Who is Gabrielle Haddad?

Executive Officer, Director at Sigma Ratings

Where does Gabrielle Haddad work?

Gabrielle Haddad is Founder of Sigma Ratings.

What companies did Gabrielle Haddad found?

Gabrielle Haddad founded Sigma Ratings.

Where did Gabrielle Haddad go to school?

Gabrielle Haddad studied at Massachusetts Institute of Technology (Master of Business Administration (M.B.A.), Innovation and Global Leadership); Harvard Kennedy School; The George Washington University Law School (Doctor of Law (J.D.), Law).

Gabrielle Haddad

Founder

Founder at Sigma Ratings

New York City Metropolitan Area

FoundedSigma Ratings

Find your path to Gabrielle

3,018 people in our graph share verified history with Gabrielle — schools, employers, funds. One of them is your warm intro.

John KatzenmeyerunlockedGabrielle: together at Sigma360 (2023–2026)

×5Gabrielle: together at Martin Trust Center for MIT Entrepreneurship

×6Gabrielle: together at Hustle Fund

Founder at Sigma Ratings

Intro paths

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In turn, Gabrielle can intro founders to Sigma Ratings's investors below.

Sigma Ratings's investors · 4

Contour Venture PartnersNew York · $500K – $2M checks · since 2018 FinTech CollectiveNew York City · $100K – $10M checks · since 2018 Mosaik PartnersSan Francisco · $2M – $7M checks · since 2018 TechstarsBoulder · $220K checks · since 2018

Co-founders at Sigma Ratings

Robert Stuart Jones, Jr.Executive Officer, Director

Experience

Self-employedStartup Advisor and Founder Coachcurrent2020 — present
Sigma360Co-Founder, Board Member and Senior Advisorcurrent2023 — present
Sigma Ratings, Inc.Co-Founder, Chief Operating Officer and Board Member2017 — 2023Greater New York City Area
Hustle FundAngel Squad Membercurrent2023 — present
TechstarsMentorcurrent2021 — presentNew York City Metropolitan Area
Martin Trust Center for MIT EntrepreneurshipMentor & Coachcurrent2020 — presentCambridge, Massachusetts, United States
Jewel TonedBoard Member2013 — 2018
Martin Trust Center for MIT EntrepreneurshipGoss Fellow2017Cambridge, Massachusetts
MIT Sloan Fellows ProgramMIT Sloan Fellow in Innovation and Global Leadership2016 — 2017
PossibleBoard Member2014 — 2016
The Global FundLegal Officer2011 — 2015Geneva Area, Switzerland
Milbank LLPAssociate in the Global Corporate / Mergers & Acquisitions Department2006 — 2011New York, New York
Acumen FundFellow2010New York, New York
Board of Governors of Federal Reserve SystemLaw Clerk2004Washington D.C. Metro Area

Skills & more

Strategic LeadershipStrategic InitiativesBoard of DirectorsOperational StrategyFundraisingEarly-Stage StartupsGo-to-Market StrategyExecutive CoachingFinTechOperational ExcellenceTeam MotivationGlobal Strategy

+12 more

Emerging MarketsCross-functional Team LeadershipBusiness DevelopmentRelationship BuildingTeam ManagementEntrepreneurshipKey Performance IndicatorsEnterprise SoftwareSales & MarketingOperations ManagementFinancial ServicesAcquisition Integration

Languages English

Inner MBA - Mindful Leadership — New York University
Bar Membership New Jersey
Bar Membership New York
Series 62 License — Financial Industry Regulatory Authority (FINRA)

From Gabrielle's professional profile.

Frequently asked questions

Who is Gabrielle Haddad?: Executive Officer, Director at Sigma Ratings
Where does Gabrielle Haddad work?: Gabrielle Haddad is Founder of Sigma Ratings.
What companies did Gabrielle Haddad found?: Gabrielle Haddad founded Sigma Ratings.
Where did Gabrielle Haddad go to school?: Gabrielle Haddad studied at Massachusetts Institute of Technology (Master of Business Administration (M.B.A.), Innovation and Global Leadership); Harvard Kennedy School; The George Washington University Law School (Doctor of Law (J.D.), Law).

Founder mafias

Techstars mafia2,377

Also came through, then founded or led a company.

Brad FeldCo-founderFounded Techstars David CummingsTechstars Boulder Accelerator 2012Founded Undaunted +7 Gleb ChuvpiloTechstars Boston Accelerator 2014Founded Thor Directed Energy +6 Fritz LanmanTechstars New York City Accelerator 2012Founded Doppler Labs +3 Ben LammMentor & InvestorFounded Breaking +3 David RipleyFounder - Selected Company (Glidera)Founded Techstars +3

+ 2,370 more →

Massachusetts Institute of Technology mafia1,422

Also came through, then founded or led a company.

