MIT: 1994-1996 (first Postdoc)
Princeton University: 1991-1996 (Visitor, Graduate student, first Postdoc)
MIT: 1994-1996 (first Postdoc)
University of California, Berkeley: 1996-1998 (second Postdoc/Lecturer)
University of Colorado, Boulder: 1998-2005 (Assistant Professor)
 | Fermilab: | 2005-... (Scientist, Senior Scientist) |
 | University of Chicago: | 2005-... (Associate Professor, Professor) |