· Amazon Scholar, Amazon Web Services (AWS)2020–
· Director, Institute for Quantum Information and Matter, California Institute of Technology2014–
· Richard P. Feynman Professor of Theoretical Physics, California Institute of Technology2010–
· Director, Center for the Physics of Information, California Institute of Technology2003–2011
· John D. MacArthur Professor, California Institute of Technology2002–2009
· Associate Professor of Theoretical Physics, California Institute of Technology1983–1990
· Associate Professor, Harvard University1982–1983
· Assistant Professor, Harvard University1981–1982
· Junior Fellow, Harvard Society of Fellows1980–1981
· Ph.D. in Physics, Harvard University1980–
· A.B. in Physics, Princeton University1975–