Castelion is a defence-technology company that designs, tests and manufactures next-generation hypersonic and long-range strike weapons. Founded by former SpaceX engineers, the firm applies modern hardware-development and rapid-iteration methods to what it views as urgent national-security challenges. Its approach pairs vertical integration with a focus on manufacturability from the outset, aiming to produce systems that are both affordable and high-performance.
The company has compressed its design-to-launch cycle time from years to months. In a single year it conducted over 20 flight tests. Production is centred on a 1,000-acre campus in New Mexico. Castelion raised $350 million in a Series B funding round.
The company describes its culture as defined by urgency, purpose and a bias for action. Engineers and operators work alongside each other with minimal bureaucracy, and staff are given ownership of critical projects from concept through flight test.
