Instructor in history, College City New York, 1922-1923. Instructor in social science, Hunter College, 1924-1925. Assistant professor economics, University of Chicago, 1926.
Financial economist, National Industrial Conference Board, 1926-1930, professor business administration, Bernard M. Baruch School Business and Public Administration, College University New York, 1932-1964, retired. Consultant New York, United States Treasury, 1942, New York State Tax Commission, 1943. Prentice-Hall Inc., 1944.
President, American Management Counsel Company, 1946-1948. Marketing and management consultant.