Thomas Delong headshot
Thomas DeLong, PhD
Philip J. Stomberg Professor of Management Practice, Harvard Business School

Thomas J. DeLong is a senior fellow and former Philip J. Stomberg Professor of Management Practice in the Organizational Behavior area at the Harvard Business School. Since 1997 DeLong has taught 15,000 MBA’s and Executives both on campus and throughout the world. He is internationally recognized for his teaching ability, his books and course development. 

His most recent book Flying without a Net was recognized by the editors of Amazon Publishing as one of the top ten books written on leadership this century.

Before joining the Harvard Faculty, DeLong was Chief Development Officer and Managing Director of Morgan Stanley Group, Inc., where he was responsible for the firm’s human capital and focused on issues of organizational strategy and organizational change. He also served on the Board of Harvard Business School Publishing, Mt. Holyoke College, De La Salle Academy, Analysis Group and Arrowstreet Capital Management.

At Harvard, DeLong teaches MBA and executive courses focused on leadership, organizational behavior, managing human capital, and career management. He has served as course head for the required course on Leadership and Organizational Behavior. 

DeLong co-authored two books focused on leading professional service firms, When Professionals Have to Lead: A New Model for High Performance (Harvard Business School Press, 2007) and Professional Services: Cases and Texts (McGraw-Hill/Irwin 2003). DeLong has coauthored two Harvard Business Review articles, “Let's Hear It for B Players” and “Why Mentoring Matters in a Hypercompetitive World”.

Professor DeLong received his undergraduate and master’s degrees from Brigham Young University and his Ph.D. from Purdue University in Industrial Supervision.  He received a post-doctoral fellowship from Massachusetts Institute of Technology. He is the father of five daughters.