San Rafael, CA
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Darald “Darry” Callahan is the former president of Chevron Chemical Co. His engineering career includes serving as 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 chairs OSU’s Executive Commercial Advisory Committee, serves on the College of Engineering Advisory Board and is a member of the College of Engineering’s Chemical, Biological, & Environmental Engineering Advisory Board.
Callahan is an honorary OSU trustee, having served as chair of the OSU Foundation Board of Trustees and trustee liaison on the Harvey Ranch (OSU Animal Sciences) Corporate Board.
Callahan is a former director of the Oklahoma Nature Conservancy.