Find your path to Jack
54 people in our graph share verified history with Jack — schools, employers, funds. One of them is your warm intro.
Jesse MiddletonunlockedJack: together at Tech:NYC (2025–2026)
×3Jack: together at Return Path
×4Jack: together at Tech:NYC
×2Jack: together at Stack Exchange
Executive at Stack Exchange
Intro paths
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In turn, Jack can intro founders to Stack Exchange's investors below.
Stack Exchange's investors · 5
Co-founders at Stack Exchange
AJ
Avram Joel SpolskyExecutive Officer, Director
MH
Michael Howard PryorExecutive Officer, Director
Experience
- Tech:NYCConsultantcurrent2025 — presentNew York, New York, United States
- AttendConsulting CFO at Attendcurrent2025 — present
- BolsterCo-founder and CFO2020 — 2025New York, United States
- Self-EmployedConsultant2020
- LRNChief Financial Officer2019 — 2020Greater New York City Area
- Return PathCFO2018 — 2019Greater New York City Area
- Stack OverflowChief Financial Officer2014 — 2018Greater New York City Area
- Return PathCo-founder and CFO2008 — 2014Greater New York City Area
- Return PathCOO2004 — 2008New York, NY
- Return Path, IncVP Finance1999 — 2004
- Financial Resource GroupManaging Director1998 — 1999Greater New York City Area
- Periscope SystemsCo-founder1996 — 1997Greater New York City Area
- Stern Stewart & Co.Senior Analyst1993 — 1996
Skills & more
MergersFinancial ModelingDue DiligenceAccounts ReceivableFinancial AnalysisStart-upsMicrosoft ExcelCross-functional Team LeadershipCorporate DevelopmentMergers & AcquisitionsFinancial ReportingSaaS
+12 more
BudgetsStrategyStrategic PlanningM&A experienceForecastingAnalyticsBusiness PlanningStrategic PartnershipsVenture CapitalBusiness StrategyFinanceManagementFrom Jack's professional profile.
Frequently asked questions
- Who is Jack Sinclair?
- Executive Officer at Stack Exchange
- Where does Jack Sinclair work?
- Jack Sinclair is Executive at Stack Exchange.
- Where did Jack Sinclair go to school?
- Jack Sinclair studied at The Wharton School (BS, Finance); University of Pennsylvania; Xaverian Brothers High School.
Same school
Also attended The Wharton School2,000
Sarah GuoFounder & General Partner of ConvictionJosh KopelmanFounder and Partner at First Round CapitalAydin SenkutFounder & Managing Partner at FelicisJack AbrahamFounder, CEO & Managing Partner of AtomicKatie RiesterPartner, Head of Investor Relations at Felicis VenturesTrevor OelschigInvestment Team at General Catalyst
+ 1,994 more
Also attended University of Pennsylvania1,417
Brian ActonCo-founder of WhatsApp; co-founder of Signal FoundationKunal BahlCo-founder of Snapdeal; co-founder of Titan CapitalDasha MaggioPartner at Felicis Ventures, writer on venture capital and founder psychologyNancy WangInvestor at Felicis VenturesLeah von SiemensPartner at Manta Ray VenturesEghosa OmoiguiFounder and Managing General Partner at EchoVC Partners
+ 1,411 more
Also attended Xaverian Brothers High School8
John MurphyCo-Founder & Partner at Hyperplane Venture CapitalAlex PhelanPrincipal at Updata PartnersPhil DudleyPartner at McCarthy CapitalDylan HendersonAccounting Manager at Digitalis VenturesJohn P. McLaughlinVice President at BrynwoodVidur KhatriPrincipal at ABRY Partners
+ 2 more
Shared employers
Also worked at Tech:NYC12
Jesse MiddletonGeneral Partner at Flybridge Capital PartnersJarrid TingleInvestor at Harlem Capital PartnersSerkan PiantinoVenture Partner at Floating PointMadi JacoxPrincipal at Dorm RoomRachel HaotChief of Staff at BedrockTanya BejaGeneral Partner at AlleyCorp
+ 6 more
