Committee Assignments: None

Director Since: 2020

Mr. Stein brings to the Board extensive financial, M&A and accounting experience, developed through a 31-year career in the financial services and banking industries. He played a pivotal role in establishing Columbia as a Western-focused regional powerhouse committed to empowering businesses and families as they pursue their ambitions. Under his leadership, Columbia has expanded into attractive markets across the West while building a culture of performance, focused on enriching the customer experience, delivering strong financial results and creating value for its shareholders.

Mr. Stein has served as Chair of the Board, CEO & President of Columbia Banking System since January 2026. He served as President, CEO and Director of Columbia Banking System since 2020, overseeing operations across the United States. He has served as CEO of Columbia Bank since 2023, following the formal separation of the President and CEO roles at the bank. Prior to that, he served as President and CEO of Columbia State Bank from 2020 to 2023. Since joining Columbia in 2005, Mr. Stein has held several senior executive positions including Chief Accounting Officer and Controller (2005-2012), Chief Financial Officer (2012-2018), and Chief Operating Officer (2017-2020).

Prior to joining Columbia, Mr. Stein served as Chief Financial Officer for Albina Community Bank, which he joined following his tenure as Chief Financial Officer at Community Bank.

Mr. Stein began his career in the financial services industry as a certified public accountant focused on tax and municipal and nonprofit auditing. Mr. Stein was recognized as CFO of the year by the Puget Sound Business Journal (PSBJ) in 2015, has been named to the PSBJ’s “Power 100” list for four consecutive years (2022 – 2025), and was a 2025 PSBJ Most Admired CEOs honoree. In addition, Mr. Stein was recognized as Business Leader of the Year in 2024 by the University of Washington’s Milgard School of Business.

He currently serves on the board of the Federal Reserve Bank of San Francisco. His previous board service includes the Washington Bankers Association, Pacific Coast Banking School, and the Executive Council for a Greater Tacoma and the Tacoma-Pierce County Chamber of Commerce.

Education: B.S. in Accounting and Business Administration, University of Idaho; Graduate School of Bank Financial Management and the Graduate School of Banking, University of Wisconsin; previously a licensed CPA in the State of Oregon

Career Highlights

Columbia Banking Systems, Inc. (Nasdaq: COLB)

     President and Chief Executive Officer (since 2020)

     Executive Vice President, Chief Operating Officer (2017-2020)

     Executive Vice President, Chief Financial Officer (2012 – 2018)

     Senior Vice President, Chief Accounting Officer (2005-2012)

Albina Community Bank

     Senior Vice President and Chief Financial Officer (2005)

Community Bank

     Senior Vice President and Chief Financial Officer (1998 - 2005)