Exhibit 10.1

            FOURTH AMENDMENT TO AMENDED AND RESTATED CREDIT AGREEMENT


      THIS FOURTH  AMENDMENT  TO AMENDED AND  RESTATED  CREDIT  AGREEMENT  (this
"Amendment")  is  entered  into as of July  22,  2003,  by and  between  BARRETT
BUSINESS SERVICES,  INC., a Maryland corporation  ("Borrower"),  and WELLS FARGO
BANK, NATIONAL ASSOCIATION ("Bank").


                                    RECITALS

      A.  Borrower  is  currently  indebted  to Bank  pursuant  to the terms and
conditions  of that  certain  Amended  and  Restated  Credit  Agreement  between
Borrower  and Bank dated as of  September  2, 2002 as amended  from time to time
("Credit Agreement").

      B. Pursuant to the Credit  Agreement,  Borrower  remains  indebted to Bank
under a line of  credit in the  original  principal  amount  of  Eleven  Million
Dollars  ($11,000,000.00)  (the "Line of  Credit"),  which is  evidenced by that
certain Line of Credit Note dated May 20, 2003 (the "Line of Credit Note").  The
Line of Credit Note shall mature and become due and payable in full on March 31,
2004 and as of the date hereof, the outstanding principal balance under the Line
of Credit is $2,107,896.48, plus accrued but unpaid interest.

      C. Bank and  Borrower  have  agreed to  certain  changes  in the terms and
conditions set forth in the Credit Agreement and have agreed to amend the Credit
Agreement to reflect said changes.

      NOW, THEREFORE, for valuable consideration, the receipt and sufficiency of
which are hereby  acknowledged,  subject to the terms and  conditions  described
herein,  the parties hereto agree that the Credit  Agreement shall be amended as
follows; provided,  however, that nothing shall terminate any security interests
or other documents in favor of Bank, all of which shall remain in full force and
effect unless expressly amended hereby:

      1. Amendment to Section 5.5. Section 5.5 of the Credit Agreement is hereby
deleted in its entirety, and the following substituted therefore:

                  "Section 5.5. LOANS, ADVANCES,  INVESTMENTS. Make any loans or
            advances to or investments in any person or entity,  except: (a) any
            of the foregoing existing as of, and disclosed to Bank prior to, the
            date hereof; (b) equity securities of  publicly-traded  companies in
            amounts  not  to  exceed  an  aggregate  of  $200,000.00   plus  any
            investment  gains  (net of any  losses)  thereon;  and (c)  loans or
            advances  to  William  W.  Sherertz  in  amounts  not to  exceed  an
            aggregate of $110,000.00 outstanding at any one time."


      2.  Conditions  Precedent.  The  obligation of Bank to amend the terms and
conditions  of the  Credit  Agreement  as  provided  herein,  is  subject to the
fulfillment  to Bank's  satisfaction  of all of the  following  conditions by no
later than August 1, 2003:

      (a) Bank shall have received, in form and substance  satisfactory to Bank,
each of the following, duly executed:

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      (i) This Amendment.
      (ii) Such other  documents as Bank may require  under any other section of
this Amendment.

      (b) Other Fees and Costs. In addition to Borrower's  obligations under the
Credit Agreement and the other Loan Documents,  Borrower shall have paid to Bank
the full amount of all costs and expenses,  including reasonable attorneys' fees
(including the allocated costs of Bank's in-house  counsel) expended or incurred
by Bank in connection  with the  negotiation  and preparation of this Amendment,
for which Bank has made demand.

      3. General Release.  In consideration of the benefits provided to Borrower
under  the  terms and  provisions  hereof,  Borrower  hereby  agrees as  follows
("General Release"):

