EX-24 6 colb2018ex24.htm POWER OF ATTORNEY
EXHIBIT 24
POWER OF ATTORNEY
The director of Columbia Banking System, Inc. (the “Company”), whose signature appears below, hereby appoints Hadley S. Robbins and Craig D. Eerkes, or either of them, as his/her attorney to sign, in his/her name and behalf and in any and all capacities stated below, the Company's Form 10-K Annual Report pursuant to Section 13 of the Securities Exchange Act of 1934, and likewise to sign any and all amendments and other documents relating thereto as shall be necessary, such person hereby granting to each such attorney power to act with or without the other and full power of substitution and revocation, and hereby ratifying all that any such attorney or his substitute may do by virtue hereof.
This Power of Attorney has been signed by the following persons in the capacity indicated, on the 27th day of February, 2019.

Signature |  | Title
/s/ CRAIG D. EERKES |  | Chairman
Craig D. Eerkes |  |
/s/ HADLEY S. ROBBINS |  | President and Chief Executive Officer
Hadley S. Robbins |  |
/s/ DAVID A. DIETZLER |  | Director
David A. Dietzler |  |
/s/ FORD ELSAESSER |  | Director
Ford Elsaesser |  |
/s/ MARK A. FINKELSTEIN |  | Director
Mark A. Finkelstein |  |
/s/ JOHN P. FOLSOM |  | Director
John P. Folsom |  |
/s/ ERIC S. FORREST |  | Director
Eric S. Forrest |  |
/s/ THOMAS M. HULBERT |  | Director
Thomas M. Hulbert |  |
/s/ MICHELLE M. LANTOW |  | Director
Michelle M. Lantow |  |
/s/ RANDAL L. LUND |  | Director
Randal L. Lund |  |
/s/ S. MAE FUJITA NUMATA |  | Director
S. Mae Fujita Numata |  |
/s/ ELIZABETH W. SEATON |  | Director
Elizabeth W. Seaton |  |
/s/ JANINE T. TERRANO |  | Director
Janine T. Terrano |  |
/s/ WILLIAM T. WEYERHAEUSER |  | Director
William T. Weyerhaeuser |  |