David Hafemeister was a CISAC affilate and 2005-2006 CISAC science fellow. He is a professor (emeritus) of physics at California Polytechnic State University. He spent a dozen years in Washington as professional staff member for Senate Committees on Foreign Relations and Governmental Affairs (1990-93 on arms control treaties at the end of the Cold War), science advisor to Senator John Glenn (1975-77), special assistant to Under Secretary of State Benson and Deputy-Under Secretary Nye (1977-78), visiting scientist in the State Department's Office of Nuclear Proliferation Policy (1979), the Office of Strategic Nuclear Policy (1987) and study director at the National Academy of Sciences (2000-02).
He has also held appointments at Carnegie Mellon, MIT, Stanford, Princeton, and the Lawrence-Berkeley, Argonne and Los Alamos national laboratories. He was chair of the APS Forum on Physics and Society (1985-6) and the APS Panel on Public Affairs (1996-7). He has written or edited ten books and 140 articles and was awarded the APS Szilard award in 1996.