After his postdoctorate at WHOI, Luyendyk was appointed there as Assistant Scientist. Aschbacher only became interested in finite simple groups as a postdoctorate. After receiving her doctorate, Fraser worked at two different locations as a postdoctorate fellow. Shields postdoctorate grant also funded her to develop an outreach program. From 1967 to 1968, he performed postdoctorate work at Yale University. She then conducted a postdoctorate at M.I.T.'s Center for Space Research, working with Claude Canizares. He completed postdoctorate work in physics with James Franck and Arnold Sommerfeld. She then proceeded to do a postdoctorate at the University of Pennsylvania (1992-1994).