EXHIBIT 99.2

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 Annual Report of Barrett Business Services, Inc. (the
"Company") on Form 10-K for the year ended December 31, 2002 as filed with the
Securities and Exchange Commission on the date hereof (the "Report"), I, Michael
D. Mulholland, Chief Financial 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 results of operations of the
Company.

A signed original of this written statement required by Section 906 has been
provided to Barrett Business Services, Inc. and will be retained by Barrett
Business Services, Inc., and furnished to the Securities and Exchange Commission
or its staff upon request.

/s/ Michael D. Mulholland
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Michael D. Mulholland
Chief Financial Officer
April 11, 2003