As a lieutenant colonel in Vietnam, he commanded detachment "B-36", U.S. Army Special Forces 5th SFG for a time. B-36 was a mixed American and South Vietnamese unit that operated in the III Corps area of Southern South Vietnam. He served in a variety of assignments, including commanding Special Forces in Latin America 1975–77, as a Desk Officer for the Middle East, and Chief of Congressional Relations for the Defense Security Agency (International Security Affairs) in the Office of the Secretary of Defense (1977–79) until his retirement in 1979 at the rank of lieutenant colonel.