During President Jimmy Carter's administration, Ross worked under Deputy Assistant Secretary of Defense Paul Wolfowitz in the Pentagon. There he co-authored a study recommending greater U.S. intervention in the Persian Gulf region "because of our need for Persian Gulf oil and because events in the Persian Gulf affect the Arab–Israeli conflict." During the Reagan administration, Ross served as director of Near East and South Asian affairs in the National Security Council and Deputy Director of the Pentagon's Office of Net Assessment (1982–84).