Schneiderman, Rose (shnĪˈdərmən) [key], 1884–1972, American labor leader, b. Poland. She emigrated to the United States in 1890. After working as a lining stitcher in a cap factory, she was instrumental in getting women admitted to the United Cloth, Hat, and Cap Makers Union and participated (1905) in a successful strike. Probably the best-known American woman trade unionist, she was elected (1907) vice president of the New York branch of the Women's Trade Union League and was its sole organizer (1917–19) in the Eastern states. She was subsequently elected president (1918) of the New York branch and became (1928) national president of the National Women's Trade Union League. She served also as secretary (1937–44) of the New York state department of labor. In addition she was an official of the National Recovery Administration in the 1930s and a member of President Franklin Delano Roosevelt's brain trust.