McGeorge "Mac" Bundy (March 30, 1919 – September 16, 1996) was an American expert in foreign and defense policy, serving as United States National Security Advisor to Presidents John F. Kennedy and Lyndon B. Johnson from 1961 through 1966. He was president of the Ford Foundation from 1966 through 1979. He is known primarily for his role in escalating the involvement of the United States in the Vietnam War during the Kennedy and Johnson administrations.After World War II, during which Bundy served as an intelligence officer, in 1949 he was selected for the Council on Foreign Relations. He worked with a study team on implementation of the Marshall Plan. He was appointed as a professor of government at Harvard University, and in 1953 as its youngest dean of the Faculty of Arts and Sciences, working to develop Harvard as a merit-based university. In 1961 he joined Kennedy's administration. After serving at the Ford Foundation, in 1979 he returned to academia as professor of history at New York University, and later as scholar in residence at the Carnegie Corporation.