Darald W. Callahan

San Rafael, California

Darald “Darry” Callahan is the former executive vice president for Chevron Corp. His engineering career includes serving as president of Chevron Chemical Co., executive vice president of Power, Chemicals and Technology for ChevronTexaco Corp., president of Chevron Oil Bahamas Ltd., and president of Warren Petroleum Co.

For two decades, he has been a committed Oregon State University supporter and currently serves on OSU’s Executive Commercial Advisory Committee, the College of Engineering Advisory Board and is a member of the College of Engineering’s Chemical, Biological, & Environmental Engineering Advisory Board. He is a Lifetime Trustee of the OSU Foundation Board of Trustees, having served as chair of the board and trustee liaison on the Harvey Ranch (OSU Animal Sciences) Corporate Board.

Callahan is a former director of the Oklahoma Nature Conservancy.

Callahan earned his B.S. in chemical engineering from Oregon State University in 1964. 


Darald W. Callahan
Term Ends
June 30, 2023