1989-1994: Graduate Research Assistant, Department of Physics, University of Illinois at Urbana-Champaign
1994-1996: Postdoctoral Research Associate, Department of Physics and Materials Research Laboratory, University of California at Santa Barbara
1996-1998: Staff Scientist, Motorola Phoenix Corporate Research Labs.
1998-1999: Senior Staff Scientist, Motorola Phoenix Corporate Research Labs.
1999-2005: Associate Professor, Professor, Department of Physics, University of Utah
2005-present: Professor, Department of Physics and Astronomy, University of California, Riverside
2006 (April-May): Visiting Professor, Hong Kong University of Science and Technology
2006 (May-July): Visiting Professor, Tohoku University, Japan
2006 (Nov-Dec): Visiting Professor, Ruhr University at Bochum, Germany
2007 (June-July): Visiting Professor, Fudan University, China
2010 (Aug-Sept): Siyuan Visiting Professor, Nanjing University, China
2012 (Feb-March): Visiting Professor, Hong Kong University of Science and Technology
2014 (June-Aug): Visiting Professor, CNRS/Ecole Polytechnique, France
2014-present: Director, Spins and Heat in Nanoscale Electronic Systems (SHINES), a DOE-funded Energy Frontier Research Center.
UC Presidential Chair Professor (2018-)
American Physical Society Fellow (2012)
IBM Faculty Award (2009)
Wang Kuan-Cheng Foundation/Chinese Academy of Sciences Research Award (2002, 2003)
Research Innovation Award (Research Corporation) (2000)