C.S. Eliot Kang, a career member of the Senior Executive Service, currently serves as Acting Assistant Secretary, Bureau of International Security and Non-Proliferation at the U.S. Department of State. He also has been performing the duties of Under Secretary for Arms Control and International Security since January 2021. He has worked in the Bureau of International Security and Non-Proliferation since 2005 in a number of key positions, including Acting Assistant Secretary, Principal Deputy Assistant Secretary, Deputy Assistant Secretary and Special Adviser. Previously, he worked in the U.S. Department of State’s Bureau of Arms Control and Bureau of Political-Military Affairs. A former tenured professor, he taught international security at the University of Pennsylvania and Northern Illinois University and held fellowships at the Council on Foreign Relations and the Brookings Institution. Kang received his Ph.D. from Yale University. He also studied at Princeton University and received his A.B., summa cum laude, from Cornell University. Kang is the recipient of numerous Department awards, including a Presidential Rank Award. He speaks Korean and Japanese.