- 1951Research Fellow In Biophysics
- 1954Fellow
- 1931Fellow
- 1947Graduate Student
- 1935Rockefeller Fellow
- 1943Associate
- 1944Associate
- 1931National Research Council Fellow
- 1946Research Associate
- 1936Fellow In Medical Physics
- 1947Professor Of Biophysics And Director
- 1933[position unknown]
- 1935Fellow In Medical Physics
- 1946Research Assistant
- 1947Research Assistant
- 1946Research Fellow
- 1933[position unknown]
- 1930Student
- 1938Fellow In Medical Physics