Fundraising Fox

Martin Willemink

Founder

Co-founder at Segmed

San Diego, California, United States

FoundedSegmed · YC

About

Martin Willemink is co-founder and CEO of Segmed, which provides structured, de-identified medical imaging data and multimodal datasets to support AI and healthcare research.

Co-founder at SegmedYC W20

Intro paths

YC

Martin went through Y Combinator (Winter 2020) — any YC alum in your network can reach them through the YC community.

→

In turn, Martin can intro founders to Segmed's investors below.

Segmed's investors · 8

Blumberg CapitalMiami · $500K – $5M checks · since 2022ExpeditionsWarsaw · since 2022iGan PartnersToronto · $365K – $2.2M checks · since 2024Mighty CapitalSan Francisco · since 2022Nina CapitalBarcelona · $215K – $1.6M checks · since 2022NovaCapitalsince 2022South Quadsince 2022Y CombinatorSan Francisco · $500K checks · since 2020

Co-founders at Segmed

JWJie Wu
Jie WuFounder
MJ
Marinus Johannes WilleminkExecutive Officer, Director
WA
Wojciech Adam KoszekExecutive Officer, Director
CH
Cailin HardellFounder
CK
Cailin KramerFounder

Experience

  1. Segmed, Inc.Co-Founder & Chief Scientific Officercurrent2025 — presentSan Diego, California, United States
  2. Segmed, Inc.Co-Founder & CEO2022 — 2025San Diego, California, United States
  3. Segmed, Inc.Co-Founder2019 — 2022Mountain View, California, United States
  4. European Society of RadiologyJunior Deputy Editor (European Radiology)current2019 — presentVienna, Austria
  5. Stanford University School of MedicineInstructor (Junior Faculty)2019 — 2022San Francisco Bay Area
  6. Stanford University School of MedicinePostdoctoral Researcher2017 — 2019San Francisco Bay Area
  7. ArterysConsultant2018 — 2019San Francisco Bay Area
  8. UMC UtrechtRadiology Resident2015 — 2017Utrecht Area, Netherlands
  9. UMC UtrechtPhD Student2012 — 2015Utrecht Area, Netherlands
  10. PhilipsSpeaker Bureau Lecturer2014 — 2016Eindhoven Area, Netherlands
  11. The Mount Sinai HospitalFulbright Scholar2014 — 2015New York, The United States
  12. Mastin DesignFounder & UI Designer2005 — 2009

Skills & more

Medicine25Medical Imaging26Graphic Design8Research25Public Relations3Photography2Life Sciences3English7Management1Clinical Research11Healthcare1Radiology1
+12 moreRSPSSScienceBiomedical EngineeringMedical DevicesComputed TomographyEntrepreneurshipStatisticsLeadershipBusiness DevelopmentMachine LearningData Analysis
  • SIIM - Hackathon 2022 Winner — Society for Imaging Informatics in Medicine (SIIM)
  • Introduction to Marketing — The Wharton School
  • Good Clinical Practice (GCP) — Stanford University
  • Verified Peer Reviewer — Publons
  • Fellow of the Society of Cardiovascular Computed Tomography (FSCCT) — Society of Cardiovascular Computed Tomography

From Martin's professional profile.

Frequently asked questions

Who is Martin Willemink?
Martin Willemink is co-founder and CEO of Segmed, which provides structured, de-identified medical imaging data and multimodal datasets to support AI and healthcare research.
Where does Martin Willemink work?
Martin Willemink is Co-founder of Segmed.
What companies did Martin Willemink found?
Martin Willemink founded Segmed.
Where did Martin Willemink go to school?
Martin Willemink studied at Y Combinator (W20); Stanford University Graduate School of Business (Stanford Ignite Winter 2019, Business Administration and Management); Utrecht University (Doctor of Philosophy (PhD), Medical Imaging).

Founder mafias

Y Combinator mafia8,773

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+ 8,766 more

Y Combinator mafia4,716

Also came through, then founded or led a company.

