Hans Zinsser became an associate professor at Stanford University in 1910, and in 1913 he moved to a position at Columbia University where he was the doctoral advisor of Rebecca Lancefield, and finally ten years later he worked at Harvard Medical School where he stayed the rest of his career.
After holding a series of academic medicine positions, Zinsser became an associate professor at Stanford University in 1910. In 1913, he moved to a position at his alma mater. At Columbia, he was the doctoral advisor of Rebecca Lancefield, although he did not permit her to physically work in his laboratory due to her gender. Ten years later, Zinsser was hired by Harvard Medical School, where he stayed  except for service in the US Army Medical Corps in World War I  until his death. He received his undergraduate degree from Columbia University in 1899 and completed both a master's degree and a doctorate in medicine there in 1903. 
