Current Activities: Reif is Deputy Assistant Secretary of Defense for Threat Reduction and Arms Control. He was previously Director for Disarmament & Threat Reduction Policy at the Arms Control Association. Prior to that he was the Director of Nuclear Non-Proliferation at the Center for Arms Control and Non-Proliferatin where he focused on arms control, nuclear nonproliferation, nuclear weapons, and preventing nuclear terrorism. In addition to writing, blogging, and media on these issues, he shared information and did outreach on these issues on Capital Hill, particularly on the Senate side. He was previously a Commissioner’s Assistant to Morton Halperin, one of the twelve Commissioners on the Congressional Commission on the Strategic Posture of the United States. The commission, chaired by William Perry, had a mandate to “broadly review the nation’s strategic posture, including an array of capabilities and military programs such as conventional strategic systems, nonproliferation and counterproliferation programs, missile defense systems and the future of nuclear weapons.” Reif drafted memos for Dr. Halperin on such issues as the evolution of U.S. nuclear weapons policy, the CTBT, the U.S. nuclear stockpile size, the U.S. nuclear infrastructure, Russian and Chinese nuclear modernization programs, and extended nuclear deterrence. He also liased and arranged meetings with congressional staff, department of defense officials, and nuclear laboratory officials in support of Dr. Halperin and the Commission.