 He has served on the Association of American Law Schools Committee on Nominations.He is also a member of the American Law Institute (ex officio), the Council on Foreign Relations, the American Society of International Law, the board of directors of the IMAX Corporation and the editorial board of Foundation Press.As Dean of Columbia Law School, Leebron approximately doubled the annual giving and the school's endowment, enhancing financial aid and support for students who enter public service.