EXHIBIT 32

CERTIFICATION PURSUANT TO
18 U.S.C. SECTION 1350


In connection with the Quarterly Report of Barrett Business Services, Inc. (the
"Company") on Form 10-Q for the period ended June 30, 2005, as filed with the
Securities and Exchange Commission on the date hereof (the "Report"), the
undersigned certify, pursuant to 18 U.S.C. ss. 1350, that:

(1) The Report fully complies with the requirements of section 13(a) or
15(d) of the Securities Exchange Act of 1934; and

(2) The information contained in the Report fairly presents, in all
material respects, the financial condition and results of operations of the
Company.




/s/ William W. Sherertz /s/ Michael D. Mulholland
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William W. Sherertz Michael D. Mulholland
Chief Executive Officer Chief Financial Officer
August 15, 2005 August 15, 2005