Senior Propulsion Engineer (Rocket Motors)

STEM Boomerang • Rio Rancho, NM

5d

About The Position

We are seeking a Senior Propulsion Engineer to design, build, and test rocket motor systems for Castelion's long-range hypersonic strike vehicles. This role is critical to delivering reliable, high-performance propulsion across all mission phases. You will work hands-on with multidisciplinary engineering teams to develop solid rocket motors and associated hardware from concept through flight test in a fast-paced, hardware-driven environment.

Requirements

• Bachelor's, Master's, or PhD in Aerospace Engineering, Mechanical Engineering, or related field
• 5+ years of experience in rocket propulsion design, analysis, and testing for aerospace or defense applications
• Strong background in solid rocket motor design, including internal ballistics, grain design, and nozzle performance
• Experience with propulsion testing, including static fire test setup, instrumentation, and data analysis
• Familiarity with structural and thermal design considerations for high-temperature, high-pressure systems
• Proficiency in analysis and modeling tools (e.g., MATLAB, ANSYS, or equivalent)
• Experience with hardware build, integration, and troubleshooting in a lab or test environment
• Strong problem-solving mindset, thriving in a fast-paced, hardware-rich, high test cadence environment

Responsibilities

• Design, build, and test rocket motor systems
• Develop solid rocket motors and associated hardware from concept through flight test
• Work hands-on with multidisciplinary engineering teams
• Conduct internal ballistics, grain design, and nozzle performance analysis
• Set up, instrument, and analyze data from propulsion tests, including static fire tests
• Consider structural and thermal design for high-temperature, high-pressure systems
• Build, integrate, and troubleshoot hardware in a lab or test environment

Benefits

• Meaningful equity for all full-time employees
• Four (4) weeks of paid time off
• Ten (10) company paid holidays
• Medical plans with 100% employee covered and 80% of dependent coverage
• Dental & Vision coverage with 90% for employees and 80% for dependents
• FSA/HSA options
• 401k plan
• Paid Parental Leave (up to 10 weeks for birthing parents, up to 4 weeks for non-birthing parents, 8 weeks 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