FORM 4 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
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 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
1. Name and Address of Reporting Person *
Potts James R
(Last) (First) (Middle)
8100 NE PARKWAY DRIVE
SUITE 200
(Street)
VANCOUVER WA 98662
(City) (State) (Zip)
2. Issuer Name and Ticker or Trading Symbol
BARRETT BUSINESS SERVICES INC [ BBSI ] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
Director 10% Owner
X Officer (give title below) Other (specify below)
EVP Gen Counsel & Secretary
3. Date of Earliest Transaction (Month/Day/Year)
09/16/2021
4. If Amendment, Date of Original Filed (Month/Day/Year)
 6. Individual or Joint/Group Filing (Check Applicable Line)
X Form filed by One Reporting Person
Form filed by More than One Reporting Person
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V Amount (A) or (D) Price
Common Stock 09/16/2021   M   1,177 A $ 0 1,177 D  
Common Stock 09/16/2021   F   464 D $ 76.07 713 D  
Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 6. Date Exercisable and Expiration Date (Month/Day/Year) 7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Restricted Stock Units $ 0 (1) 09/16/2021   M     1,177   (2)   (2) Common Stock 1,177 $ 0 3,531 D  
Explanation of Responses:
1. Each Restricted Stock Unit represents a contingent right to receive one share of the Issuer's common stock.
2. The Restricted Stock Units vest in four equal annual installments beginning September 16, 2021, and will be settled by delivery of unrestricted shares of common stock on the vesting date.
/s/ Anthony Harris, as attorney-in-fact 09/20/2021
** Signature of Reporting Person Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
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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