Principal Mechanical Engineer - Advanced Programs

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.

• 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

• 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

• 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

• 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

Hawthorne, CA

$145,000 to $195,000

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.