Professor Kim has been teaching contract, tort, property law at Korea University Law School since 2003. Before moving to Korea, he was a College Lecturer at Cambridge University. He is a member of the Korean Bar Association, with frequent involvement (either as an expert witness or as an arbitrator) in international arbitrations. He is currently a member of KCAB Court of International Arbitration. He was formerly a member of the Civil Code Reform Commission appointed by Justice Minister of Korea. His academic publications cover various topics on Korean contract law. He authored several books including a monograph Aliens in medieval law: the origins of modern citizenship (Cambridge University Press, 2000).