From 1941 to 1949, he was head of the cello department at the Curtis Institute of Music in Philadelphia, and he also taught at Tanglewood, Boston University, and the University of Southern California, where he remained until his death.
Från 1941 till 1949 var han chef för celloavdelningen vid Curtis Institute of Music i Philadelphia, och undervisade vid Tanglewood, Boston University och University of Southern California, där han stannade fram till sin död.