Sang Hyun Lee is a senior research fellow at the Sejong Institute in Korea. He also serves as President of the Korea Nuclear Policy Society (KNPS). He received his B.A. and M.A. from Seoul National University and Ph.D. from the Department of Political Science at the University of Illinois at Urbana-Champaign in 1999. 

He was a research fellow at the Korean Institute for International Studies (1987-88), the Korea Institute for Defense Analysis (1988-90), and policy advisor for Ministry of Foreign Affairs, Ministry of National Unification, and Ministry of National Defense. He has served as Director-General for Policy Planning, Ministry of Foreign Affairs (MOFA) from May 2011 to April 2013. He is a member of Asia-Pacific Leadership Network (APLN) for Nuclear Nonproliferation and Disarmament, and Korea-US Nuclear Policy Leadership Initiative (NPLI). He has been a visiting scholar at Institute for Development and Security (ISDP) in Stockholm, Sweden, and Stimson Center in Washington DC.

Sang Hyun Lee's main research interests include international politics and security, Korea-U.S. relations, inter-Korean relations, nuclear security and nonproliferation, and East Asian security issues. His recent publications include: “Prospects for the Biden Administration’s Foreign Policy” (2021), South Korea’s Foreign Policy in the Era of U.S.-China Strategic Competition (2020, co-authored), “Trump Administration’s Nuclear Policy: Implications for Global Nuclear Energy and North Korean Nuclear Issue” (2019), “Trump Administration’s National Security Policy and Its Implications for Global Order and Korean Peninsula” (2018), Trump Administration and ROK-US Relations (2017, co-authored), North Korea under Kim Jong-un: Evaluating Past Five Years (2017, co-authored), and so on.

International Politics; International Security; Korea-US Relations; Security issues in Northeast Asia; War and Disputes; Military Security