[2][7] After the Sorbonne, while Hamilton was a student at Johns Hopkins University, Landsberg became the Reference Librarian at the Reynolds' Library, Rochester, New York.
[6] In 1899 Clara Landsberg became a resident at Hull House, where she was in charge of the adult education (evening school) programs from 1900 to 1920,[8] and shared a room with Alice Hamilton.
[12] In May 1914, Landsberg, together with Louise DeKoven Bowen, joined Addams and Mary Rozet Smith in Naples, and the four women travelled together to Sicily and Rome.
[3][9][2] Landsberg eventually left Hull House to teach Latin at Bryn Mawr School, where Edith Hamilton was headmistress.
"[2] Landsberg, the Hamilton sisters and Edith's companion, Doris Fielding Reid, spent their retirement years in Hadlyme, Connecticut, at the house they purchased in 1916.
Cynthia Francis Gensheimer, "A Tale of Many Cultures: Clara Landsberg's Experiences at Hull House with Eastern European Jewish Immigrants and White Anglo-Saxon Protestant Social Workers."