In 1913, he became Entomological Assistant at the Bureau of Entomology.
During the same year he became a member of the United States Department of Agriculture, his job was there as a field assistant, and at the same time he worked with the Bureau of Entomology and Plant Quarantine.
Federal Bureau of Investigation | Shanghai Railway Bureau | Bureau of Land Management | Central Bureau of Investigation | Bureau of Alcohol, Tobacco, Firearms and Explosives | Bureau of Indian Affairs | United States Census Bureau | Entomology | United States Bureau of Reclamation | Bureau of Meteorology | entomology | Citizens Advice Bureau | Better Business Bureau | Wuhan Railway Bureau | Federal Bureau of Prisons | Bureau of Engraving and Printing | National Guard Bureau | Bureau of Internal Revenue | Bureau of Plant Industry | The Adjustment Bureau | Japan Credit Bureau | Bureau of Meteorology (Australia) | Bureau of Labor Statistics | Bureau of American Ethnology | American Farm Bureau Federation | National Bureau of Economic Research | Elias Sports Bureau | United States Bureau of Mines | Prodromus Entomology | Oklahoma State Bureau of Investigation |
He was appointed field agent of the Bureau of Entomology, United States Department of Agriculture 1904-05, curator of invertebrate zoology in the Milwaukee Public Museum 1905-09, and then became instructor in economic entomology at Harvard University.