Law clerk, Hon. Julian Mack, U.S. Court of Appeals for the Seventh Circuit, 1930-1931
Assistant U.S. attorney, Southern District of New York, 1931-1933
Private practice, New York City, 1933-1935, 1946-1971
Deputy assistant district attorney, New York County, New York, 1935-1938
Assistant district attorney, New York County, New York, 1938-1942
U.S. Army lieutenant colonel, Office of Strategic Services, 1942-1946
Assistant, Hon. Robert H. Jackson, chief U.S. prosecutor, Nuremberg Trials, 1945
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