Jounce Therapeutics, Inc. announced the appointment of Perry A. Karsen to the company's board of directors. Over the next few months Mr. Karsen will transition to the role of chairman of the board, succeeding Cary Pfeffer, M.D., partner at Third Rock Ventures, who will retain a position on the Jounce board. Mr. Karsen brings more than 30 years of experience in the biopharmaceutical industry and recently retired from his role as chief executive officer of Celgene Cellular Therapeutics (CCT), the cell therapy research and development division of Celgene Corporation.

Mr. Karsen served as the chief executive officer of CCT since May 2013, previously serving as Celgene Corporation's executive vice president and chief operations officer.