Cyriel Notteboom

Cyriel Notteboom

Co-Founder & CTO at Radical
United States

Cyriel Notteboom is Co-Founder and CTO at Radical, where he leads development of high-altitude solar-powered aircraft. He has expertise in hardware development engineering, aerospace structures, mechanical design, mechanisms, and multi-disciplinary aircraft optimization.

Recent coverage

Front-page news, podcasts and videos about Cyriel

Alan Boyle / GeekWire

Former Amazon Prime Air Founders Raise $4.5M for Radical’s Solar-Powered Autonomous Aircraft Startup

Seattle-based startup Radical, founded by ex-Amazon Prime Air employees James Thomas and Cyriel Notteboom, raised $4.5 million to develop autonomous solar-powered aircraft for long-duration stratospheric flights to provide connectivity and imaging services. They recently demonstrated a prototype that flew nonstop for over 24 hours and plan to expand their team and capabilities.

Organizations

See all 4
  • Radical Ventures logo
    Radical Ventures Executive Officer, Director, Promoter 2024–present · current
  • Radical Co-Founder & CTO 2022–present, Chief Technology Officer · current
  • Amazon Senior Hardware Development Engineer 2020–2022, Hardware Development Engineer II 2017–2020, Hardware Development Engineer I 2016–2017, Hardware Development Engineer 2015 · past

Education

  • Creative Destruction Lab Space Stream · 2024–2025
  • Y Combinator W23 · 2023
  • KU Leuven Master after Master, Management · 2014–2015
  • KU Leuven Master of Science - MS, Mechanical & Aerospace Engineering · 2013–2014
  • Technical University of Munich Master of Science - MS, Mechanical & Aerospace Engineering · 2012–2013
  • KU Leuven Bachelor of Science - BS, Mechanical & Electrical Engineering · 2009–2012

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