Mechanical Engineer III

Responsibilities

• Own mechanical design of electric propulsion subsystems including thruster assemblies, structural interfaces, feed systems, and thermal management hardware
• Lead architecture and packaging trades for propulsion integration
• Develop and release high-quality CAD models and drawings with full GD&T
• Perform and guide structural and thermal analysis for high-temperature and vacuum environments
• Drive integration and testing of propulsion systems, including anomaly resolution and root cause analysis
• Define and execute verification strategies through analysis, inspection, and test
• Lead design reviews (PDR/CDR) and communicate technical decisions
• Coordinate with suppliers and manufacturing partners for precision components
• Mentor junior engineers and elevate team technical capability

Requirements

• BS or MS in Mechanical Engineering or related field
• 5–10+ years of experience developing hardware, preferably in high-performance aerospace systems
• Strong proficiency in Creo or similar CAD software
• Deep understanding of GD&T (ASME Y14.5)
• Experience owning hardware through full lifecycle from design to flight
• Strong background in structural and thermal analysis
• Proven ability to lead technical efforts and drive decisions
• Strong troubleshooting and root cause analysis capability
• Ability to work on-site in the LA area
• Must be a U.S. citizen, lawful permanent resident, or protected individual per ITAR regulations

Preferred Qualifications

• Direct experience with electric propulsion systems
• Familiarity with plasma environments and material selection for EP systems
• Experience with thermal management in high-power-density systems
• Proficiency with FEA tools such as ANSYS or Nastran
• Experience with environmental testing including TVAC, vibration, and life testing
• Familiarity with PLM systems like Windchill

About the Company

Quantum Space is redefining mobility and autonomy beyond Earth orbit. Their Ranger spacecraft deliver high delta-V and sustained on-orbit maneuverability, enabling missions across cislunar and geostationary space.