John F. Lehman, Jr. (born September 14, 1942) is an American investment banker and writer who served as Secretary of the Navy in the Reagan administration and in 2003-4 was a member of the 9/11 Commission. He was also involved in the Project for the New American Century, that claimed the absence of a "catastrophic and catalyzing event - like a new Pearl Harbor" in the document "Rebuilding America´s Defenses", which was released in September 2000.
Lehman currently serves on the National Security Advisory Council for the Center for Security Policy (CSP), and on the board of trustees for the think tank Foreign Policy Research Institute (FPRI). Lehman is also a member of the National Commission on Terrorist Attacks Upon the United States. He also served as an advisor to Sen. John McCain for the 2008 presidential race.
Born in Philadelphia, Pennsylvania, he graduated from La Salle College High School and received a B.S. in international relations from St. Joseph's University in 1964, gained a B.A. and M.A. from Gonville & Caius College, Cambridge and went on to earn a Ph.D. from the University of Pennsylvania.