| Year | Position | Institution |
| 1991 | University Of Houston 4 | |
| 1993 | University Of Houston 4 | |
| 1994 | University Of Houston 4 | |
| 1995 | University Of Houston 4 |
| Year | Role | Course |
| 1991 | Faculty | Molecular Evolution 1991 |
| 1993 | Faculty | Workshop On Molecular Evolution 1993 |
| 1994 | Faculty | Workshop On Molecular Evolution 1994 |
| 1995 | Director | Workshop On Molecular Evolution 1995 |