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Cyriel Notteboom

Founder

Founder at Radical

Seattle, Washington, United States

FoundedRadical · YC

Find your path to Cyriel

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

Simon WoutersunlockedCyriel: together at KU Leuven (2015)
×4Cyriel: together at KU Leuven
×7Cyriel: together at Y Combinator

About

Cyriel Notteboom is CTO at Radical, a company developing high-altitude solar-powered aircraft. He previously spent six years at Amazon Prime Air working on mechanical design and structural analysis for delivery drones.

Founder at RadicalYC W23

Intro paths

YC

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

GP

Their group partner at YC was Jared Friedman, YC Group Partner — the partner who ran Radical's batch and knows the company first-hand. YC profile ↗

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In turn, Cyriel can intro founders to Radical's investors below.

Radical's investors · 8

Bessemer Venture PartnersRedwood City · $5M – $100M checks · since 2026BoxGroupNew York · $1M checks · since 2026ConvictionSan Francisco · $1M – $25M checks · since 2026Inflection.xyzBoston · $500K – $2M checksRadical VenturesToronto · $1M – $25M checks · since 2026Scout VenturesAustin · $2M – $5M checksScout VenturesAustin · $2M – $5M checksY CombinatorSan Francisco · $500K checks · since 2023

Co-founders at Radical

JTJames Thomas
James ThomasFounder

Experience

  1. RadicalCo-Founder & CTOcurrent2022 — presentSeattle, Washington, United States
  2. AmazonSenior Hardware Development Engineer2020 — 2022Seattle, Washington, United States
  3. AmazonHardware Development Engineer II2017 — 2020Seattle, Washington, United States
  4. AmazonHardware Development Engineer I2016 — 2017Cambridge, England, United Kingdom
  5. AmazonHardware Development Engineer2015Cambridge, England, United Kingdom
  6. KU LeuvenResearch Scientist2014Leuven, Flemish Region, Belgium

Skills & more

Drone Piloting1Aerospace Structures1Finite Element Analysis (FEA)1Computer-Aided Design (CAD)1Laser Cutting13D Printing1Ansys Mechanical1FEMAP1Mechanical Engineering10Aerospace Engineering9Product Design6Project Management4
+8 moreSOLIDWORKSCATIAJulia (Programming Language)Python (Programming Language)Multi-Disciplinary OptimizationMatlabSolid EdgeSimulink

Languages Dutch · English · French · German

  • Part 107 Remote Pilot Certificate — Federal Aviation Administration
  • Level 1 Avalanche Certification — American Avalanche Institute

From Cyriel's professional profile.

Frequently asked questions

Who is Cyriel Notteboom?
Cyriel Notteboom is CTO at Radical, a company developing high-altitude solar-powered aircraft. He previously spent six years at Amazon Prime Air working on mechanical design and structural analysis for delivery drones.
Where does Cyriel Notteboom work?
Cyriel Notteboom is Founder of Radical.
What companies did Cyriel Notteboom found?
Cyriel Notteboom founded Radical.
Where did Cyriel Notteboom go to school?
Cyriel Notteboom studied at Y Combinator (W23); KU Leuven (Master after Master, Management); KU Leuven (Master of Science - MS, Mechanical & Aerospace Engineering).

Founder mafias

Same school

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