Clark received his early education in Winnipeg[1] and attended the University of Manitoba, graduating with a degree in electrical engineering (BSc EE) in 1932.
[2] In 1938, he was promoted to captain and posted to the Royal Military College of Canada (RMC) as an associate professor of electrical and mechanical engineering.
[2] In 1943 he was made chief signals officer at the headquarters of II Canadian Corps and served in North West Europe.
[2] In 1945 he became Deputy Chief of the General Staff in Ottawa before becoming a member of the Military Committee of the Western European Union and then of NATO.
[2] From until 1 October 1968 until 24 March 1973, Clark served as colonel commandant of the new Communications and Electronics Branch.