Stephen D. Mull is Vice Provost for Global Affairs at the University of Virginia. In this role he is the primary lead on global relations at the University, responsible for developing a strategic vision, designing outreach, and overseeing international activities. A career diplomat, he joined the Foreign Service in March 1982 and holds the rank of Career Ambassador, the highest rank in the U.S. Foreign Service. Ambassador Mull has served as Lead Coordinator for Iran Nuclear Implementation (2015-2017), leading U.S. government interagency efforts and diplomacy to implement the Joint Comprehensive Plan of Action (JCPOA) to constrain Iran’s nuclear program. Additionally, he served as the U.S. Ambassador to the Republic of Poland (2012-2015) and Lithuania (2003-2006). He also held a broad range of positions focused on U.S. national security and U.S. interests in countries undergoing volatile transitions to democracy including as Acting Assistant Secretary of State for Political-Military Affairs (2007-2008) and as Executive Secretary of the State Department (2010-2012), in which capacity he coordinated responses to a wide range of crises and managed the Department’s support for the Secretary of State.