Senior Warhead Design Engineer

STEM Boomerang • Rio Rancho, NM

6d

About The Position

Castelion was founded to restore America’s ability to field advanced weapons at speed and scale. Inspired by the engineering urgency of the WWII and Apollo eras, we combine rapid iteration, vertical integration, and scalable manufacturing to deliver affordable, high-performance strike systems. Our mission: rebuild industrial agility to strengthen national security and outpace evolving threats.

Castelion is designing and building next-generation hypersonic weapon systems that restore stability through credible deterrence. We are seeking a hands-on, mission-driven Senior Warhead Design Engineer to lead the design, development, and integration of advanced next-generation systems for our long-range hypersonic strike vehicles.

This is a high-impact role for someone with deep expertise in energetic devices and safe & arm mechanisms, who thrives in a fast-paced, hardware-rich development environment.

Requirements

• B.S. or M.S. in Mechanical Engineering, Aerospace Engineering, or related field.
• 5+ years of experience in ordnance or energetics design, analysis, and test
• Familiarity with relevant DoD and NASA standards (e.g., MIL-STD-1316, MIL-STD-1901A, etc.).
• Hands-on test experience in high-consequence environments.
• Strong communication and documentation skills.
• Active or eligible for a U.S. security clearance.

Nice To Haves

• Experience working with DoD customers and navigating military qualification processes.
• Background in hypersonics, missile systems, or space launch vehicles.
• CAD and mechanical analysis experience (e.g., SolidWorks, FEA tools).
• Experience with additive manufacturing tools and capabilities.
• Prior experience working at a defense startup or fast-moving development organization.

Responsibilities

• Lead the design, development, and integration of advanced next-generation systems for long-range hypersonic strike vehicles.
• Design, development, and integration of advanced next-generation systems.

Benefits

• Meaningful equity for all full-time employees
• Four (4) weeks of paid time off
• Ten (10) company paid holidays
• Plans at 100% employee covered and 80% of dependent coverage for Medical
• Cover 90% employees and 80% for dependents for Dental & Vision
• FSA and HSA options
• 401k plan
• Up to 10 weeks of paid leave for birthing parents
• Up to 4 weeks of paid leave for non-birthing parents
• 8-weeks of paid parental leave for all parents
• Frequently catered lunches and team meals
• Company-covered meals when extra time or effort is required
• Fully stocked kitchen with unlimited snacks and drinks
• $100 monthly fitness stipend
• Onsite electric vehicle charging

What This Job Offers

• Job Type: Full-time
• Career Level: Senior