Daniel Poneman is a Senior Fellow with the Belfer Center at the Harvard Kennedy School and the President and Chief Executive Officer of Centrus Energy Corp., which provides enrichment, fuel, and fuel services to utilities that operate nuclear reactors throughout the world. Poneman previously served as Deputy Secretary of the U.S. Department of Energy, as Acting Secretary of Energy, and on the National Security Council staff. He is the coauthor of Going Critical: The First North Korean Nuclear Crisis.