise.

     10.  Conflicts of Interest.  While employed by the Company, the Executive
          ---------------------
shall not, except for Lam Pharmaceutical, Inc., or its successors, or unless
approved by the Compensation

                                       8
<PAGE>

Committee of the Board of Directors, directly or  indirectly:

          (a)  participate as an individual in any way in the benefits of
transactions with any of the Company's suppliers or Customers, including,
without limitation, having a financial interest in the Company's suppliers or
Customers, or making loans to, or receiving loans, from, the Company's suppliers
or Customers;

          (b)  realize a personal gain or advantage from a transaction in which
the Company has an interest or use information obtained in connection with the
Executive's employment with the Company for the Executive's personal advantage
or gain; or

          (c)  accept any offer to serve as an officer, director, partner,
consultant, manager with, or to be employed in a technical capacity by, a person
or entity which does business with the Company.

     11.  Inventions, Ideas, Processes, and Designs. All inventions, ideas,
          -----------------------------------------
processes, programs, software, and designs (including all improvements) (i)
conceived or made by the Executive during the course of his employment with the
Company (whether or not actually conceived during regular business hours) and
for a period of six months subsequent to the termination or expiration of such
employment with the Company and (ii) related to the business of the Company,
shall be disclosed in writing promptly to the Company and shall be the sole and
exclusive property of the Company. An invention, idea, process, program,
software, or design including an improvement) shall be deemed related to the
business of the Company if (a) it was made with the Company's equipment,
supplies, facilities, or Confidential Information, (b) results from work
performed by the Executive for the Company, or (c) pertains to the current
business or demonstrably anticipated research or development work of the
Company. The Executive shall cooperate with the Company and its attorneys in the
preparation of patent and copyright applications for such developments and, upon
request, shall promptly assign all such inventions, ideas, processes, and
designs to the Company. The decision to file for patent or copyright protection
or to maintain such development as a trade secret shall be in the sole
discretion of the Company, and the Executive shall be bound by such decision.
The Executive shall provide as a schedule to this Employment Agreement, a
complete list of all inventions, ideas, processes, and designs, if any, patented
or unpatented, copyrighted or non-copyrighted, including a brief description,
which he made or conceived prior to his employment with the Company and which
therefore are excluded from the scope of this Agreement.

     12.  Indebtedness. If, during the course of the Executive's employment
          ------------
under this Agreement, the Executive becomes indebted to the Company for any
reason, the Company may, if it so elects, set off any sum due to the Company
from the Executive and collect any remaining balance from the Executive unless
the Executive has entered into a written agreement with the Company.

     13.  Assignability. The rights and obligations of the Company under this
          -------------
Agreement shall inure to the benefit of and be binding upon the successors and
assigns of the Company, provided that such successor or assign shall acquire all
or substantially all of the securities or assets

                                       9
<PAGE>

and business of the Company. The Executive's obligations hereunder may not be
assigned or alienated and any attempt to do so by the Executive will be void.

     14.  Severability.
          ------------

          (a)  The Executive expressly agrees that the character, duration and
geographical scope of the non-competition provisions set forth in this Agreement
are reasonable in light of the circumstances as they exist on the date hereof.
Should a decision, however, be made at a later date by a court of competent
jurisdiction that the character, duration or geographical scope of such
provisions is unreasonable, then it is the intention and the agreement of the
Executive and the Company that this Agreement shall be construed by the court in
such a manner as to impose only those restrictions on the Executive's conduct
that are reasonable in the light of the circumstances and as are necessary to
assure to the Company the benefits of this Agreement. If, in any judicial
proceeding, a court shall refuse to enforce all of the separate covenants deemed
included herein because taken together they are more extensive than necessary to
assure to the Company the intended benefits of this Agreement, it is expressly
understood and agreed by the parties hereto that the provisions of this
Agreement that, if eliminated, would permit the remaining separate provisions to
be enforced in such proceeding shall be deemed eliminated, for the purposes of
such proceeding, from this Agreement.

          (b)  If any provision of this Agreement otherwise is deemed to be
invalid or unenforceable or is prohibited by the laws of the state or
jurisdiction where it is to be performed, this Agreement shall be considered
divisible as to such provision and such provision shall be inoperative in such
state or jurisdiction and shall not be part of the consideration moving from
either of the parties to the other. The remaining provisions of this Agreement
shall be valid and binding and of like effect as though such provision were not
included.

