Harvard College Observatory
From 1956-1964, Weeks was a physicist at the Watertown Arsenal and the technical representative for the Committee on Radioactive Shielding. In 1964, she worked for the NASA supported Solar Satellite Project at the Harvard College Observatory. She would continue to work as at Harvard as a spectroscopist, studying solar satellites at the Harvard College Observatory until she retired in 1976 at the age of eighty-three.