Senior Hardware Development Engineer

At Vast, our mission is to contribute to a future where billions of people are living and thriving in space. We are building artificial gravity space stations, allowing long-term stays in space without the adverse effects of zero-gravity. Our initial crewed space habitat will be Haven-1, scheduled to be the world’s first commercial space station when it launches into low-Earth orbit in 2026.

It is part of our stepping stone approach to continuous human presence in LEO. Our team is all-in, committed to executing our mission safely and on time. If you want to work with the most talented people on Earth furthering space exploration for humanity, come join us.

Vast is looking for a Mechanical Engineer
, reporting to the Manager, Structures Design
, to support the development of the systems that will be required for the design and build of artificial-gravity human-rated space stations. This role blends mechanical and systems engineering with human-factors-driven product development to shape the environments where astronauts will live and work aboard our stations. This will be a full-time
,
exempt position located in our
Long Beach location.

• Own end-to-end design, development, and integration of in-flight equipment—from concept and requirements through analysis, selection, qualification, manufacturing readiness, and flight verification.
• Develop and maintain packaging layouts for all cargo- optimize equipment placement to meet volume, mass, accessibility, and center-of-gravity constraints.
• Own requirements, run trade studies, and drive decisions with clear engineering rationale.
• Develop qualification and acceptance testing for all in-flight equipment. Design test fixtures, coordinate and execute all testing (off-gassing, flammability, mechanical loads, EMI/EMC, environmental exposure).
• Produce detailed CAD models, engineering drawings, analysis reports, test plans, and concepts of operations; lead hardware through manufacturing/procurement, test, integration, and verification.
• Participate in human-in-the-loop evaluations, mockups, packing studies and fit checks.
• Work cross functionally with teams (Flight Surgeons, Food Scientists, Thermal, ECLSS, Avionics).
• Ensure hardware, packaging, and stowage solutions meet mission requirements, human factors and safety through cross-functional ownership.

• Bachelor’s degree in mechanical engineering, aerospace engineering, or a related engineering discipline.
• 5+ years of mechanical design and analysis experience, including development of mechanical components, systems, or safety-critical equipment.
• 5+ years of experience with CAD and FEA tools.

• Experience developing spaceflight hardware or safety equipment in regulated or high-reliability domains.
• Hands-on experience supporting environmental testing (structural, random vibration, thermal, EMI/EMC).
• Experience with aerospace, medical, or high-reliability packaging systems.
• Experience with flexible packaging, barrier materials, or food-grade polymers.
• Ability to lead trade studies using first-principles reasoning, even with limited data.
• Leadership experience on an engineering or project team.
• Strong ability to use data and analysis to make fast data-driven decisions.
• Demonstrated ownership of hardware from concept through design, build, integration, and verification.
• Excellent communication skills; ability to synthesize inputs across teams (avionics, materials, human factors, structural, safety, procurement).
• Comfort working in ambiguity; ability to move fast, take ownership, and deliver under tight schedule constraints.
• Highly organized individual with excellent documentation practices, attention to detail, and the ability to track information accurately across projects.

• Mechanical Engineer II : $110,000 - $142,000
• Senior Mechanical Engineer: $135,000 - $176,000

Pay Range:
California

$110,000 - $176,000 USD

Base salary will vary depending on job-related knowledge, education, skills, experience, business needs, and market demand. Salary is just one component of our comprehensive compensation package. Full-time employees also receive company…