 In 1916, she took a position at the Imperial Ministry of Health (Kaiserliches Gesundheitsamt), later the Reich's Ministry of Health (Reichsgesundheitsamt).After 1919, she led the Protozoa Laboratory in Berlin-Dahlem and continually served as one of the few women on the advisory board, sometimes the only one.From 1926 to 1929, she was invited by the Dutch government to carry out a research study on "Weil's disease" in the Dutch Indies, specifically in Bali, Sumatra, and Java.