About
Co-founder of M33 Growth who works with management teams on go-to-market expansion and strategic acquisitions. Formerly Chief Administrator/Acting GM of the MBTA and a managing director at General Catalyst; also worked at Bain & Company and H.I.G. Capital, and served as a Marine officer.
Contact· self-published, not guessed
Experience
- M33 GrowthCo-Founder & Managing Directorcurrent2017 — presentGreater Boston
- SwiftComplyBoard Membercurrent2025 — present
- BFC SoftwareMember Board of Directorscurrent2023 — present
- BrillionMember Board of Directorscurrent2023 — present
- PerformLineBoard Membercurrent2021 — present
- SmartKargoBoard Membercurrent2021 — present
- BeSmartee®Board Membercurrent2021 — present
- Titan Cloud Software, LLCBoard Of Directorscurrent2018 — present
- Belmont Hill SchoolBoard Membercurrent2017 — presentGreater Boston
- Massachusetts High Technology Council, Inc.Board Member2023 — 2025
- Pioneer Institute for Public Policy ResearchBoard of Directors2022 — 2025Boston, Massachusetts, United States
- RHI Group IncBoard of Directors2019 — 2023Greater Toronto Area, Canada
- ContruentBoard Member2021 — 2023
- L2LBoard Member2020 — 2022
- W Energy SoftwareBoard Of Directors2018 — 2022
- MBTAFiscal and Management Control Board2017 — 2020Boston, Massachusetts
- MBTAChief Administrator2015 — 2017Greater Boston Area
- Mass DOTBoard Of Directors2017 — 2020Greater Boston
- General Catalyst PartnersManaging Director2008 — 2015Cambridge, MA
- Envoy GlobalBoard Member2014 — 2015Greater Chicago Area
- OGSystemsBoard Member2014 — 2015Washington DC-Baltimore Area
- Oceans HealthcareBoard Member2012 — 2015Dallas-Fort Worth Metroplex
- AxiumBoard Member2012 — 2014Portland, Oregon Metropolitan Area
- CLEAResultBoard Member2010 — 2013Austin, Texas Metropolitan Area
- H.I.G. CapitalPrincipal2004 — 2008
- Bain & CompanyConsultant2001 — 2004
- Mitt Romney for Governor 2002Political Director2002
- US Marine CorpsCaptain1995 — 1999
.png)
Skills & more
Venture Capital85Start-ups45Business Strategy43Investments6Corporate Development17Valuation24Marketing Strategy4Private Equity75Leadership12Financial Modeling20Corporate Finance14Entrepreneurship18
+12 more
Strategic PlanningMergersMergers & AcquisitionsStrategyFundraisingBusiness DevelopmentManagement ConsultingDue DiligenceEnterprise SoftwareAlternative InvestmentsAnalyticsNew Business DevelopmentFrom Brian's professional profile.
Colleagues at M33 Growth
Frequently asked questions
- Who is Brian Shortsleeve?
- Co-founder of M33 Growth who works with management teams on go-to-market expansion and strategic acquisitions. Formerly Chief Administrator/Acting GM of the MBTA and a managing director at General Catalyst; also worked at Bain & Company and H.I.G. Capital, and served as a Marine officer.
- Where does Brian Shortsleeve work?
- Brian Shortsleeve is Founder at M33 Growth.
- Where did Brian Shortsleeve go to school?
- Brian Shortsleeve studied at Harvard Business School (MBA); Harvard University (BA, American History); Belmont Hill School.
Founder mafias
Harvard Business School mafia323
Also came through, then founded or led a company.
Mike Maples JrMBAFounded Pattern BreakersHristo BorisovOPM Class 64Founded PayhawkNoubar AfeyanVisiting LecturerFounded ProFound Therapeutics +12Wade MyersMBAFounded RealManage +5Harry GrunerFounded Hilos +2Ellen RubinMBAFounded ClearSky Data +2
+ 316 more
General Catalyst mafia16
Also came through, then founded or led a company.
Yuri SagalovManaging DirectorFounded AeroFS +1David ColtonVC Finance Co-opFounded AlgoUniversityKevin KingPartnerFounded LuceahealthGautam GuptaPrincipalFounded NatureBoxPrat MallickStrategic InitiativesFounded RiverbankGabe LingPartnerFounded M33Growth
+ 9 more
M33 Growth mafia5
Also came through, then founded or led a company.
Clearesult mafia2
Also came through, then founded or led a company.
Same school
Also attended Harvard Business School2,000
Brad GerstnerFounder & CEO of Altimeter CapitalAileen LeeFounder & Managing Partner of Cowboy VenturesTim DraperFounder of Draper AssociatesMamoon HamidPartner at Kleiner PerkinsNeeraj AgrawalGeneral Partner at Battery VenturesHristo BorisovCo-founder & CEO of Payhawk
+ 1,994 more
Also attended Harvard University1,559
Alfred LinPartner at Sequoia CapitalChris DixonFounder & Managing Partner of a16z crypto at Andreessen HorowitzSarah TavelVenture Partner at BenchmarkDanny RimerPartner at Index VenturesLaela SturdyManaging Partner at CapitalGBill GatesCo-founder of Microsoft; Chair of the Gates Foundation
+ 1,553 more
Also attended Belmont Hill School12
Sam BakerInvestor Relations at Scale Venture PartnersCameron ScariManaging Director at Renown Capital PartnersParker MundtPartner, Platform at Suffolk TechnologiesMack RushSenior Associate, Emerging Technologies at Suffolk TechnologiesJay PoCo-Founder and Managing Partner at Stage 2 CapitalAndrew BergInvestor at Companyon Ventures
+ 6 more
Shared employers
Also worked at BFC Software1
Also worked at Titan Cloud Software, LLC3
Also worked at Oceans Healthcare1
Also worked at H.I.G. Capital43
Tsendai ChagwederaPartner at EchoVC PartnersDavid CorreaChief Financial Officer and Chief Compliance Officer at Marlin Equity PartnersAbdo John HajjFounder of AJH Investments, a private investment office built for long-duration ownership.Tara NikkhooOperations Manager at Alpha EdisonGonzalo Sánchez-ArjonaInvestment Director at Kibo VenturesTimur AkazhanovGeneral Partner at B4 Capital
+ 37 more