Senior Integration & Test Engineer

We are looking for a Senior Integration & Test Engineer with 5+ years of experience to own the end-to-end integration and verification of hypersonic strike vehicles as Castelion prepares to deliver its first 50 Blackbeard units to the U.S. Navy. This is an incredibly cross-functional engineering role — you'll be embedded in the build process from day one, ensuring every subsystem is properly validated before handoff to the customer. You need to be someone with deep systems-level understanding, strong foresight to anticipate integration issues before they arise, and the ability to work across mechanical, electrical, and software domains. The ideal candidate comes from a high-complexity, high-stakes environment — think first-build programs, pilot builds, or new product development where engineering standards are non-negotiable. You'll also mentor a junior integration engineer and help build out the I&T function as Castelion scales production.

What will you be doing?

• Leading vehicle-level integration activities — ensuring form, fit, and function across all subsystems (warheads, propulsion, avionics, structures) as units move through production
• Developing and executing integration & test strategies that catch issues during the build process, not after — acting as the quality gatekeeper before customer delivery
• Writing and running test automation scripts (Python, LabVIEW) for environmental testing including vibration, thermal, and vacuum chamber validation
• Designing integration tooling and fixtures for safe handling and assembly of energetic and complex mechanical systems
• Mentoring a junior integration & test engineer and building out the I&T team to support production scale-up across Torrance and Rio Rancho facilities