The Fissile Materials Working Group brings together the experience of leading nonproliferation experts and non-governmental organizations concertedly working to support President Obama's vision of "securing all nuclear weapons materials at vulnerable sites within four years."  Members of the Working Group collaborate in a series of meetings designed to create consensus behind top fissile materials priorities, develop actionable policy proposals, and package recommendations for implementation by Obama administration officials.

The Working Group is led by its Steering Committee which serves as the main policy development body of the group and acts as an interface between administration officials and the larger Working Group.  The Steering Committee is comprised of the following professionals:

• Matthew Bunn, Associate Professor of Public Policy; Co-Principal Investigator, Project on Managing the Atom; Co-Principal Investigator, Energy Research, Development, Demonstration, and Deployment (ERD3) Policy Project, Harvard University
• Kenneth N. Luongo, President, Partnership for Global Security (co-chair)
• Miles Pomper, Senior Research Associate, James Martin Center for Nonproliferation Studies
• Jennifer Smyser, Program Officer, Policy and Outreach, The Stanley Foundation
• Sharon Squassoni, Director and Senior Fellow, Proliferation Prevention Program, Center for Strategic and International Studies
• Bennn Tannenbaum, Program Director, Center for Science, Technology, and Security Policy, American Association for the Advancement of Science
• Alexandra Toma, Program Director, Connect U.S. Fund (co-chair)
• Elizabeth (Libby) Turpen, Associate, Booz Allen Hamilton
• Paul Walker, Director, Security & Sustainability, Global Green USA

The Working Group is comprised of the following organizations:

• American Association for the Advancement of Science
• Arms Control Association
• Bulletin of the Atomic Scientists
• Cato Institute
  
• Center for Arms Control and Non-Proliferation
• Center for International Trade and Security, University of Georgia
• Center for Science and Global Security, Princeton University
• Center for Strategic and International Studies
• Connect U.S. Fund
• Council for a Livable World
• Federation of American Scientists
• Friends Committee on National Legislation
• Fund for Peace
• Global Green USA
• The Henry L. Stimson Center
• The Howard H. Baker Jr. Center for Public Policy
• Monterey Institute of International Studies
• National Security Network
• Natural Resources Defense Council
• Nuclear Threat Initiative
• Partnership for Global Security
• Partnership for a Secure America
• Peace Action
• Physicians for Social Responsibility
• Project on Government Oversight
• Project on Managing the Atom, Harvard University
• ReThink Media
• Security Studies Program, Massachusetts Institute of Technology
• The Stanley Foundation
• Union of Concerned Scientists