Aaron Arnold is a Senior Associate Fellow with the Centre for Financial Crime and Security Studies at RUSI, where his work focuses on sanctions and proliferation financing.

Prior to joining RUSI, Aaron served as the finance and economics expert on the UN Panel of Experts for DPRK sanctions, where he monitored global sanctions implementation and investigated instances of sanctions violations. Before joining the Panel of Experts, Aaron was a fellow with the Project on Managing the Atom at the Harvard Kennedy School's Belfer Center, where he published work on the extraterritorial use of sanctions and the efficacy of WMD trade controls.

He also previously worked as a counter-proliferation subject matter expert in the U.S. Department of Defense and the 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 political science from Virginia Tech.