Alexandra Bell is the president and CEO of the Bulletin of the Atomic Scientists. Prior to this, Bell served as the Deputy Assistant Secretary for Nuclear Affairs in the Bureau of Arms Control, Deterrence, and Stability (ADS) at the U.S. Department of State. From 2017 to 2021, she was the Senior Policy Director at the Center for Arms Control and Non-Proliferation and the Council for a Livable World. Previously, Bell served as a Senior Advisor in the Office of the Under Secretary of State for Arms Control and International Security and as an Advisor in ADS, then named the Bureau of Arms Control, Verification and Compliance. She also worked on nuclear policy issues at the Ploughshares Fund and the Center for American Progress. She received a Master’s degree in International Affairs from the New School, and a Bachelor’s degree in Peace, War and Defense from the University of North Carolina at Chapel Hill.

Jill Hruby is a member of the Science and Security Board at the Bulletin of the Atomic Scientists. She previously served as the Under Secretary for Nuclear Security at the Department of Energy and Administrator of the National Nuclear Security Administration from July 2021 to January 2025. Prior to being a political appointee, Hruby had a 34-year career at Sandia National Laboratories retiring in 2017 as the Laboratories Director. From 2018-2021, she worked at the Nuclear Threat Initiative as the inaugural Sam Nunn Distinguished Fellow and a non-resident Distinguished Fellow. She is a member of the National Academy of Engineering and serves on the Committee for International Security and Arms Control. She is an advisory governor for the Lawrence Livermore Executive Board. She has served on the Defense Science Board, and many technical advisory committees and non-profit organization boards. Jill has received the Department of Energy Secretary’s Exceptional Service Award, the National Nuclear Security Administrator’s Distinguished Service Gold Award, and Office of the Secretary of Defense Medal for Exceptional Public Service.

Major General Robert H. Latiff, USAF (Ret.) is a member of the Science and Security Board at the Bulletin of the Atomic Scientists, and an adjunct professor at the University of Notre Dame. He retired from the US Air Force as a major general in 2006. General Latiff was a member of the National Academy of Sciences Committee on Transformative Science and Technology for the Department of Defense. Latiff is the author of Future Peace: Technology, Aggression, and the Rush to War, which looks at the role technology plays in leading us into conflict. He is also the author of Future War: Preparing for the New Global Battlefield.

Alex Wellerstein is an Associate Professor and Director of the Science and Technology Studies program at the Stevens Institute of Technology. He is currently on leave to serve as a visiting researcher with the Nuclear Knowledges group at the Center for International Studies at Sciences Po in Paris, France. He is also the author of Restricted Data: A Nuclear History Blog, and the creator of the NUKEMAP. His first book, Restricted Data: The History of Nuclear Secrecy in the United States, was published by the University of Chicago Press in April 2021. His second book, The Most Awful Responsibility: Truman and the Secret Struggle for Control of the Atomic Age, on nuclear policy in the Truman administration, will be published by HarperCollins in December 2025.