Dr. Choi is the dean of Planning and Assessment at the Korean National Diplomatic Academy. He holds several advisory board memberships including: the Committee on Foreign Affairs, Trade, and Unification of the National Assembly; the Ministry of National Defense; the Ministry of Unification; the Air Force Development Committee; and the National Unification Advisory Council. Previously, Dr. Choi worked at the Institute for Foreign Affairs and National Security as a professor and director-general for American Studies. From 1992 to 1998, and from 2002 to 2005, Dr. Choi worked in the Korea Institute for Defense Analyses. From 1998 to 2002, he served in the National Security Council Secretariat as senior director for Policy Planning and Coordination. He was also a South Korea delegate to the Four-Party Talks. He received his Ph.D. from the Ohio State University.