Dr. Dov S. Zakheim was Under Secretary of Defense (2001–2004) and Deputy Under Secretary of Defense (1985–87) of the United States. He holds a B.A. from Columbia University and a D.Phil. from St. Antony's College, University of Oxford, and received rabbinic ordination from the Gaon Rabbi Shmuel Walkin. A three-time recipient of the U.S. Department of Defense’s highest civilian award, he is a Fellow of the Royal Swedish Academy of War Sciences, a member of the Council on Foreign Relations, and a member of the Royal Institute of International Affairs. He lectures internationally on American national security issues, Jewish history, and topics in Halakha.