From 1976 to 1980, Goldsmith was an assistant professor and then Associate Dean at Loyola Marymount University's College of Business. He later served as a Professor of Management Practice at Dartmouth College's Tuck School of Business. In 1977, he entered the field of management education after meeting Paul Hersey, and Goldsmith later co-founded the management education firm Keilty, Goldsmith and Company. He became a founding partner of the Marshall Goldsmith Group, an executive coaching group. Throughout Marshall's career, he has worked with CEOs from over 200 companies.