Mechanical Test Engineer III - Advanced Manufacturing
Hawthorne, California, United States · On-site
$100k–$150k/yr
Senior$73M raised
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Skills: GSE Design, Vacuum System Operation, Environmental Testing, Test Procedure Writing, Data Acquisition
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$100k–$150k/yr
Full-time
bachelor degree
Equity, Comprehensive Benefits
Posted 34d ago
~40 hrs/week
Responsibilities
Design and develop ground support equipment and test infrastructure for electric propulsion systems. Execute end-to-end test campaigns including integration, operation, and troubleshooting within vacuum chamber environments.
Requirements
Requires a BS in Mechanical or Aerospace Engineering with 3-7 years of hands-on integration and environmental testing experience. Must be proficient in writing test procedures and operating vacuum systems, and meet U.S. export control requirements.
Full job description
Who We're Looking For
Quantum Space is redefining mobility and autonomy beyond Earth orbit. Our Ranger spacecraft deliver high delta-V and sustained on-orbit maneuverability, enabling missions across cislunar and geostationary space that were previously out of reach. We are building the vehicles, infrastructure, and operational expertise that connect and protect assets across the Earth–Moon system.
Quantum Space is seeking a GSE Test Engineer II to support the development and validation of electric propulsion (EP) technologies. This role is a strong fit for an engineer coming from a flight hardware integration and test background — someone who has written procedures, run environmental test campaigns, and worked hands-on with complex systems in controlled environments. You'll bring that discipline and rigor to building and operating our in-house EP test capability.
Where You'll Make an Impact
Design and develop GSE and test infrastructure for electric propulsion systems, including thrusters, feed systems, and support equipment
Set up, configure, and operate vacuum chamber test environments for EP testing
Write and own test procedures, safety documentation, and operational workflows
Execute EP test campaigns end-to-end: integration, operation, data collection, and troubleshooting
Operate and maintain vacuum systems including turbo, cryo, and roughing pumps, valves, and gauges
Troubleshoot vacuum performance issues including leaks, contamination, and system instability
Support instrumentation and data acquisition system implementation
Contribute to test system requirements covering vacuum performance, thermal constraints, and instrumentation
Work cross-functionally with propulsion, mechanical, electrical, and AI&T teams to support test readiness
What It Takes
BS in Mechanical Engineering, Aerospace Engineering, or a related technical field
3-7 years of hands-on integration and test experience, including environmental testing (thermal vacuum, vibration, EMI/EMC, or similar)
Experience writing and executing test procedures for complex hardware
Familiarity with vacuum systems or thermal vacuum chamber operations
Ability to interface across engineering disciplines — mechanical, electrical, thermal — in a test environment
Comfortable working hands-on with flight-grade or high-precision hardware
Strong attention to process, documentation, and operational safety
Located in or willing to relocate to the LA area
Nice-to-Have Experience
Any exposure to electric propulsion systems or concepts
Experience with GSE design or fabrication
Familiarity with LabVIEW, PLCs, or data acquisition systems
Exposure to gas delivery or high-voltage systems
Contamination control and cleanroom experience
What You'll Get
Hands-On Ownership – Real responsibility on live test hardware from day one
Impact – Direct contribution to core spacecraft propulsion technology
Growth – Expand from instrument I&T into propulsion systems and space vehicle test infrastructure
Compensation – Competitive salary, equity, and comprehensive benefits
Location: Hawthorne, CA
Base Salary: $100,000 to $150,000 depending on experience
Additional Requirements
To comply with U.S. Government space technology export regulations, including ITAR, applicants must be a U.S. citizen, lawful permanent resident, protected individual per 8 U.S.C. 1324b(a)(3), or eligible to obtain required authorizations.
Delivering the Freedom to Maneuver in space—building a fleet of maneuver-first spacecraft to ensure space superiority
Industry
Defense and Space Manufacturing
Company size
51-200 employees
Headquarters
Rockville, Maryland
LinkedIn followers
18,437
Total funding
$73M
Quantum Space is developing Ranger—a maneuver-first, mission-configurable spacecraft designed to support and meet the demands of modern space operations. With patented propulsion, extended on-orbit endurance, and modular flexibility, Ranger is being built to outmaneuver legacy satellites and operate dynamically across mission sets. From deploying interceptors to refueling allied assets, Ranger enables persistent presence, rapid repositioning, and longer mission life—across any orbit. The result is a dramatic increase in survivability, responsiveness, and ROI for both national security and commercial customers.
Offices: 801 Thompson Ave, Rockville, Maryland 20852, US
Delivering the Freedom to Maneuver in space—building a fleet of maneuver-first spacecraft to ensure space superiority
Industry
Defense and Space Manufacturing
Company size
51-200 employees
Headquarters
Rockville, Maryland
LinkedIn followers
18,437
Total funding
$73M
Quantum Space is developing Ranger—a maneuver-first, mission-configurable spacecraft designed to support and meet the demands of modern space operations. With patented propulsion, extended on-orbit endurance, and modular flexibility, Ranger is being built to outmaneuver legacy satellites and operate dynamically across mission sets. From deploying interceptors to refueling allied assets, Ranger enables persistent presence, rapid repositioning, and longer mission life—across any orbit. The result is a dramatic increase in survivability, responsiveness, and ROI for both national security and commercial customers.
Offices: 801 Thompson Ave, Rockville, Maryland 20852, US