Ryan SheaEntrepreneurshipFounded StacksTarek MansourFounded KalshiSuhail DoshiEating beans & riceFounded Playground +1Subomi OluwalanaW22Founded ConvoyDarius "Bubs" MonsefS19Founded Sightbox +3Matthew ScholzFounded Oisin Biotechnologies +3

+ 4,709 more

Stanford University Graduate School of Business mafia267

Also came through, then founded or led a company.

Steve JurvetsonMaster of Business Administration (MBA)Founded Mojo VisionTony XuMBAFounded DoorDashDavid VélezMBAFounded NubankMatt RouifStanford Ignite (Summer Institute for Entrepreneurship)Founded Photoroom +3IanMaster of Business Administration (M.B.A.)Founded Immunity Project +2Mikhail KokorichStanford Executive ProgramFounded Destinus +2

+ 260 more

University of Groningen mafia12

Also came through, then founded or led a company.

Remco van ZantenMsCFounded Zalando +1Herman KienhuisMScFounded Curiosity VCGjalt HuismanDoctor of Philosophy - PhDFounded Embold TherapeuticsJeroen KimmelsEconometricsFounded Future Food FundCoen BosMaster’s DegreeFounded HelinArnoud Aalbersbergn/aFounded CarePlus

+ 5 more

Utrecht University mafia7

Also came through, then founded or led a company.

Maarten EngelenArtificial IntelligenceFounded HiberSachin ShahExchangeFounded KindlingGiulio CantoroSummer SchoolFounded Blink Last MileEmiel van LiereMasterFounded QuestRoeland NusselderBachelor's degreeFounded PlumeraiMax WellingPhDFounded CuspAI

Same school

Also attended Y Combinator2,000

Tarek MansourCo-founder & CEO of KalshiSuhail DoshiFounder of Mixpanel; founder of ParticleSubomi OluwalanaCo-founder & CEO of ConvoyMaroof AhmedFounder at Octopus VenturesJustin SwartPartner at Bitkraft Esports VenturesCollin WallaceGeneral Partner at Lobby Capital

+ 1,994 more

Also attended Utrecht University91

René KuijtenInvestor at LSP (Life Sciences Partners)René R. KuijtenInvestor at LSP (Life Sciences Partners)Matthijs BlokhuisDirecteur at NoaberRoel DekkersInvestment manager at NoaberIrene KrijgsmanProgramma manager at NoaberMarlene van LooProgramma manager at Noaber

+ 85 more

Also attended University of Groningen137

Ragnar JongenInvestor at DN CapitalGizem CakilInvestor at OpenView Venture PartnersYtsen van der MeerPrincipal at Cottonwood Technology FundJelle Van de PutteFund Administrator at Capricorn Venture PartnersLaura LentzExecutive Assistant at Castle Island VenturesChristophe de MontillePartner at Beyond Capital Ventures

+ 131 more

Also attended University of Twente29

Alain le LouxGENERAL PARTNER at Cottonwood Technology FundDaan BoekhoudtInvestment Analyst at Cottonwood Technology FundLucas VassaloInvestor at Riverwood CapitalRichard PietersExecutive & Growth Leader at Joyance PartnersWouter JonkCo-Founder & Partner at SET VenturesJanne JuholaPartner, Innovestor Venture Capital at Innovestor Ventures

+ 23 more

Shared employers

Also worked at Segmed, Inc.2

Sebastian AnastassiouPartner at Nina CapitalBrad JonesPrincipal at SE Ventures

Also worked at Stanford University School of Medicine125

Josephine ChenInvestor at Sequoia CapitalJeffrey FinerVenture Partner at Third Rock VenturesFrancisco GimenezInvestment Team at 8VCLan JiangPartner at Lux CapitalJeffrey DeFlavio, MDEntrepreneur in Residence at AlleyCorpLily RaakaStrategist at Plum Alley Investments

+ 119 more

Also worked at Arterys1

Sandra MillerVenture Partner at Fresco Capital

Also worked at Philips104

Paul van OoikInvestment associate at NoaberLidwi van OsProgram & Office Support Officer at NoaberIdil KavakliExperts | Venture Partner at 212Daniel GrafGeneral Partner at redalpineRuben OsnabruggePartner & Chief Medical Officer at 415 CapitalNeelam DhawanTech Industry Trailblazer at SenseAI Ventures

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