| Year | Position | Institution |
| 1976 | Visitingscientist | Nincds National Institutes Of Health And University Of Peurto Rico 4 |
| 1977 | Ipa Biologist | Lnns Nincds 4 |
| 1983 | University Of Maryland 4 | |
| 1984 | University Of Maryland School Of Medicine 4 | |
| 1985 | University Of Maryland School Of Medicine 4 | |
| 1986 | University Of Maryland 4 | |
| 1987 | University Of Maryland School Of Medicine 4 | |
| 1989 | University Of Maryland School Of Medicine 4 | |
| 1990 | University Of Maryland 4 | |
| 1992 | University Of Maryland 4 | |
| 1994 | University Of Maryland School Of Medicine 4 |
| Year | Subject | Role |
| 1976 | Summer Research Scholarships (Steps Toward Independence) | |
| 1977 | Independent | |
| 1983 | Independent | |
| 1984 | Independent | |
| 1985 | Independent | |
| 1986 | Independent | |
| 1987 | Independent | |
| 1989 | Independent | |
| 1990 | Other Research Personnel | |
| 1992 | Other Research Personnel | |
| 1994 | Other Research Personnel |
| Year | Location |
| 1977 | national institutes of health |
| 1983 | baltimore |
| 1990 | baltimore |
| 1992 | baltimore |