She joined the graduate program at the Rockefeller University in 1972, where she worked alongside Robert Bruce Merrifield (1984 Nobel Prize in Chemistry) on the synthesis of peptides.
[citation needed] In the 1980s, Mojsov moved to the Massachusetts General Hospital, where she was made head of a peptide synthesis facility.
She arrived at MGH shortly after Joel Habener had cloned proglucagon by studying anglerfish found in Boston Harbor.
[2][3] Together with Gordon Weir at the Joslin Diabetes Center in Boston and Habener, Mojsov showed that small quantities of lab-synthesized GLP-1 could trigger insulin.
[4][5] In the 1990s, Mojsov returned to New York City, where she went back to Rockefeller University and the laboratory of Ralph M. Steinman (2011 Nobel Prize in Physiology or Medicine).