Reuben E. Brigety II is an American diplomat and academic who has served as the United States ambassador to South Africa since August 2022. He was the vice-chancellor and president of the University of the South, in Sewanee, Tennessee, from 2020 to 2021. Previously, Brigety served as dean of the Elliott School of International Affairs at George Washington University. Prior to that, Brigety has served as United States ambassador to the African Union, as a deputy assistant secretary of state, and as permanent representative to the United Nations Economic Commission for Africa.