• Jobs
  • Startups
  • Hire
LoginSign up

Castelion

Organization banner, image 1 of 2
Organization banner, image 2 of 2

Castelion has 373 open roles, 74 posted in the last 30 days. Last round: Series C, $800M, Aug 19, 2026.

Open roles

  • Castelion logo
    Flight Termination Systems Engineer

    Castelion

    • Torrance, CA
    Greenhouse
    Posted 1d ago
  • Castelion logo
    Senior Propulsion Engineer (Rocket Motor Nozzles)

    Castelion

    • Torrance, CA
    • Senior
    Greenhouse
    Posted 1d ago
  • Castelion logo
    Propulsion Engineer (Solid Rocket Motor Ballistics)

    Castelion

    • Torrance, CA
    • Junior
    Greenhouse
    Posted 1d ago
  • Castelion logo
    Purchasing Coordinator

    Castelion

    • Torrance, CA
    • Junior
    Greenhouse
    Posted 1d ago
  • Castelion logo
    Senior Flight Harness Design Engineer

    Castelion

    • Torrance, CA
    • Senior
    Greenhouse
    Posted 2d ago
  • Castelion logo
    Propulsion Engineering Intern (Summer 2027)

    Castelion

    • Torrance, CA
    • Intern
    Greenhouse
    Posted 2d ago
Show all roles

About

Castelion logo

Castelion

Modern Defense Production

Castelion is bringing a new approach to defense development and production: one that focuses on short, iterative design cycles, rapid testing in development, and modern commercial manufacturing strategies for production at scale. We’re designing, building, and testing next generation long range strike weapons systems to give America and its Allies a definitive edge and deter future conflicts.

Private companyMega roundIn the news
Founded2022
HQTorrance, United States
Size201-500 employees
Unlock human wisdom
ThesisTermsPrivacy
Industry
Defense and Space Manufacturing
Funding
  • Series C · $800M · Aug 19, 2026
  • Series A · $70M · Jan 29, 2025
Investors
Lightspeed Venture PartnersAndreessen HorowitzJPMorgan ChaseCarlyle Group
Tech stacksentinelone, power-bi, snort, microsoft-exchange, matlab, influxdb, tableau, electron, slack, microsoft-powerpoint
News
  • Saronic and Castelion to Demonstrate First-of-Its-Kind Maritime Hypersonic Launch Capability

Claim castelion.com

Work at castelion.com? Sign in to claim this org and manage its profile.

© 2026 Saywise Inc.