Hardware Designed for Production at Scale
Castelion delivers the capabilities America needs to preserve peace through credible, non-nuclear deterrence. We build at the scale national security demands – optimizing every system for cost, manufacturability, and rapid deployment.
Hardware Rich.
Rapid Test and Iteration.
Designed for Scaled Manufacturing.
Affordable Hypersonic Weapons, Built Fast
At Castelion, speed and cost aren’t tradeoffs – they’re requirements. We vertically integrate core technologies to move faster, reduce risk, and control cost at scale. Every system is designed for manufacturability from day one, enabling rapid iteration and high-volume production. In today’s threat environment, speed matters. Affordability matters. We’re building with both.
Protecting Democracy
Our mission is rooted in the belief that freedom must be actively protected – through technological strength, strategic clarity, and national resolve. By restoring America’s ability to out-innovate and out-produce its rivals, we help ensure that the free world remains secure for generations to come.
Hardware Rich
Rapid Testing
Iterative Design
America Needs You!
Ready to get your hands on real hardware, own critical projects, and make your work count? Explore our open roles and help shape the future of defense.
Featured Positions
Choose your next adventure with Castelion.
Protecting Yourself from Recruitment Scams
Castelion will never contact candidates from Gmail or other personal email accounts, all official communication will come from the @castelion.com domain, and candidates should verify they are speaking with a real Castelion representative.
Castelion News
U.S. Navy Awards Castelion $90M to Advance Blackbeard to Early Operational Capability
Castelion has been awarded an $89,997,162 firm-fixed-price order from the U.S. Navy to advance Blackbeard hypersonic strike weapon to Early Operational Capability (EOC). The award is building on Castelion’s prior work regarding “Low Cost Highly Manufacturable Long Range Strike Weapon Production.”
U.S. Navy Awards Castelion First Delivery Order for Blackbeard Hypersonic Weapon
Castelion has been awarded a $23.4M firm-fixed-price order from the U.S. Navy for the production and delivery of 50 Blackbeard early operational capability pre-production prototypes and 50 associated storage and shipping containers. Award marks first delivery of low-cost hypersonic strike weapons to the Navy
Saronic and Castelion to Demonstrate First-of-Its-Kind Maritime Hypersonic Launch Capability
The collaboration between Castelion and Saronic marks the first integration of autonomous surface vessels with hypersonics, and stands to accelerate distributed hypersonic capabilities by pairing Saronic’s autonomous surface vessels (ASVs) with Castelion’s low-cost hypersonics. The companies, both founded in late-2022, are targeting a demonstration in 2027.