 From 1915-18 he was the Kapellmeister at the Hamburg Opera and worked from 1918 to 1919 as a conductor at the National Theatre in Brno and Ostrava.From 1920-30, he was a composition teacher at the Prague Conservatory, and principal conductor of the Czechoslovak Radio Orchestra until 1945.In 1947, he emigrated to the United States, where from 1948 to 1967 a professor at Roosevelt University, Chicago, and, in 1967, a composition teacher at the Conservatory college in Chicago.