- Chalmers Institute, Sweden. European Union post doctoral, 2000-2001.
- Georgia Institute of Technology. Visiting Assistant Professor, joint with Berkeley, 2001-2002.
- University of California at Berkeley
& Lawrence Berkeley National Lab. Post doctoral, 2002.
- New York University, Courant Institute, Research Associate, 2002-2003.
- University of Massachusetts at Amherst, Visiting Assistant Professor, 2003-2007.
- University of North Carolina at Charlotte, Assistant Professor, 2007-2010.