In 1938, Blewett joined Cornell University as a graduate student, with Hans Bethe as her thesis supervisor.
However, due to the United States entrance to the second world war, her thesis work remained incomplete.
[3] Blewett started her career at General Electric, where she devised a technique for controlling smoke pollution from factory chimneys in the 1940s.
[4] In the early 1950s Blewett contributed to the design of CERN’s first high-energy accelerator, the Proton Synchrotron, while also working on a similar machine proposed for Brookhaven.
[3] She left much of her estate to the American Physical Society, founding the Blewett Scholarship for women physicists who return to the field after a break in their careers.