     15.  Notices and Addresses. All notices, offers, acceptance and any other
          ---------------------
acts under this Agreement (except payment) shall be in writing, and shall be
sufficiently given if delivered to the addressees in person, by Federal Express
or similar receipted delivery, by facsimile delivery or, if mailed, postage
prepaid, by certified mail, return receipt requested, as follows:

     To the Company:                    SFBC International, Inc.
                                        11190 Biscayne Boulevard
                                        Miami, Florida 33181
                                        Facsimile: (305) 895-8616

     With a Copy to:                    Michael D. Harris, Esq.
                                        Michael Harris, P.A.
                                        1645 Palm Beach Lakes Blvd.
                                        Suite 550
                                        West Palm Beach, FL 33401
                                        Facsimile (561) 478-1817

                                       10
<PAGE>

     To the Executive:                  Mr. Arnold Hantman
                                        11190 Biscayne Boulevard
                                        Miami, FL 33181
                                        Facsimile: (305) 895-8616

or to such other address as either of them, by notice to the other may designate
from time to time. The transmission confirmation receipt from the sender's
facsimile machine shall be evidence of successful facsimile delivery. Time shall
be counted to, or from, as the case may be, the delivery in person or by
mailing.

     16.  Counterparts.  This Agreement may be executed in one or more
          ------------
counterparts, each of which shall be deemed an original but all of which
together shall constitute one and the same instrument. The execution of this
Agreement may be by actual or facsimile signature.

     17.  Attorney's Fees. In the event that there is any controversy or
          ---------------
claim arising out of or relating to this Agreement, or to the interpretation,
breach or enforcement thereof, and any action or proceeding is commenced to
enforce the provisions of this Agreement, the prevailing party shall be entitled
to a reasonable attorney's fee, costs and expenses.

     18.  Governing Law. This Agreement and any dispute, disagreement, or
          -------------
issue of construction or interpretation arising hereunder whether relating to
its execution, its validity, the obligations provided therein or performance
shall be governed or interpreted according to the internal laws of the State of
Florida without regard to choice of law considerations.

     19.  Entire Agreement. This Agreement constitutes the entire Agreement
          ----------------
between the parties and supersedes all prior oral and written agreements between
the parties hereto with respect to the subject matter hereof. Neither this
Agreement nor any provision hereof may be changed, waived, discharged or
terminated orally, except by a statement in writing signed by the party or
parties against which enforcement or the change, waiver discharge or termination
is sought.

     20.  Additional Documents. The parties hereto shall execute such additional
          --------------------
instruments as may be reasonably required by their counsel in order to carry out
the purpose and intent of this Agreement and to fulfill the obligations of the
parties hereunder.

     21.  Section and Paragraph Headings. The section and paragraph headings in
          ------------------------------
this Agreement are for reference purposes only and shall not affect the meaning
or interpretation of this Agreement.

     22.  Arbitration. Except for a claim for equitable relief, any controversy,
          -----------
dispute or claim arising out of or relating to this Agreement, or its
interpretation, application, implementation, breach or enforcement which the
parties are unable to resolve by mutual agreement, shall be settled by
submission by either party of the controversy, claim or dispute to binding
arbitration in Miami-Dade County, Florida (unless the parties agree in writing
to a

                                       11
<PAGE>

different location), before three arbitrators in accordance with the rules
of the American Arbitration Association then in effect. In any such arbitration
proceeding the parties agree to provide all discovery deemed necessary by the
arbitrators. The decision and award made by the arbitrators shall be final,
binding and conclusive on all parties hereto for all purposes, and judgment may
be entered thereon in any court having jurisdiction thereof.

         IN WITNESS WHEREOF, the Company and the Executive have executed this
Agreement as of the date and year first above written.

                                              SFBC International, Inc.

____________________________________               By:__________________________
                                                      Lisa Krinsky, M.D.,
                                                      President

____________________________________
                                                   Executive:

____________________________________               By:__________________________
                                                      Arnold Hantman

____________________________________

                                       12

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