Sébastien Philippe is an Associate Research Scholar at the School of Public and International Affairs with the Princeton University Program on Science and Global Security. He is also an associate fellow (2019-2021) at the Nuclear Knowledges Program at Sciences-Po, Paris. His research focuses on the monitoring and verification of international agreements, the reconstruction of past nuclear weapon activities (nuclear archaeology), and the impact of emerging technologies on the safety, security, and vulnerability of strategic nuclear forces. He was previously a 2018-2019 Stanton Nuclear Security Postdoctoral Fellow at the Harvard Kennedy School’s Belfer Center for Science and International Affairs. From 2011-2012, he worked in the French Ministry of Defense, where he was a nuclear weapon system safety expert for the strategic submarine forces. Philippe is associate editor of the journal Science and Global Security and a member of the International Panel on Fissile Materials. He holds a PhD (2018) in Mechanical and Aerospace Engineering from Princeton University, where he was a 2017-2018 Harold W. Dodds Honorific Fellow.