Assistant to the President of MIT1932-1936; Special Advisor to the Vice-President 1936-1937; Head of Department of Patents, Research Corporation 1937-1940; Assistant to Dr. V. Busch, National Defense Research Committee 1940-1942; Sloan School of Management, Lecturer 1959-1961; Professor of Management 1961-1974; Mitsui Professor 1974-1976; Professor Emeritus and Senior Lecturer 1976-1983.
