 He left the hospital in 1934 following upheaval in Nazi Germany and entered private practice, left for England in the spring of 1939, and on to Melbourne in July.He was offered a position as a biochemist by Charles Kellaway Director of the Walter and Eliza Hall Institute; he also taught biochemistry and organic chemistry at the Melbourne Technical College and later at the University of Melbourne.In 1945 he became a naturalized British citizen.