Elad GilPhDFounded Brain Co. +1 Hemant TanejaS.B.Founded Hippocratic AI Nat FriedmanBachelor of ScienceFounded Xamarin Brad FeldS.B.Founded Techstars Matt HuangB.S.Founded Paradigm +1 Delian AsparouhovDropoutFounded Nightingale +1

+ 1,415 more →

Techstars mafia366

Also came through, then founded or led a company.

Jeremy AchinCloud Class 2013Founded Neo Cybernetica +2 Ari TullaMentorFounded Elo Health +2 Brandon PatonMentorFounded Glider +2 Weiting LiuMentorFounded Everyday.me +2 David RipleyFounder - Selected Company (Glidera)Founded Glidera +2 Andrew BuseyMentor / InvestorFounded Hypergiant +2

+ 359 more →

Harvard Kennedy School mafia147

Also came through, then founded or led a company.

Andrey ZarurGlobal PolicyFounded GreenLight Pandemic Response +3 Ryan BuckleyMPPFounded Scripted +2 Mike MoradiGlobal Leadership and Public Policy for the 21st CenturyFounded Southwest Nanotechnologies +1 Will OngkowidjajaMaster of Public Administration - MPAFounded Honest +1 Ameer SherifGlobal Leadership and Public Policy for the 21st CenturyFounded Wuzzuf +1 Nicole JunkermannExecutive Certificate in Public PolicyFounded Nicole Junkermann’s personal website +1

+ 140 more →

Villanova University mafia64

Also came through, then founded or led a company.

Jane H. HollingsworthDoctor of Law (J.D.)Founded Eliksa Therapeutics +2 Ryan SimonettiBachelor of Business Administration (B.B.A.)Founded Convene +1 Mike MaherMaster of Business Administration (MBA)Founded Benjamins Desk +1 Michael DeCesareBachelor of Arts (B.A.)Founded Abnormal Ai +1 Jason MeresmanProject Management (PMP Certified)Founded Growth Hackers +1 Tiffanie StanardBusinessFounded Stimulus +1

+ 57 more →

Same school

Also attended Massachusetts Institute of Technology2,000

Hemant TanejaCEO & Managing Director of General Catalyst Nat FriedmanCo-lead of Meta Superintelligence Labs; co-founder of NFDG Brad FeldCo-founder of Foundry and Techstars Matt HuangCo-founder and Managing Partner at Paradigm Delian AsparouhovPartner at Founders Fund and co-founder of Varda Drew HoustonCo-founder & CEO of Dropbox

+ 1,994 more

Also attended Harvard Kennedy School361

Jeremy PhilipsInvestor at Spark Capital Mike MoradiGeneral Partner at Cortado Ventures Andrew ForysiakOwner, AJF and Associates at Riphean Investments Douglas Lemott Jr.Vice President, SAP National Security Services at Riphean Investments Gayatri SarkarFounder and CEO at Advaita Capital Ms. BakkerManaging Director and Founder at Longitude Capital

+ 355 more

Also attended The George Washington University Law School48

Gisella de la RochaVice President of Legal at MPM BioImpact Aniqua BokhariLegal Counsel at Red Cell Incubation Phil NolanGeneral Partner at Blue Delta Capital Matt HarbaughCo-Founder and Managing Director at Mountain State Capital Christopher HallPartner at Oxford Investment Consultants LLP Shawn CatonPrincipal at Decisive Point

+ 42 more

Also attended Villanova University213

Connor HillAssistant Controller at Greycroft Eric JohnsonInvestor at Khosla Ventures Jessica MayerClient Team Member at Generation Investment Management Andrea CambriaPrincipal, Head of Valuation at TCV Deb TraversEntrepreneur-In-Residence at The Innovation Space Kaki CaceresVice President, Finance at Stripes

+ 207 more

Shared employers

Also worked at Sigma3604

John KatzenmeyerPartner at Mosaik Partners Jon ZanoffFounder at Stella Ventures Stuart Jones, Jr.Founder at Sigma360 Randal SkipperFounder at Sigma360

Also worked at Hustle Fund50

RaoulInvestor at Eudemian Ventures Mike SherbakovGeneral Partner at The Veteran Fund Sarah RomankoAssociate at Geek Ventures Yeo Chee HiongSenior Associate, Southeast Asia at Jungle Ventures Elizabeth YinCo-founder and General Partner at Hustle Fund, a pre-seed fund for software entrepreneurs Shiyan KohSingapore-based early stage VC at Hustle Fund

+ 44 more

Also worked at Martin Trust Center for MIT Entrepreneurship25

Scott MaxwellInvestor at OpenView Venture Partners Rhie LimPartner, Global Strategy at One Way Ventures Michal Gilon-YanaiPartner at Two Lanterns Venture Partners Elaine ChenAdvisor at Cybernetix Ventures Gleb ChuvpiloManaging Partner at Thundermark Capital Will SanchezVenture Partner at Thundermark Capital

+ 19 more

Also worked at MIT Sloan Fellows Program2

Yusuke OkadaExecutive Officer at Dentsu Digital Holdings Diego VillegasCo-founder at Slang