Assistant research physicist department physics University Michigan, Ann Arbor, 1977—1979, assistant professor physics, 1979—1984. Associate professor physics University Colorado, Boulder, 1984—1987, fellow Joint Institute Laboratory Astrophysics (JILA), 1985—2006, professor physics, 1987—1997, Distinguished research professor, 1997—2006, director Science Education Initiative, since 2006. Professor physics, director Carl Wieman Science Education Initiative (CWSCI) U British Columbia, Vancouver, since 2007.
Associate director for science Office Science & Technology Policy (OSTP), Executive Office of the President, Washington, since 2010. Rosenthal Memorial lecturer Yale University, 1988, Columbia University, 1988. Loeb lecturer Harvard University, 1990—1991.
Cherwell-Simon Memorial lecturer Oxford University, 1999.
Fellow: American Physical Society (Davisson-Germer prize 1994, Schawlow prize in laser science 1998). Member: National Academy of Sciences, American Association for the Advancement of Science, American Association Physics Teachers (Richtmyer lecturer award 1996, Oersted medal 2007), Optical Society America (R.W. Wood prize 1999).