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 Quarterly Report of Barrett Business Services,  Inc. (the
"Company")  on Form 10-Q for the period  ended  March 31, 2003 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 result of  operations of the
Company.



/s/ Michael D. Mulholland
- -------------------------
Michael D. Mulholland
Chief Financial Officer
May 14, 2003



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