- 1929Associate Nematologist
- 1930Associate Nematologist
- 1931Associate Nematologist
- 1904Physiologist, Bureau Of Plant Industry
- 2003[position unknown]
- 1902Assistant In Pathology
- 1932Junior Poulty Biologist
- 1932Poultry Biologist
- 1898First Assistant Entomologist
- 1992[position unknown]
- 1929Nematologist
- 1930Agricultural Technologist And Nematologist
- 1931Principal Nematologist
- 1994[position unknown]
- 1904Physiologist And Algologist
- 1905Physiologist And Algologist
- 2003[position unknown]
- 1997[position unknown]
- 1929Junior Botanist
- 1981[position unknown]
- 1904Physiologist
- 1992[position unknown]
- 1899Pathologist
- 2009[position unknown]