1957-61 Sloan Foundation Research Fellow
1961 Guggenheim Fellow(declined)
1961- Fellow, American Physical Society
1972 U.S.Organizing Committee, XIIIth International
Conference on Low Temperature Physics
1973 Chairman, Gordon Conference on Quantum Fluids and Solids
1978-83 Member, Cottrell Program Advisory Committee, Research Corporation
1980 National Organizing Committee, 16th International
Conference on Low Temperature Physics
1980-81 Guggenheim Fellow
1993- North American Editor Contemporary Physics