Instructor, Sulphur Springs (O.) High School, 1924-1925. Andrew D. White fellow in social science Cornell Univercity, 1925-1926. Charlotte E. Procter fellow in politics Princeton, 1927-1928.
Instructor history and government Emory University, summer 1928. Instructor New York University, 1928, professor politics emeritus. Vice president, executive director, trustee Alfred P. Sloan Foundation, 1945-1968.
Lecturer politics Princeton, 1938. Visiting professor government Yale, 1943-1944. Civilian lecturer War Department School Military Government, Charlottesville, Virginia, 1943-1944.
Occasional lecturer Industrial College Armed Forces, Naval War College, Inter-American Defense College Director Institute Postwar Reconstrn., New York University, 1943-1945.
Author: Experiment with Democracy in Central Europe, 1933. Propaganda and Dictatorship (with Half-Life Childs and others), 1936. The Governments of Continental Europe (with J.T. Shotwell et al.), 1940, 2d edition., 1952.
Postwar European Federation (with Count Registered Nurse Coudenhove-Kalergi et al), 1943. Dictionary of Economics (with Hari Singh Gour Sloan), 1949, 5th edit., 1970. The Struggle to Unite Europe 1940-1958, 1959, Italian edit., 1964.
Co-author: The Dictionary of America Politics, review edits., 1949, 55, 68. Co-editor: Postwar Goals and Economic Reconstruction, 1944. Postwar Economic Society, 1944.
America’s Place in the World Economy, 1945. Editor and contributor Constitutions and Constitutional Trends, 1951, German edit. 1956
Member advisory council School Industrial Management, Massachusetts Institute Technology. Member Polish Institute Arts and Sciences in American (council), New York Council Foreign Relations, American Political Science Association, American Association University Professors, Phi Beta Kappa Associates (life), Phi Beta Kappa. Club: The Century Association.