[4] For his Ph.D, Sadowsky attended the University of Hawaii, completing his PhD dissertation titled, "Physiological, serological, and plasmid characterization of fast-growing rhizobia that nodulate soybeans"[5] in the laboratory of B. Ben Bohlool.
[6] Sadowsky performed his postdoctoral research at McGill University,[7] where he met his wife Suzanne.
[3] Sadowsky developed an analysis technique to distinguish between animal and human E. coli in waterways,[8][9] work that was ultimately featured in Time (magazine).
[10] He also studied the mechanisms underlying the resolution of recurrent C. difficile infection treated with fecal microbiota transplant;[11][12] the development of standardized protocols for preparing frozen samples for fecal microbiota transplant;[13] and a novel symbiosis mechanism between soil bacteria and legumes.
[14] He also holds 10 patents for technology related to his research,[4] and was the editor of the textbook The Fecal Bacteria.