Sharon Squassoni is a research professor at the Institute for International Science and Technology Policy, Elliott School of International Affairs, at the George Washington University. She has specialized in nuclear nonproliferation, arms control and security policy for three decades, serving in the US government at the Arms Control and Disarmament Agency, the State Department, and the Congressional Research Service. Since 2007, she has directed research programs at the Center for Strategic and International Studies and the Carnegie Endowment for International Peace. A political scientist by training, she holds degrees from the State University of New York at Albany, the University of Maryland, and the National War College. She is a former co-chair of the Bulletin‘s Science and Security Board.