The Honorable William H. Tobey directs the Center for National Security and International Studies at Los Alamos National Laboratory. 

From 2009-2021, Tobey was a Senior Fellow and Lecturer at the Harvard Kennedy School’s Belfer Center for Science and International Affairs. He served as Deputy Administrator for Defense Nuclear Nonproliferation at the National Nuclear Security Administration from 2006-2009. There, he managed the U.S. government's largest program to prevent nuclear proliferation and terrorism by detecting, securing, and disposing of dangerous nuclear material. He also served on the National Security Council Staff under three presidents, in defense policy, arms control, and counter-proliferation positions. He has participated in international negotiations ranging from the START talks with the Soviet Union to the Six Party Talks with North Korea. He also has a decade of experience in investment banking and venture capital. 

He chairs the Nuclear and Radiation Studies Board of the National Academies of Sciences Engineering and Medicine and the board of the World Institute for Nuclear Security. In 2021, he was elected to the American Nuclear Society’s Nuclear Nonproliferation Policy Division’s executive committee. 

He holds a Bachelor of Science degree from Northwestern University and a Master of Public Policy degree from Harvard University.