Fundraising Fox

Roger de Belsunce

Founder

Founder at sizeless

Berkeley, California, United States

Foundedsizeless · YC

About

Roger de Belsunce earned a PhD in astrophysics from the University of Cambridge.

LinkedIn ↗

Founder at sizelessYC S23

Intro paths

YC

Roger went through Y Combinator (Summer 2023) — any YC alum in your network can reach them through the YC community.

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In turn, Roger can intro founders to sizeless's investors below.

sizeless's investors · 1

Y Combinator

Co-founders at sizeless

CVCornelius von Einem
Cornelius von EinemFounder

Experience

  1. Massachusetts Institute of TechnologyPostdoctoral Researchercurrent2025 — presentBoston, Massachusetts, United States
  2. sizelessCo-Foundercurrent2023 — present
  3. University of California, BerkeleyPostdoctoral Researcher2022 — 2025
  4. Berkeley LabPostdoctoral Researcher2022 — 2025
  5. McKinsey & CompanyConsultant2018Berlin, Germany

Education

  1. University of CambridgeDoctor of Philosophy - PhD, Theoretical & Computational Cosmology
  2. ETH ZürichBSc & MSc, Theoretical and Mathematical Physics
  3. Stanford UniversityResearch Scholar, Stanford Institute for Theoretical Physics (SITP)

Same school

Also attended University of Cambridge652

Niko BonatsosInvestment Team at General CatalystGeorgia StevensonInvestor at Index VenturesHannah SealInvestor at Index VenturesAnthony PhilippakisInvestor at GV (Google Ventures)Erik NordlanderInvestor at GV (Google Ventures)Nic LowdenInvestor at Moonfire Ventures

+ 646 more

Also attended ETH Zürich136

Bastian HasslingerInvestor at Index VenturesSteve VassalloInvestor at Foundation CapitalHelge DaebelPartner, Head of Water at Emerald Technology Ventures AgMaurin DaiInvestment Manager, Physical AI & Robotics at Emerald Technology Ventures AgChristoph FreiPartner, Head of Energy at Emerald Technology Ventures AgMax HeftiInvestment Director - Energy at Emerald Technology Ventures Ag

+ 130 more

Also attended Stanford University1,726

Peter ThielCo-founder & Partner at Founders FundReid HoffmanCo-founder of LinkedIn; Partner at GreylockDavid SacksCo-founder & General Partner at Craft Ventures; former White House AI & Crypto CzarKeith RaboisManaging Director at Khosla VenturesGarry TanPresident & CEO of Y CombinatorAlfred LinPartner at Sequoia Capital

+ 1,720 more

Shared employers

Also worked at Massachusetts Institute of Technology325

Aileen LeeFounder & Managing Partner of Cowboy VenturesMatt HuangCo-founder and Managing Partner at ParadigmScott BillerInvestor at GV (Google Ventures)Noubar AfeyanInvestor at Flagship PioneeringVyas RamananVenture Partner at Third Rock VenturesRhie LimPartner, Global Strategy at One Way Ventures

+ 319 more

Also worked at sizeless1

Cornelius von EinemFounder at sizeless

Also worked at University of California, Berkeley184

Paul JennyBoard Chair at CincyTechAndrea van ElsasInvestor at Third Rock VenturesFreada Kapor KleinFounding Partner at Kapor CapitalUlili OnovakpuriManaging Partner at Kapor CapitalRoseanneCo-founder at Renegade PartnersJay ParrishVenture Partner at ARCH Venture Partners

+ 178 more

Also worked at Berkeley Lab38

Jessy RivestInvestor at Khosla VenturesJan CrisostomoOperating Partner at Rackhouse Venture Management LpAvinash KantInvestor at Phoenix Venture PartnersDaphne ChePrincipal at Electric Feel Ventures LlcLan WuAnalyst at FusionKylie TrettnerInvestment & Research Analyst at Undeterred Capital

+ 32 more