Professor Lee received his education from Tufts University and the University of Oxford. He has lectured throughout the United States and Japan and remains an advisor to the Ministry of Foreign Affairs and the National Security Council. He is active in the Korean community, serving as a member of numerous associations and committees related to international security, academic exchange, and political organizations. His expertise lies in North Korean nuclear history, U.S. foreign policy, South Korean politics, and East Asian security relations. He is currently serving as the Dean of the Division of International Education and Exchange at Yonsei.