Martin J. Mannion

Board Vice Co-Chair; Managing Director, Summit Partners

Martin J. Mannion is a managing director of Summit Partners, a growth equity firm that invests in rapidly growing companies. Mannion joined Summit in 1985. Prior to Summit, he worked as a systems engineer at IBM Corporation. Based in Summit’s Boston office, Mannion is active in the firm’s investment activities in North America, Europe, and Asia.

During his 26 years with Summit Partners, Mannion has served as a director of many companies, including eight public companies. He is currently a director of Champion Windows, Liquidnet Holdings, NameMedia, and Sparta Systems. His prior directorships include AdvaCare (NASDAQ: AVCR, acquired by Medaphis), American Dental Partners (NASDAQ: ADPI), Bartlett Holdings (acquired by Harvest Partners), Clinical Pathology Laboratories (acquired by Sonic Healthcare), Employee Benefit Plans (NASDAQ: EBPI), ImageAmerica (became MedAlliance, NASDAQ: MDAL), Lincare Holdings (NASDAQ: LNCR), Litchfield Financial Corporation (NASDAQ: LTCH), and Pharmaco Dynamics Research (merged with Applied Bioscience International Inc., NASDAQ: APBI).

He holds an A.B. in economics from Princeton University and an M.B.A. from Harvard Business School. Mannion serves on the boards of Big Brothers Big Sisters of Massachusetts Bay and National Association of Basketball Coaches Foundation. He also sits on Harvard Business School Dean’s board of advisors and is a trustee of the Park School in Brookline, Massachusetts. Additionally, he serves on the board of advisors of Year Up, an intensive training program that provides urban young adults with a unique combination of technical and professional skills, college credits, an educational stipend, and corporate internship. Mannion’s past directorships include Children’s Hospital Trust of Boston and Regis High School in New York City.