EXHIBIT 99.1

CERTIFICATION PURSUANT TO
18 U.S.C. SECTION 1350,
AS ADOPTED PURSUANT TO
SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002


In connection with the Quarterly Report of Barrett Business Services, Inc. (the
"Company") on Form 10-Q for the period ended September 30, 2002 as filed with
the Securities and Exchange Commission on the date hereof (the "Report"), I,
William W. Sherertz, Chief Executive Officer of the Company, certify, pursuant
to 18 U.S.C. ss. 1350, as adopted pursuant to ss. 906 of the Sarbanes-Oxley Act
of 2002, 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 result of operations of the
Company.



/s/ William W. Sherertz
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William W. Sherertz
Chief Executive Officer
November 12, 2002