| Year | Position | Institution |
| 1960 | Oberlin College 4 | |
| 1964 | Postdoctoral | Systematics Ecology Program 4 |
| 1965 | Systematics-Ecology Program | Marine Biological Laboratory 4 |
| 1966 | Systeniatics-Ecology Program | Marine Biological Laboratory 4 |
| 1967 | Systematics-Ecology Program | Marine Biological Laboratory 4 |
| 1968 | Assistant Professor Of Geological Sciences | Lehigh University 4 |
| 1969 | Assistant Professor | Center For Marine And Environmental Sciences Lehigh University 4 |
| 1970 | Assistant Professor Of Geophysical Sciences | University Of Chicago 4 |
| 1971 | University Of Chicago 8 | |
| 1972 | University Of Chicago 8 | |
| 1973 | Associate Professor | University Of Chicago 8 |
| 1974 | Associate Professor | University Of Chicago 8 |
| 1975 | University Of Chicago 8 | |
| 1976 | Associate Professor | University Of Chicago 8 |
| 1977 | University Of Chicago 4 |
| Year | Role | Course |
| 1960 | Student | Zoology 1960 |
| 1964 | Postdoctoral Fellow/Research Associate | Systematics-Ecology Program 1964 |
| 1965 | Postdoctoral Fellow/Research Associate | Systematics-Ecology Program 1965 |
| 1966 | Postdoctoral Fellow/Research Associate | Systematics-Ecology Program 1966 |
| 1967 | Postdoctoral Fellow/Research Associate | Systematics-Ecology Program 1967 |
| 1970 | Special Lecturer | Experimental Invertebrate Zoology 1970 |
| 1971 | Special Lecturer | Experimental Invertebrate Zoology 1971 |
| 1972 | Instructor | Experimental Invertebrate Zoology 1972 |
| 1973 | Instructor | Experimental Invertebrate Zoology 1973 |
| 1974 | Instructor | Experimental Invertebrate Zoology 1974 |
| 1975 | Instructor | Experimental Invertebrate Zoology 1975 |
| 1976 | Instructor | Experimental Invertebrate Zoology 1976 |
| 1977 | Consultant | Experimental Invertebrate Zoology 1977 |
| Year | Subject | Role |
| 1964 | Independent | |
| 1965 | Independent | |
| 1966 | Independent | |
| 1967 | Library Readers | |
| 1968 | Independent | |
| 1969 | Independent | |
| 1971 | Independent | |
| 1972 | Independent | |
| 1973 | Independent | |
| 1974 | Independent | |
| 1975 | Independent | |
| 1976 | Independent Investigators |
| Year | Location |
| 1964 | ford foundation |