American researcher. Ph.D. physics, University of California at Berkeley. Professional experience includes: Congressional Office of Technology Assessment (1983-1989, 1991-1995); Harvard University's Kennedy School of Government (1989-1991); White House (1996-2001); research staff, Institute for Defense Analyses (2001-2003); senior fellow for science and security, Center for Strategic and International Studies (2003-2009); director, Center for Science, Technology, and Security Policy, american Association for the Advancement of Science (AAAS) (2009-); assistant director for biosecurity and emerging technologies, White House Office of Science and Technology Policy (OSTP) (-2018); Nathonal Defense University's Center for the Study of Weapons of Mass Destruction (2018-).