Kissinger remained at Harvard as a member of the faculty in the Department of Government and, with Robert R. Bowie, co-founded the Center for International Affairs in 1958 where he served as associate director. In 1955, he was a consultant to the National Security Council's Operations Coordinating Board. During 1955 and 1956, he was also study director in nuclear weapons and foreign policy at the Council on Foreign Relations. He released his book Nuclear Weapons and Foreign Policy the following year. From 1956 to 1958 he worked for the Rockefeller Brothers Fund as director of its Special Studies Project. He was director of the Harvard Defense Studies Program between 1958 and 1971. He was also director of the Harvard International Seminar between 1951 and 1971. Outside of academia, he served as a consultant to several government agencies and think tanks, including the Operations Research Office, the Arms Control and Disarmament Agency, Department of State, and the RAND Corporation.