Ms. Sharon Squassoni has directed the Proliferation Prevention Program at Center for Strategic and International Studies (CSIS) since 2010. She joined CSIS from the Carnegie Endowment for International Peace, where she was a senior associate in the Nuclear Non-proliferation Program. From 2002 to 2007, Ms. Squassoni advised Congress as a senior specialist in weapons of mass destruction at the Congressional Research Service (CRS), Library of Congress. Ms. Squassoni also served in the executive branch of government from 1992 to 2001, including in the Non-proliferation Bureau and the Political-Military Bureau at the Department of State, as well as in the Arms Control and Disarmament Agency.