Expert Bio

Pranay Vaddi is currently a Senior Nuclear Fellow in the Center for Nuclear Security Policy at the Massachusetts Institute of Technology. From May 2022 to January 2025, he served as Special Assistant to President Biden and Senior Director for Arms Control, Disarmament, and Nonproliferation at the National Security Council. Prior to this, he served as a senior advisor in the Bureau of Arms Control, Verification, and Compliance at the Department of State, where coordinated the Department’s inputs for the Biden Nuclear Posture Review. 

Previously, he was a fellow in the Nuclear Policy Program at the Carnegie Endowment for International Peace, where his research focused on U.S. nuclear posture, arms control policy, and Congress' role in arms control. He served for several years at the U.S. Department of State coordinating policy on the New START and INF treaties, and joined numerous arms control delegations. He has testified before the House Committee on Foreign Affairs and before the congressional U.S.-China Economic and Security Review Commission.