Jan Geldmacher
InvestorVenture Partner at Impact Venture Capital
New York, New York
Writes $500K – $2.5M checks · typically $1.5M
FoundedCornamiInfinadeck
Experience
- CIVCGeneral Partnercurrent2021 — presentSacramento, CA
- Deutsche GigaNetz GmbHChairman Of The Board Of Administrationcurrent2020 — presentHamburg, Hamburg, Germany
- EMnifyMember of the Board of Directorscurrent2022 — presentBerlin, Germany
- Gabriel Advisors, LLCManaging Directorcurrent2025 — present
- InfinadeckMember Board Of Directorscurrent2021 — presentRocklin, California, United States
- Movius Corp.Operating Advisorcurrent2021 — presentNew York, United States
- Cornami, Inc.CEO and Chairmancurrent2026 — presentCampbell, CA
- Cornami, Inc.Board Member2019 — 2026Campbell, CA
- LiveOak FiberChairperson2022 — 2026Brunswick, GA
- INTILION GmbHMitglied des Aufsichtsrats2022 — 2026Paderborn, North Rhine-Westphalia, Germany
- TelenorMember of the Board of Directors2023 — 2025Oslo, Oslo, Norway
- Reliance Communications, Orbic North AmericaHead Of Strategy2021 — 2023New York, United States
- Skylo TechnologiesMember Board Of Directors2021 — 2023
- Boston DynamicsMember Board Of Directors2021 — 2022Waltham, Massachusetts, United States
- SoftBank Group InternationalOperating Partner2020 — 2021New York City Metropolitan Area
- SprintPresident, Sprint Business2017 — 2020Greater New York City Area
- SprintPresident Enterprise2016 — 2017Overland Park, Kansas
- Vodafone Global EnterpriseCEO2012 — 2016
- VodafoneDirector of Enterprise Business Unit2008 — 2012
- BT GermanyCEO2005 — 2008
Education
- University of Cologne
Skills & more
Telco30Business Strategy99Mobile Communications99Mobile Devices99Mobile Technology99Product Management82Solution Selling51Strategic Leadership41Strategic Partnerships84Telecommunications99Unified Communications77VoIP33
+3 more
WirelessManaged ServicesGo-to-market Strategy- Hauptgespraech 128, Baden-Badener Unternehmergespraeche e.V. (BBUG) — Baden-Badener Unternehmer Gespräche e.V. (BBUG)
From Jan's professional profile.
Deals · 2
InfinadeckBoard seat
via Impact Venture Capital · filed Oct 2025 · $1.5M raise
CornamiBoard seat
via Impact Venture Capital · filed Aug 2025 · $40M raise
Attribution from SEC filings, press coverage, and firm rosters.
Colleagues at Impact Venture Capital
Aaron Anderson
Principal at Impact Venture Capital
Eric Ball
Founding General Partner at Impact Venture Capital
Gary Hooper
Venture Partner at Impact Venture Capital
Jack Crawford
Founding General Partner at Impact Venture Capital
Jean Mou
Partner at Impact Venture Capital
John Finegan
Venture Partner at Impact Venture Capital
Karen Crawford
Investor at Impact Venture Capital
Patrick Bumpus
Investor at Impact Venture Capital
Network2
Aaron Anderson
Principal at Impact Venture Capital
Gary Hooper
Venture Partner at Impact Venture Capital
Investors connected to Jan in public investor directories — a warm-intro map.
Frequently asked questions
- Where does Jan Geldmacher work?
- Jan Geldmacher is Venture Partner at Impact Venture Capital.
- What check size does Jan Geldmacher write?
- Jan Geldmacher typically writes checks of $500K – $2.5M.
- What companies did Jan Geldmacher found?
- Jan Geldmacher founded Cornami, Infinadeck.
Same school
Also attended University of Cologne49
Andrea GazviniAssociate at NorthzoneJohann FriederichAssociate at Notion CapitalNicolas El BazeSenior Advisor at Partech VenturesMarkus MerzInvestment Manager at CapnamicDavid KuczekInvestor at HV CapitalAdrian FriederichPrincipal, Investment at FoodLabs
+ 43 more
Shared employers
Also worked at Cornami, Inc.2
Also worked at Sprint28
Matt KrnaVenture Advisor at Alpha PartnersStephen MarcusCo-Founder and General Partner at Riot VenturesRandy CoxManaging Director, Value Creation at Five Elms CapitalJohn H. WillmothFounder and Managing Partner at Poplar VenturesJulius GenachowskiVenture Partner at Overture ClimateChad LegerCFO & Operating Partner at BrandProject Capital
+ 22 more
Also worked at Vodafone Global Enterprise4
Also worked at Vodafone84
Antonio TurroniOperating Advisor at P101 VenturesSimon SegarsExecutive Advisor at Black Opal VenturesLirui DingPrincipal at TRANSCENDEren BaydemirExperts | Product Management at 212Marcos OsórioDirector, Cyber at Bright Pixel CapitalSherihan MostafaOffice Manager at DisrupTech Ventures
+ 78 more
























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