Stephen Mull is Vice Provost for Global Affairs at the University of Virginia. He has served in a broad range of U.S. national security positions, most recently as Acting Under Secretary for Political Affairs at the U.S. Department of State, working as the day-to-day manager of overall regional and bilateral policy issues, and overseeing the bureaus for Africa, East Asia and the Pacific, Europe and Eurasia, the Near East, South and Central Asia, the Western Hemisphere, and International Organizations. He served as lead coordinator for Iran Nuclear Implementation from August 2015 until August 2017 and was the U.S. Ambassador to the Republic of Poland and the Republic of Lithuania. He has been both Executive Secretary of the State Department and the Senior Advisor to Under Secretary of State for Political Affairs. He has also recently served as Resident Senior Fellow at Georgetown University's Institute for the Study of Diplomacy.