| 1/09-present | Full Professor | Department of Physics and Astronomy |
| Louisiana State University | ||
| Baton Rouge, Louisiana | ||
| 8/97-12/08 | Full Professor | Department of Physics |
| 9/95-8/97 | Associate Professor | University of Cincinnati |
| 9/90-8/95 | Assistant Professor | Cincinnati, Ohio, 45221 |
| 3/94-6/94 | Visitor | Inst. for Theor. Physics |
| 9/99-12/99 | Santa Barbara, California | |
| 12/90-12/99 | Consultant | Los Alamos National Labs. |
| Theoretical Division | ||
| Los Alamos, NM 87545 | ||
| 10/87-9/90 | Postdoc | Department of Physics |
| Ohio State University | ||
| Columbus, Ohio, 43210 |