Schilling also lectured at the National War College, West Point, the Army War College, the Army Command and General Staff College, the Air Force Academy, the Foreign Service Institute in the U.S., the Imperial Defence College and the Royal Naval College in the UK. His appearance in Japan in 1969 to discuss the impact of MIRV warheads on the strategic nuclear balance was covered in the Yomiuri Shimbun. He also served as a consultant for the U.S. Department of State and Department of Defense, as well as for the U.S. Senate's Subcommittee on National Policy Machinery. He was a resident fellow at The Bellagio Center in 1975. He was a member of the International Institute for Strategic Studies and the Council on Foreign Relations. At Columbia, he was associate director for the Council for Atomic Age Studies.
