OCTOBER 5, 2025 Two more development flights completed Sunday. Every test is part of a deliberate cycle that drives everything we do at Castelion. These missions validate vertically integrated subsystems and components from a growing network of non-traditional suppliers nationwide. It’s not just about putting vehicles in the air; it’s about tightening the link between engineering and manufacturing so we can deliver capability at the speed deterrence demands.
About us
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.
- Website
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https://castelion.com
External link for Castelion
- Industry
- Defense and Space Manufacturing
- Company size
- 51-200 employees
- Headquarters
- Torrance, CA
- Type
- Privately Held
- Founded
- 2022
- Specialties
- National Security, Defense, Military, Manufacturing, Government, Aerospace, and Industrial Automation
Locations
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Primary
Get directions
Torrance, CA, US
Employees at Castelion
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Kirsten Bartok Touw
Defense Tech, Space & National Security early stage venture investor / 2x founder / ex DoD OSC / Stanford GSB / Ex Goldman & JPM
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Jeff Crusey
Deep Tech Investor + Company Builder // EVP @ Blacklake // Co-founder @ Per Aspera
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Katherine Boyle
General Partner at Andreessen Horowitz, American Dynamism 🇺🇸
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Marcie Steerman
Proposal Development | Business Communications | Capture Management
Updates
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Castelion welcomes Alex Roesler to the team, who joins us from Sandia National Laboratories. As Deputy Director for Sandia’s Integrated Military Systems Center, Alex oversaw hypersonic vehicle design, development, qualification, and flight testing. He also led Sandia’s role as Design Agent for the Navy’s Conventional Prompt Strike and Army’s Long Range Hypersonic Weapon programs, guiding the Common Hypersonic Glide Body from development through transition to production. With Alex on the team, our push to deliver affordable long-range strike moves forward.
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This summer brought Castelion to locations both near and far, battling high temperatures and inhospitable environments as we continued to push our development and test campaigns forward. Shoulder to shoulder, our team embraces the long days knowing this kind of Type 2 fun is what it takes to deliver the capabilities America needs.
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The need for hypersonic deterrence is real. We're scaling to meet that need. Join us. https://lnkd.in/gVrtgiCH
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Castelion Welcomes Retired U.S. Navy Captain Greg Zettler to the Team As Program Manager for the Navy’s Conventional Prompt Strike program, Greg led one of DoD’s most urgent efforts, taking it from early development through successful Army and Navy flight tests. Now, he’s joining Castelion to help deliver affordable, high-volume long-range strike capabilities that strengthen the nation’s prompt strike toolkit. Welcome aboard, Greg. The mission continues. Read why he chose Castelion here: https://lnkd.in/d_WkwSsz
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Last week we paused the hustle for just a moment to celebrate the Castelion team and their families with a summer carnival. From dunk tanks and lawn games to tacos and snow cones, it was a chance to kick back, connect, and enjoy the crew that’s building something truly special. Grateful for this team and everything we’re building together. More missiles, fewer meetings. And the occasional ring toss.
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