| Year | Position | Institution |
| 1971 | Amherst College | |
| 1972 | Professor Of Biology | Amherst College |
| 1973 | Professor Of Biology | Amherst College |
| 1974 | Professor Of Microbiology | Amherst College |
| 1975 | Amherst College | |
| 1976 | Amherst College | |
| 1977 | Professor Of Biology | Amherst College |
| 1978 | Amherst College | |
| 1978 | Executive Officer | University Of Connecticut |
| 1979 | University Of Connecticut | |
| 1980 | University Of Connecticut | |
| 1981 | University Of Connecticut | |
| 1983 | University Of Connecticut | |
| 1992 | University Of Connecticut | |
| 1995 | University Of Connecticut | |
| 1996 | University Of Connecticut | |
| 1997 | University Of Connecticut | |
| 1998 | University Of Connecticut | |
| 1999 | University Of Connecticut |
| Year | Role | Course |
| 1971 | Special Lecturer | Marine Ecology 1971 |
| 1972 | Instructor | Marine Ecology 1972 |
| 1973 | Instructor | Marine Ecology 1973 |
| 1974 | Instructor | Marine Ecology 1974 |
| 1975 | Instructor | Training Program In Microbial Ecology 1975 |
| 1976 | Instructor | Training Program In Microbial Ecology 1976 |
| 1977 | Instructor | Research Program In Microbial Ecology 1977 |
| 1978 | Instructor | Research Program In Microbial Ecology 1978 |
| 1979 | Faculty/Staff/Lecturer | Microbial Ecology 1979 |
| 1980 | Faculty/Staff/Lecturer | Microbial Ecology 1980 |
| 1981 | Faculty/Staff/Lecturer | Microbial Ecology 1981 |
| 1983 | Faculty/Staff/Lecturer | Microbial Ecology 1983 |
| 1992 | Lecturer | Microbial Diversity 1992 |
| 1995 | Director | Microbial Diversity 1995 |
| 1996 | Director | Microbial Diversity 1996 |
| 1997 | Director | Microbial Diversity 1997 |
| 1998 | Director | Microbial Diversity 1998 |
| 1999 | Director | Microbial Diversity 1999 |
| Year | Subject | Role |
| 1972 | Independent | |
| 1973 | Independent | |
| 1974 | Independent | |
| 1975 | Independent | |
| 1976 | Independent Investigators | |
| 1977 | Independent | |
| 1978 | Independent |