We bring experience and understanding of the business-building process that we believe can help entrepreneurs achieve their vision.

We are business builders

M33 was born out of the idea that to truly catapult a business to the next level, entrepreneurs need a partner that has two key qualities: operating experience and the empathy derived from an understanding what it takes to build a great company.

We have worked together for nearly a decade and combine strategy, operating and investing experience gained at a number of well-respected firms.


Brian Shortsleeve

Managing Director

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

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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 of Axium Software (acquired by Deltek), CLEAResult (acquired by General Atlantic), Envoy Global, Oceans Healthcare, and OG Systems.

Brian is a Massachusetts native, graduate of Harvard College and Harvard Business School, and served as a Marine officer in Bosnia-Herzegovina and the Persian Gulf. He has been named one the 50 Most Influential People in Boston by the Boston Business Journal and The Boston Globe named him to the “2016 Game Changers” list, which recognizes leaders doing extraordinary things to reshape life and work in the greater Boston area.



Gabe Ling

Managing Director

Gabe Ling brings a zeal for entrepreneurship to the M33 founding team. Over his career, he has helped launch startups and taken an active operational role with several portfolio companies. A seasoned growth equity investor with a focus on technology, data services, and healthcare, Gabe has experience in helping teams drive growth and create valuable data assets.

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Most recently, Gabe was a partner at General Catalyst, where he led investments in growth stage companies in the software, business services, and healthcare services and IT sectors. He served on several boards, including Datalogix (acquired by Oracle), CLEAResult (acquired by General Atlantic), Oceans Healthcare, OGSystems, and Brighter (acquired by Cigna).

Prior to General Catalyst, Gabe attended Yale University, where he graduated with a B.A. in Economics and worked at the Yale Investments Office, which manages the university’s endowment and is recognized as a pioneering institutional investor. He was recognized by the Greater Boston Chamber of Commerce as a 2016 recipient of the Ten Outstanding Young Leaders (TOYL) award for civic and business leadership and is an alumnus of Harvard Business School’s Young American Leaders Program, which convenes leaders from around the country to foster cross-sector collaborations that impact local communities. Gabe currently serves on the United Way PE/VC Leadership Council and works on the organization’s early childhood development initiatives



Mike Anello 

Managing Director

Mike Anello is dedicated to helping growth-oriented businesses maximize their operations by applying his extensive sales and marketing expertise to portfolio companies.

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Prior to M33, Mike served as vice president at Valor Equity Partners, where he focused on implementing sales and marketing best practices across the firm’s portfolio. Before this, Mike led business development for Axium Software (acquired by Deltek), where he led acquisitions and helped double the size of Axium’s sales and marketing engine in less than two years. Mike has worked with several companies to optimize and streamline their sales and marketing efforts, including Illumio Software, Tesla Motors, Manduka, Porch, and Project44. He was also a cofounder of Cleverlayover. Mike worked with Gabe and Brian while at General Catalyst, where he focused on software and healthcare opportunities.

Mike graduated from the University of Notre Dame summa cum laude. He walked on to the Notre Dame Football Team, eventually earning a scholarship and two-time Academic All-American Honors. Mike received his MBA from Harvard Business School. While there, he partnered with Shikhar Ghosh and Mark Roberge to build a playbook around best practices for scaling sales teams from $10 million to $100 million in revenue.

Mike’s passion for giving back led to the launch of Boston’s inaugural St. Baldrick’s Event, a pediatric oncology research foundation. Since, then he has led more than 10 events in four cities.



Garrett Levey


Garrett Levey works closely with founders who are bootstrapping and striving to accelerate the trajectory of their businesses.

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Prior to M33, Garrett was an investor at Wavecrest Growth Partners where he focused on growth stage B2B software and tech-enabled services companies, and was actively involved with the firm’s investment in Building Engines. Prior to Wavecrest, Garrett was an investment banker at Deutsche Bank where he helped public and private software companies grow through raising capital and executing mergers and acquisitions. Select transaction experience includes Dell and Silver Lake Partners’ acquisition of EMC, GTCR’s acquisitions of Cision, Vocus and PR Newswire, and the sale of Skillsoft to Charterhouse Capital Partners and subsequent acquisition of SumTotal Systems.

