| Year | Position | Institution |
| 1949 | Associate Professor Of Physiology | Georgetown University School Of Medicine 4 |
| 1950 | Associate Professor Of Physiology And Biophysics | Georgetown University School Of Medicine 4 |
| 1951 | Physiologist | National Institutes Of Health 4 |
| 1953 | Head Of Cellular Physiology | National Institute Of Mental Health 4 |
| 1957 | Physiologist | National Institutes Of Health 4 |
| Year | Subject | Role |
| 1949 | Indendent | |
| 1950 | Independent | |
| 1951 | Independent Investigators | |
| 1953 | Independent Investigators | |
| 1957 | Independent |