Boris Toucas is a visiting fellow with the Europe Program at CSIS. Prior to joining CSIS, he served at the nuclear nonproliferation and disarmament office of the French Ministry of Foreign Affairs from 2013 to 2016 and was responsible for nuclear deterrence and ballistic missile defense as a member of the Warsaw Summit negotiating team. During this period, he also focused on the North Korean proliferation crisis. From 2007 to 2013, he was an officer at the French National Court of Asylum in charge of examining refugee status applications on appeal. He holds a M.A. in international relations and political science from the Bordeaux Institute of Political Studies.