Garrett graduated from Cornell University with a B.A. in Philosophy. He is actively involved with the Combined Jewish Philanthropies and has served as a Mentor with BUILD Boston, which helps under-resourced high school students learn about entrepreneurship through starting their own businesses.



Arjun Bhimavarapu


Arjun Bhimavarapu is passionate about helping healthcare entrepreneurs innovate, create value and build lasting businesses that achieve better care at lower cost.

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Prior to M33, Arjun helped co-found and served as Vice President of Sales and Marketing for Hometeam, a tech-enabled home care provider in New York. In that role, Arjun established the marketing, sales and business development functions while growing revenues from $0M to $15M+ in under two years. Before this, Arjun was an investor at Bain Capital Ventures focusing on investing & building high-growth software and tech-enabled services businesses. Arjun helped lead investments in Billtrust, Booker and Kenshoo and worked actively with portfolio executives on a variety of strategic projects.

Arjun graduated with a B.S. in Finance and Operations / Information Management from The Wharton School at the University of Pennsylvania and was project leader with the Social Impact Consulting Group. A Massachusetts native, Arjun is an avid Boston sports fan that is well aware of the ongoing 17-year luck streak.



Jenna Ciotti


Jenna is passionate about working with entrepreneurs to accelerate growth and position them for industry excellence.

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Prior to M33, Jenna was a management consultant at The Ripples Group, where she helped shape strategy alongside senior management teams predominantly for healthcare companies, as well as clients in the automotive and agriculture industries. An example of her work at Ripples includes spearheading the statewide implementation of a SaaS-based prescription monitoring IT system for a Department of Public Health. Her efforts included engaging with an extensive ecosystem of stakeholders ranging from industry leading medical professionals, government organizations, and regulators.

Jenna graduated from Yale University with a B.S. in Psychology and earned her Masters in Public Health in Epidemiology – Social & Behavioral Science from the Yale School of Public Health. At Yale, her studies were focused on the epidemiology of chronic diseases primarily in underserved communities and across youth populations. She has extensive experience developing behavioral intervention models for community-based clinics, and is passionate about disease management through lifestyle intervention. While at Yale, Jenna was a member of the Yale Women’s Ice Hockey team. She is actively involved in the Big Sister Association of Greater Boston, a non-profit organization focused on providing positive mentoring relationships with young girls from underserved communities. In her spare time, Jenna enjoys running, getting outside, and spending time with her little sister.



AJ Hellow


AJ Hellow brings extensive experience partnering with founder-owned, high growth technology businesses.

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Before joining M33, AJ worked at Bowen Advisors focusing on mergers and acquisitions and strategic fundraises on behalf of emerging technology companies. During his time at Bowen, AJ collaborated closely with the management teams of iControl Networks (connected home technology) Oz Development (application integration solutions), and Targit (business intelligence and analytics software).

AJ is a graduate of The Johns Hopkins University with a B.A. in International Studies, Minors in Economics and Global Environmental Change and Sustainability, and was also a pitcher on the baseball team. In his spare time he likes to stay active by golfing, skiing, and surfing when the water isn't too cold.



Ross Geiger


Ross Geiger brings experience working with B2B software and technology-enabled services businesses to accelerate growth.

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Before joining M33, Ross was at B2B SaaS and services provider, Catalant Technologies. At Catalant, Ross was tasked by leadership to help start the company’s standalone SaaS business as the company scaled from 30 to 180 employees in 2.5 years. During his time at Catalant, Ross held a variety of roles in Business Development, Sales, and Solution Engineering. Prior to Catalant, Ross was a management consultant at Altman Vilandrie & Co., a Tech/Media/Telecom focused consultancy based in Boston. At Altman Vilandrie & Co., he worked with Fortune 500 clients to develop go-to-market and M&A growth strategies, in addition to supporting private equity investors with acquisition due diligence.

Ross graduated with honors from Brown University in East Asian Studies and Economics. At Brown, Ross was a DI athlete on the Cross-Country and Track & Field teams. He was also on the Leadership Team of Athletes in Action and served as President of the Brown Collegiate Consulting Group, which provides pro-bono consulting services for local non-profits in the greater Providence/Boston area.