David Nusbaum is a leading expert in nuclear engineering and international science diplomacy, with over 30 years of experience in senior roles at the Israel Atomic Energy Commission, focusing on non-proliferation and technological advancements. He has served as Israel's Ambassador and Permanent Representative to the International Atomic Energy Agency (IAEA) and Comprehensive Test Ban Treaty Organization (CTBTO PrepCom( and was a Managing the Atom (MTA)/International Security Program (ISP) research fellow from 2011 to 2014 at Belfer Center for Science and International Affairs, Harvard Kennedy School in Cambridge, USA. He currently contributes as a Non-Resident Senior Fellow at the Belfer Center and a Guest Researcher at the International Institute for Applied Systems Analysis (IIASA)  in Austria. His work bridges science and policy to address global challenges in nuclear security, energy, and climate change.