Senior Mechanical Design Engineer (ACS Systems)

Castelion Corporation
Rio Rancho, NM
Category Engineering
Job Description
We are seeking a Senior Mechanical Design Engineer to design and deliver attitude control system (ACS) hardware for Castelion's long-range hypersonic strike vehicles. This role is critical to enabling reliable propellant storage, flow control, and thrust generation for precise vehicle control.

Requirements

  • Design and develop ACS hardware, including propellant tanks, valves, thrusters, and associated fluid system assemblies
  • Lead the architecture and detailed design of pressure vessels, fluid lines, mounts, and integrated ACS packaging within the vehicle
  • Perform structural, thermal, and fluid analyses to ensure performance and reliability under extreme pressure, temperature, and dynamic environments
  • Work closely with propulsion, GNC, avionics, and structures teams to ensure seamless integration of ACS systems with vehicle architecture
  • Conduct tolerance analysis, sealing strategy development, and leak-tightness assessments for high-pressure systems
  • Support prototyping, assembly, and hardware bring-up, including troubleshooting and root cause analysis of system performance issues
  • Define and execute qualification and environmental test plans, including pressure, vibration, thermal, and shock testing
  • Optimize designs for mass, reliability, manufacturability, and ease of integration
  • Mentor junior engineers and contribute to best practices in mechanical and fluid system design
  • Partner closely with program leadership to make technical trades aligned with mission success

Benefits

  • Four (4) weeks of paid time off
  • Ten (10) company-paid holidays
  • Comprehensive health benefits
  • Paid parental leave
  • $100 monthly fitness stipend
  • Onsite EV charging
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