Aaron Arnold is a research fellow with the Project on Managing the Atom at Harvard Kennedy School's Belfer Center. His current work focuses on trade controls for preventing WMD proliferation. Prior to his current appointment, he spent nine years as a non-proliferation and counter-proliferation subject matter expert at the U.S. Department of Defense and U.S. Justice Department, where he specialized in WMD counter-proliferation investigations and operations, with an emphasis on threat finance and sanctions evasion. Aaron holds a PhD and MPP in public policy and national security from George Mason University and a BA in international relations from Virginia Tech.