Senior director for nuclear materials security at the Nuclear Threat Initiative and is a co-founding member of the Nuclear Scaling Initiative.
He works at the nexus of clean energy and security, leading efforts to strengthen nonproliferation norms, minimize inventories of weapons-usable nuclear materials, and promote solutions for nuclear waste.
Previously senior advisor for international affairs at the U.S. Department of Energy, as energy attaché at U.S. Embassy Tokyo, and at the U.S. National Nuclear Security Administration.
