Brian Shortsleeve

Brian Shortsleeve is passionate about helping founders and CEOs win in their markets by applying his experience driving operational excellence and executing strategic acquisitions.

Prior to founding M33, Brian served as the Chief Administrator and Acting General Manager of the Massachusetts Bay Transportation Authority (MBTA). He was handpicked by Governor Charlie Baker in 2015 to develop a plan to put the MBTA on the path to long-term fiscal sustainability. During his tenure, Brian led efforts to reduce the operating deficit, leverage technology and industry partnerships to modernize business processes and accelerate the pace of state-of-good-repair capital investment.

Before the MBTA, Brian spent 14 years in strategy consulting and investing at Bain & Company, H.I.G. Capital, and most recently, General Catalyst, where he served as a managing director and led investments in software and technology-enabled services companies. Brian served on the boards Axium Software (acquired by Deltek), CLEAResult (acquired by General Atlantic), Envoy Global, Oceans Healthcare, Oceans Healthcare, and OGSystems (acquired by Parsons).