Libby Keefer joined Hughes Hubbard's partnership in 1992 from the government, where she held a senior position in the Office of the Legal Adviser at the United States Department of State and was later Deputy Undersecretary of the United States Air Force, International Affairs. Her achievements in government posts include the reorganization for the Air Force of its international functions and offices, and many negotiations on behalf of the United States relating to U.S. interests overseas, including water rights in the Middle East, military base negotiations in Asia and Europe and the claims of American citizens against foreign governments. While with Hughes Hubbard's Washington, D.C. office, Keefer represented individuals seeking restitution for property taken by the Nazi regime. She served as the General Counsel of Teledyne, Inc, a technology company based in Los Angeles, Ca., and since 1997, she has been the General Counsel to Columbia University.