Associate Fellow and Associate Director, International Security ProgramIan Williams is an associate fellow and associate director in the CSIS International Security Program, focusing on missile defense and strategic forces and deterrence. Prior to joining CSIS, he was director of advocacy at the Missile Defense Advocacy Alliance. He has also held internships at the Center for the Study of Weapons of Mass Destruction at National Defense University, the Arms Control Association, and Wikistrat, a strategic analysis consultancy firm. His work has appeared in publications such as Arms Control Today, Arms Control Now, and the Atlantic Sentinel. He holds a B.A. from Southern Illinois University and an M.S. from the Department of Defense and Strategic Studies at Missouri State University. In 2014, he completed his graduate thesis on the future of the Proliferation Security Initiative.