Primary Role
Managing Director at Summit Partners
Harvard Business School

Person Details


Martin J. Mannion joined Summit Partners in 1985. Prior to Summit, he worked as a Systems Engineer at IBM Corporation.

Based in Summit’s Boston office, Marty is active in the firm’s investment activities in North America, Europe and Asia.

During his 28 years with Summit Partners, Marty 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, taken private), 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, later acquired by The Linde Group), Litchfield Financial Corporation (NASDAQ: LTCH) and Pharmaco Dynamics Research (merged with Applied Bioscience International Inc., NASDAQ: APBI).

He holds an AB in economics from Princeton University and an MBA from Harvard Business School.

Marty 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. Marty also serves on the Advisory Board of the Alydar Funds. Marty’s past directorships include Children’s Hospital Trust of Boston and Regis High School in New York City.

Experience (1)