Donald Gregg

Donald Phinney Gregg (born December 5, 1927) is a retired American politician. Gregg worked for the Central Intelligence Agency for 31 years, from 1951 to 1982. He was a National Security Council advisor from 1979 to 1982. He was also the National Security Advisor to U.S. Vice President George H. W. Bush from 1982 to 1989.
Gregg was the United States Ambassador to Korea from 1989 to 1993.