      (a) Borrower, for itself and on behalf of its successors and assigns, does
hereby release, acquit and forever discharge Bank, all of Bank's predecessors in
interest,  and all of Bank's past and present  officers,  directors,  attorneys,
affiliates,  employees  and  agents,  of and from any and all  claims,  demands,
obligations,  liabilities,  indebtedness, breaches of contract, breaches of duty
or of any relationship,  acts, omissions,  misfeasance,  malfeasance,  causes of
action,  defenses,  offsets,  debts,  sums  of  money,  accounts,  compensation,
contracts,  controversies,  promises,  damages,  costs, losses and expenses,  of
every type, kind,  nature,  description or character,  whether known or unknown,
suspected or unsuspected,  liquidated or unliquidated,  each as though fully set
forth herein at length (each, a "Released Claim" and collectively, the "Released
Claims"),  that Borrower now has or may acquire as of the later of: (i) the date
this Amendment becomes effective through the satisfaction (or waiver by Bank) of
all  conditions  hereto;  (ii) the date that Borrower has executed and delivered
this  Amendment to Bank  (hereafter,  the  "Release  Date"),  including  without
limitation,  those Released Claims in any way arising out of,  connected with or
related to any and all prior credit accommodations, if any, provided by Bank, or
any of Bank's predecessors in interest, to Borrower,  and any agreements,  notes
or  documents  of any kind  related  thereto  or the  transactions  contemplated
thereby or hereby,  or any other  agreement  or  document  referred to herein or
therein.

      (b) Borrower hereby acknowledges,  represents and warrants to Bank that it
agrees to assume the risk of any and all unknown, unanticipated or misunderstood
defenses  and  Released  Claims  which are  released by the  provisions  of this
General  Release in favor of Bank,  and Borrower  hereby waives and releases all
rights and benefits which it might  otherwise have under any state or local laws
or  statutes  with  regard to the  release  of such  unknown,  unanticipated  or
misunderstood defenses and Released Claims.

      (c) Each person signing below on behalf of Borrower  acknowledges  that he
or she has read each of the provisions of this General Release. Each such person
fully  understands  that this General Release has important legal  consequences,
and each such  person  realizes  that they are  releasing  any and all  Released
Claims  that  Borrower  may  have  as  of  the  Release  Date.  Borrower  hereby
acknowledges  that  it has  had an  opportunity  to  obtain  a  lawyer's  advice
concerning  the legal  consequences  of each of the  provisions  of this General
Release.

      (d) Borrower hereby specifically acknowledges and agrees that: (i) none of
the  provisions  of this General  Release shall be construed as or constitute an
admission of any  liability  on the part of Bank;  (ii) the  provisions  of this
General  Release shall  constitute an absolute bar to any Released  Claim of any
kind,  whether any such  Released  Claim is based on contract,  tort,  warranty,
mistake or any other theory,  whether legal,  statutory or equitable;  and (iii)
any attempt to assert a Released  Claim barred by the provisions of this General
Release

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shall subject  Borrower to the  provisions  of applicable  law setting forth the
remedies for the bringing of groundless,  frivolous or baseless claims or causes
of action.

      4.  Miscellaneous.  Except as specifically  provided herein, all terms and
conditions  of the  Credit  Agreement  shall  remain in full  force and  effect,
without waiver or modification.  All terms defined in the Credit Agreement shall
have the same meaning when used in this Amendment. This Amendment and the Credit
Agreement  shall  be read  together,  as one  document.  This  Amendment  may be
executed  in any  number  of  counterparts,  each of  which  when  executed  and
delivered  shall  be  deemed  to be an  original,  and all of which  when  taken
together shall constitute one and the same Amendment.

      5.   Reaffirmation;    Certification.    Borrower   hereby   remakes   all
representations  and warranties  contained in the Credit Agreement and reaffirms
all covenants set forth therein.  Borrower further certifies that as of the date
of this  Amendment  there  exists no Event of  Default  as defined in the Credit
Agreement,  nor any  condition,  act or event which with the giving of notice or
the passage of time or both would constitute an Event of Default.

UNDER OREGON LAW, MOST  AGREEMENTS,  PROMISES AND COMMITMENTS MADE BY BANK AFTER
OCTOBER 3, 1989 CONCERNING  LOANS AND OTHER CREDIT  EXTENSIONS WHICH ARE NOT FOR
PERSONAL,  FAMILY OR  HOUSEHOLD  PURPOSES  OR SECURED  SOLELY BY THE  BORROWER'S
RESIDENCE MUST BE IN WRITING,  EXPRESS CONSIDERATION AND BE SIGNED BY BANK TO BE
ENFORCEABLE.

      IN WITNESS  WHEREOF,  the parties  hereto have caused this Amendment to be
executed as of the day and year first written above.

                                          WELLS FARGO BANK,
BARRETT BUSINESS SERVICES, INC.               NATIONAL ASSOCIATION


By: /s/ Michael D. Mulholland             By: /s/ Stephen J. Day
    -------------------------                 -------------------------
    Michael D. Mulholland                     Stephen J. Day
    Vice President-Finance                    Vice President


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