Castelion
Senior Mechanical Design Engineer
Torrance, CA +1 · Senior · Full-time · Posted Sep 14, 2026
- Location
- Torrance, CA
19951 Mariner Ave, Torance, CA 90503 - Experience
- 5+ years of professional mechanical engineering experience.
- Education
- Bachelor’s degree in Mechanical Engineering.
- Visa sponsorship
- The position requires access to export-controlled information; employment is contingent on being able to access applicable information without additional export licensing. If designated, the role may also require obtaining and maintaining a U.S. Government security clearance or other authorization and meeting applicable citizenship or eligibility requirements.
About the job
Designs, builds, and integrates flight structures and mechanisms for hypersonic vehicles, owning hardware from concept through flight.
What you'll do
- Lead design, build, and integration of flight components such as composite tanks, separation mechanisms, actuators, and control surfaces; verify designs through analysis, testing, and flight.
- Support four-week prototyping cycles, collaborate in design reviews, and iterate hardware based on test feedback.
- Develop engineering practices and build documentation, and work with technicians on integration and assembly.
What they ask for
- Bachelor’s degree in Mechanical Engineering.
- 5+ years of professional mechanical engineering experience.
- Experience with complex CAD design, tolerance stack-up, thermal and structural analysis, and design-to-cost.
- Experience designing manufacturable, weight- and cost-optimized hardware and owning designs from concept through implementation, production, and operations.
Nice to have
- Experience with coatings, finishes, and composite structures.
- Creative problem-solving, initiative, and strong stakeholder communication.
Tools
CAD
Model-written summary · the original posting is authoritative