About this opportunity
STEM Boomerang lists this Senior Warhead Design Engineer opportunity in rio rancho, New Mexico. Review the employer’s description below for duties, qualifications and application requirements.
Job description
Rio Rancho, United States | Posted on 08/06/2026
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.
About the Role
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
Basic Qualifications
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.
Preferred Skills and Experience
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.
Employee Equity: Meaningful equity forall full-time employees - share value has increased 150x in three years
Personal Time Off: Four (4) weeks of paidtime off to unplug, reset, and come back sharp—velocity matters,burnout doesn't
Medical: We offer plans at 100% employeecovered and 80% of dependent coverage
Dental & Vision: We cover 90%employees and 80% for dependents to ensure you and your family haveaccess to quality preventive and ongoing care
FSA/HSA: To support long-term health andfinancial resilience, we offer FSA and HSA options that allowemployees to set aside pre-tax dollars for eligible medical anddependent care expenses
Retirement: 401k plan offered to supportlong term financial growth along side high-impact, high-velocity work
Paid Parental Leave: We support growingfamilies with meaningful time to bond and recover. Birthing parentsare eligible for up to 10 weeks of paid leave, while non-birthingparents may take up to 4 weeks of paid leave. This time can be usedfor pre-natal care, pregnancy, childbirth, and related medicalneeds—ensuring every parent has the support they need during thisimportant life moment.8-weeks of paid parental leave for allparents. Additional paid pregnancy leave for CA employees
Meals & Catering: Frequently cateredlunches and team meals, plus company-covered meals when extra timeor effort is required
Snacks & Beverages: Fully stockedkitchen with unlimited snacks and drinks to keep you fueledthroughout the day
Performance & Fitness: $100 monthlyfitness stipend to support peak performance and health, both insideand outside of work
EV Charging: Onsite electric vehiclecharging available for employees
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Worksite address
rio rancho, NM, 87144, US
Who can apply
Review the original listing for work authorization, qualifications and employer requirements.