Harvard University - Professor of Astronomy
Years: 1984-1987
University of Utrecht - Professor of Astrophysics
Years: 1983-1984
University of Chicago - Professor of Astronomy and Astrophysics
Years: 1980-1983
NASA Goddard - Postdoctoral Researcher
Years: 2009-2012
Email address
Univ. de Chile - Assistant Professor
Years: 2010-2012
MIT - Assistant Professor
Years: 2006-2011
University of Wisconsin, Milwaukee - Asst. Professor
Years: 2008-2009
Caltech - Postdoctoral researcher
Years: 2007-2010
Shanghai Jiao Tong University - Associate Professor
Years: 2006-2009
ASIAA - Research Scientist
Years: 2003-2006
Northwestern - Associate Professor
Years: 2002-2005
Monash University - Lecturer
Years: 1999-2002
Fermilab and University of Chicago - Scientist and Associate Professor of Astronomy
Years: 1996-1998
University of Virginia - Professor of Astronomy
Years: 1993-1996
Ohio State University - Professor of Astronomy and Ohio Eminent Scholar
Years: 1990-1993
Stanford University - Professor of Physics
Years: 1987-1990
