Castelion is a private American defense-tech startup founded in 2022 by former SpaceX engineers and defense industry specialists (with Bryon Hargis serving as CEO and co-founder). Headquartered in California (El Segundo / Torrance), the company’s primary goal is the development, testing, and mass production of next-generation modern hypersonic missile systems at a significantly lower cost and in much shorter timeframes than traditional defense-industrial complex contractors.
