Formerly: Dean, Graduate School of International Studies, Yonsei University; Chairman, Presidential Committee, Northeast Asian Cooperation Initiative, a cabinet-level post; Ambassador for International Security, Ministry of Foreign Affairs and Trade, Korea; Adjunct Professor, Asia-Pacific Studies Institute, Duke University; President, Korea Peace Research Association. Editor-in-Chief, Global Asia, a Seoul-based magazine. Member of the Board: Korea Foundation; East Asia Foundation; International Peace Foundation. Member: Pacific Council on International Policy, Los Angeles; Institute of International Strategic Studies, London. Author of over 40 books and 230 articles.