After graduating from Radcliffe in 1938, Sinah Kelley took some graduate courses at
New York University, and worked at federal laboratories in Indiana, Pennsylvania, and Illinois during
World War II. She stayed in
Peoria, Illinois, after the war, with a team working on the mass production of
penicillin for the
U. S. Department of Agriculture. More specifically, she worked in the lab as part of the Fermentation Division, where she performed chemical analyses on sugar and other products of fermentation. Though Kelley did not hold an advanced degree, she was listed an author on several scientific papers from this group, with titles such as "Production of Fumaric Acid by
Rhizopus arrhizus" (1959) and "Production of Itaconic Acid by
Aspergillus terreus in 20-Liter Fermentors" (1952). In 1958, she returned to New York to work on the effects of
strontium 90, working with how to stabilize it with flame photometry at an
Atomic Energy Commission laboratory. She retired from that work in the 1970s. ==Personal life and legacy==