From 1908 to 1920 Landsteiner was prosector at the Wilhelminenspital in Vienna and in 1911 he was sworn in as an associate professor of pathological anatomy.
De 1908 a 1920, Landsteiner foi prosector no Wilhelminenspital de Viena, e en 1911 prestou xuramento como profesor asociado de Anatomía patolóxica.