POA

POWER OF ATTORNEY

The undersigned hereby constitutes and appoints each
of Anthony Harris and Ben Ward, signing singly, the
undersigned's true and lawful attorney-in-fact to:

1. Execute for and on behalf of the
undersigned, in the undersigned's capacity as an officer
and/or director of Barrett Business Services, Inc. (the
"Company"), Forms 3, 4, and 5 in accordance with Section
16(a) of the Securities Exchange Act of 1934 and the rules
thereunder, and any other forms or reports the undersigned
may be required to file in connection with the undersigned's
ownership, acquisition, or disposition of securities of the
Company, including forms required to generate codes for the
Securities and Exchange Commission's electronic filing
system; and

2. Do and perform any and all acts for and on
behalf of the undersigned which may be necessary or
desirable to complete and execute any such Form 3, 4, or 5,
or other form or report, and timely file such form or report
with the United States Securities and Exchange Commission
and any stock exchange or similar authority as appropriate.

The undersigned hereby grants to each such
attorney-in-fact full power and authority to do and
perform any and every act and thing necessary or proper
to be done in the
exercise of any of the rights and powers herein granted, as
fully to all intents and purposes as the
undersigned could do if personally present, hereby
ratifying and confirming all that such
attorney-in-fact shall lawfully do or cause to be done by
virtue of this power of attorney and the rights and powers
herein granted. The undersigned acknowledges that the
foregoing attorneys. in-fact, in serving in such capacity
at the request of the undersigned, are not assuming, and
the Company is not assuming, any of the undersigned's
responsibilities to comply with Section 16 of the
Securities Exchange Act of 1934.

This Power of Attorney shall remain in full force
and effect until the undersigned is no longer subject to
Section 16 of the Securities Exchange Act of 1934 with
respect to the undersigned's holdings of and transactions
in securities issued by the Company, unless earlier revoked
by the undersigned in a signed writing delivered to the
foregoing attorneys-in-fact.

IN WITNESS WHEREOF, the undersigned has caused
this Power of Attorney to be executed as of this 12
day of September, 2020.

/s/ James Potts
James Potts