Loh taught mathematics and physics from 1925 to 1948, at Ginling College,
Central University, and
Hunan University. the
American Association of Physics Teachers, and the
American Physical Society. During the
Nanjing Massacre in 1927, Loh warned foreign faculty at Ginling College of the approaching danger: "It was she who went to every laboratory and class room and ordered foreign teachers to the faculty house at once," recalled a fellow Wellesley alumna. She also retrieved the contents of the college safe, and organized emergency clothing for the evacuees. She was mentioned in missionary
Minnie Vautrin's diary, conferring with Vautrin and
Wu Yi-fang about the school's future. Loh returned to the United States in 1948, and taught mathematics and physics at Wellesley College,
Smith College,
Wilson College,
Western College for Women. From 1956 to 1964, she worked as a physicist at the
Wright-Patterson Air Force Base. == Personal life ==