Global stability requires strong Democracies Castelion exists to build the systems America and its partners need to keep a global technical edge. We design, test, and manufacture next-generation military systems rapidly and at massive scale to deter future wars.

leadership at castelion A 20-year veteran of the Aerospace and Defense Industry, Bryon most recently led sales, business development and early product definition for SpaceX’s National Security satellite programs – building a multi-billion-dollar sales pipeline in under 5 years.

We are seeking qualified candidates to fill these positions at Castelion. HOME TEAM NEWS Careers Contact. Careers AT Castelion. LEARN MORE. Careers Available AT CASTELION. Senior Radar Analyst. Allen, TX. FULL-TIME. PART-TIME. CONTRACTOR. Senior Mechanical Engineer. Allen, TX. FULL-TIME. PART-TIME. CONTRACTOR. Senior FPGA Engineer.

About Castelion. 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.

At Castelion, you’ll be part of a team committed to shaping the future of defense technology. Our co-op students contribute directly to critical projects and gain real-world experience in a fast-growing company.

Translate project objectives into cost-effective designs that can be produced at scale – the Castelion way. Spearhead the creation of innovative solid rocket motor designs, demonstrating autonomy even with limited expert guidance.

Position Overview: Castelion is seeking motivated and talented engineering interns for Summer 2025. This internship offers a dynamic, hands-on experience working on cutting-edge missile systems, including SW, guidance, navigation and control (GNC), propulsion, power electronics, manufacturing, mechanical/structures, avionics, system integration ...

Castelion is focused on the rapid development and mass manufacturing of complex defense systems, with an emphasis on schedule, affordability, and scale – the critical components of maintaining the military advantage needed for a lasting and enduring peace.

We are seeking a highly motivated and experienced Human Resources professional to serve as Castelion’s first HR hire. You will be a critical partner in building our company culture, supporting both hourly and salaried employees, and handling all …

Interested in Castelion but not sure which job to apply for? Drop your resume here and we can help you figure it out. All employees are granted long-term stock incentives as part of their employment as Castelion.