Bill Donaldson served as Chairman of the SEC from 2003 to 2005. He arrived at the Commission with over 45 years of experience, working in business, government, and academia. He co-founded and served as Chairman and CEO of the investment banking firm, Donaldson, Luftkin & Jenrette; and served as Chairman and CEO of the New York Stock Exchange. He co-founded the Yale University School of Management and served as that School's first Dean. He also served in the United States Marine Corps. And his varied government service in the executive branch spanned five presidential administrations, including service as Under Secretary of State in the Nixon administration, and as a special advisor to Vice President Nelson Rockefeller. He was also Chairman of the Carnegie Endowment for International Peace from 1999 to 2003.