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Principal Mechanical Engineer - Advanced Programs

Hawthorne, CA

Who We’re Looking For

Quantum Space is seeking a Principal Mechanical Engineer for Advanced Programs to drive mechanical architectures for next-generation spacecraft concepts—where requirements are evolving, the trade space is wide, and rigorous engineering judgment matters.

This is a principal-level role: you will own ambiguous problems, set technical direction, and lead cross-functional execution toward buildable designs. 

Where You’ll Make an Impact

  • Lead mechanical architecture and trade studies: packaging, mechanism concepts, structural layout, thermal hardware accommodation, serviceability, and integration strategy
  • Own subsystem/interface definitions and drive closure with systems engineering: ICD inputs, keep-outs, access constraints, mass properties, alignment and stability needs
  • Drive mechanical design maturation from concept to preliminary/detailed design: requirements, sizing logic, margins and assumptions, verification strategy
  • Lead risk identification and mitigation planning (materials, joints, mechanisms, contamination, alignment, thermal distortion, integration sequence)
  • Support prototype builds and rapid iteration: design-to-test loops, test learning incorporation, design updates
  • Partner with procurement and suppliers: SOW technical inputs, technical evaluation, vendor coordination, design for manufacturability feedback loops
  • Deliver review-quality content: architecture rationale, risk posture, verification approach, and build/test readiness
  • Provide technical guidance and direct mentoring to develop engineering talent and foster growth within the team

What It Takes

  • BS or MS in Mechanical Engineering or related field
  • 10+ years mechanical engineering experience, with sustained ownership of complex hardware development 
  • Broad mechanical systems knowledge (structures, mechanisms, materials, thermal management, packaging, integration realities)
  • Strong communication and leadership without relying on org-chart authority
  • Comfort operating in ambiguity and driving crisp decisions with incomplete data
  • Work location within the LA area

Nice-to-Have Experience

  • Fielded space hardware (design principles, relevant standards, full product lifecycle)
  • Spacecraft mechanism design (release devices, deployment, latching, pointing structures)
  • Fluids expertise and design experience
  • Experience supporting environmental testing and verification closure
  • Creo/Windchill experience and ability to guide design quality standards

What You’ll Get

  • Ownership – Be a technical anchor in Advanced Programs
  • Innovation – Turn early concepts into executable hardware roadmaps
  • Impact – Shape the next spacecraft generation
  • Compensation – Competitive salary, equity, and comprehensive benefits, including medical, dental, vision, generous leave, HSA, 401(k) matching, and equity participation.

Location: Hawthorne, CA

Compensation: $145,000 to $195,000

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 the required authorizations from the U.S. Department of State.

Apply now. Help define the mechanical future of Quantum Space.

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