Nominated by President Joe Biden and unanimously confirmed by the U.S. Senate, David L. Cohen served as the United States Ambassador to Canada from 2021 to 2025. Before his tenure in the State Department, Ambassador Cohen served as Senior Advisor to the CEO and Senior Executive Vice President of Comcast NBCUniversal.

Ambassador Cohen previously served as a partner in and Chairman of Ballard Spahr Andrews & Ingersoll, LLP.  From January 1992 to April 1997, Ambassador Cohen served as Chief of Staff to the Honorable Edward G. Rendell, the Mayor of the City of Philadelphia.

Ambassador Cohen currently serves as Chair of the Board of The Philadelphia Citizen Media Group, as a trustee of the board of the Philadelphia Orchestra and Ensemble Arts, as a member of the board and executive committee of The Chamber of Commerce for Greater Philadelphia, and as an Honorary Trustee of the Barnes Foundation. He is also serving as a member of the board of the Joe and Jill Biden Foundation.

Ambassador Cohen has received numerous awards for his civic and charitable activities, including six honorary Doctor of Laws degrees, including one from the University of Pennsylvania. A native of New York and raised in New Jersey, Ambassador Cohen graduated with a B.A. from Swarthmore College in 1977 and with a J.D. from the University of Pennsylvania Law School summa cum laude in 1981. Ambassador Cohen lives in Philadelphia with his wife, Rhonda R. Cohen.