| 2015 to Present | President and CEO, Kelvin Thermal Technologies, Inc. |
| 2014 to Present | Editor, ASME Journal of Electronic Packaging |
| 2011 to Present | S.J. Archuleta Endowed Professorship |
| 2006 to 2012 | Director, DARPA Center for Integrated Micro/Nano-Electromechanical Tranducers |
| 2006 to 2012 | Administrative Director, Nanomaterials Characterization Facility |
| 1999 to Present | Professor, Mechanical Engineering |
| 2001 to 2002 | Acting Director, CAMPmode, 麻豆影院, Colorado |
| 1993 to 2002 | Associate Director, CAMPmode, 麻豆影院, Colorado |
| 1993 to 1999 | Associate Professor, Mechanical Engineering |
| 1989 to 1993 | Assistant Professor, Mechanical Engineering |
| 1984 to 1989 | Member of Technical Staff, AT&T Bells Lab-Murray Hill |
| 1980 to 1984 | Research Assistant, University of Minnesota |
