| Year | Position | Institution |
| 1939 | Johns Hopkins University 8 | |
| 1941 | Teaching Fellow In Embryology | California Institute Of Technology 4 |
| 1942 | Teaching Fellow | California Institute Of Technology 8 |
| 1943 | Instructor | Wesleyan University 8 |
| 1944 | Instructor In Biology | Wesleyan University 4 |
| 1947 | Assistant Professor Of Zoology | Yale University 4 |
| 1948 | Assistant Professor Of Zoology | Yale University 8 |
| 1949 | Assistant Professor Of Zoology | Yale University 8 |
| 1950 | Assistant Professor Of Zoology | Yale University 4 |
| 1951 | Assistant Professor Of Zoology | Yale University 4 |
| 1952 | Assistant Professor Of Zoology | Yale University 4 |
| 1953 | Associate Professor Of Zoology | University Of North Carolina 4 |
| 1954 | Associate Professor Of Zoology | Florida State University 4 |
| 1956 | Associate Professor Of Zoology | Florida State University 4 |
| 1957 | Associate Professor Of Zoology | Florida State University 4 |
| 1958 | Professor | Florida State University 4 |
| 1959 | Professor | Florida State University 4 |
| 1960 | Professor Of Zoology | Florida State University 4 |
| 1961 | Professor Of Zoology | Florida State University 4 |
| 1963 | Program Chairman | Florida State University 8 |
| 1964 | Program Chairman | Florida State University 8 |
| 1965 | Professor | Institute Of Molecular Evolution University Of Miami 4 |
| 1965 | Program Chairman | University Of Miami 4 |
| 1966 | Professor Of Zoology | University Of Miami 8 |
| 1967 | Program Chairman | University Of Miami 8 |
| 1968 | Professor | Institute Of Molecular Evolution 4 |
| 1968 | Program Chairman | University Of Miami 4 |
| 1969 | Professor Of Zoology | Institute Of Molecular Evolution 4 |
| 1969 | Program Chairman | University Of Miami 4 |
| 1970 | Professor Of Biology | Institute Of Molecular Evolution 4 |
| 1970 | Program Chairman | University Of Miami 4 |
| 1971 | Program Chairman | University Of Miami 8 |
| 1972 | Professor | University Of Miami 8 |
| 1973 | Professor Of Biology | University Of Miami 8 |
| 1974 | University Of Miami 4 | |
| 1975 | University Of Miami 8 | |
| 1976 | Professor | University Of Miami 4 |
| 1977 | Professor | University Of Miami 4 |
| 1978 | Professor | University Of Miami 4 |
| 1979 | University Of Miami 4 | |
| 1980 | University Of Miami 4 | |
| 1981 | University Of Miami 4 |
| Year | Subject | Role |
| 1941 | Beginners | |
| 1942 | Beginners | |
| 1943 | Independent | |
| 1944 | Independent | |
| 1947 | Independent Investigators | |
| 1948 | Independent | |
| 1949 | Indendent | |
| 1953 | Independent Investigators | |
| 1954 | Independent Investigators | |
| 1956 | Independent | |
| 1957 | Independent | |
| 1958 | Independent | |
| 1959 | Independent | |
| 1960 | Independent | |
| 1961 | Independent | |
| 1963 | Independent | |
| 1964 | Independent | |
| 1965 | Independent | |
| 1966 | Independent | |
| 1967 | Independent | |
| 1968 | Independent | |
| 1969 | Independent | |
| 1970 | Independent | |
| 1971 | Independent | |
| 1972 | Independent | |
| 1973 | Independent | |
| 1975 | Independent | |
| 1976 | Independent Investigators | |
| 1977 | Independent | |
| 1978 | Independent | |
| 1979 | Independent | |
| 1980 | Independent | |
| 1981 | Independent |
| Year | Location |
| 1968 | university of miami |
| 1969 | university of miami |
| 1970 | university of miami |