 After completing his graduate studies, he held faculty positions at Queen's University (1915–1918) and Denison University (1918–1924), before beginning a 30-year teaching career at Harvard University in 1924.For a period of time during his tenure at Harvard, he served as chairman of the geology department.In addition to his teaching duties at Harvard, he served as the Director of the Harvard Summer School from 1933 through 1938.