Mechanical Engineer jobs in California

Relativity Space

Long Beach, CA · $185,000 – $277,000

Relativity Space seeks a principal mechanical engineer to design and oversee manufacturing tooling and factory automation equipment for rocket production. This role suits experienced engineers who thrive on autonomy, enjoy solving novel problems in hardware development, and want to shape how rockets are built at scale.

Listed on Relativity Space’s careers site · Apply there ↗

Relativity Space

Long Beach, CA · $143,000 – $215,000

This role designs and engineers tooling, fixtures, and factory automation equipment that enables the production of Relativity's Terran R rockets and Aeon engines. It suits experienced mechanical engineers who thrive in fast-paced manufacturing environments and want to see their designs impact real production at scale.

Listed on Relativity Space’s careers site · Apply there ↗

Relativity Space

Long Beach, CA · $122,000 – $182,000

This role designs and develops tooling, fixtures, and factory automation equipment that supports manufacturing of Terran R rockets and Aeon engines. It suits experienced mechanical engineers who enjoy solving novel production problems, working across teams, and seeing their designs built and deployed on the factory floor within weeks or months.

Listed on Relativity Space’s careers site · Apply there ↗

Relativity Space

Long Beach, CA · $128,000 – $192,000

Lead a small team of mechanical engineers designing and building launch facility systems for Relativity's Terran R rocket, blending hands-on technical work with mentorship and team growth. This role suits experienced test or launch engineers ready to take on leadership while staying involved in complex mechanical design and integration.

Listed on Relativity Space’s careers site · Apply there ↗

Relativity Space

Long Beach, CA · $143,000 – $215,000

A mechanical engineer designing and developing tooling and automation systems that enable rocket and engine manufacturing at scale. This role suits experienced tooling designers comfortable with full-project ownership in a fast-paced aerospace production environment.

Listed on Relativity Space’s careers site · Apply there ↗

Relativity Space

Long Beach, CA · $185,000 – $277,000

This role designs and oversees the development of manufacturing tools, fixtures, and factory automation equipment for rocket production at scale. It suits experienced mechanical engineers who thrive in fast-paced environments and can manage complex projects from concept through commissioning while collaborating closely with manufacturing and design teams.

Listed on Relativity Space’s careers site · Apply there ↗

Relativity Space

Long Beach, CA · $122,000 – $182,000

Relativity Space is seeking a mechanical engineer to design and develop tooling, fixtures, and factory automation equipment for their Terran R rocket manufacturing facility. This role suits experienced engineers who thrive on solving novel production challenges and want to see their designs directly impact rocket manufacturing at scale.

Listed on Relativity Space’s careers site · Apply there ↗

Relativity Space

Long Beach, CA · $132,000 – $198,000

Design and qualify flow control devices including cryogenic and pneumatic valves for a rocket engine and launch vehicle, combining detailed analysis with hands-on testing and iteration in a manufacturing environment. This role suits experienced engineers who can own problems from initial architecture through flight qualification and want to work directly on hardware that reaches orbit.

Listed on Relativity Space’s careers site · Apply there ↗

Relativity Space

Full-time · Long Beach, CA · $164,000 – $246,000

This role owns the design, analysis, and testing of thermal protection systems for rocket engines that must survive extreme conditions and be reused across multiple flights. It's suited to an experienced structural engineer who thrives on hands-on problem-solving, enjoys mentoring others, and wants to see their work directly impact a real rocket program.

Listed on Relativity Space’s careers site · Apply there ↗

Relativity Space

Long Beach, CA · $124,000 – $170,500

Relativity Space seeks a mechanical engineer to develop structural, fluid, and system designs for their Terran R launch vehicle, working at the Cape where all vehicle systems integrate and launch operations occur. This role suits someone with 5+ years of experience in mechanical design and structural analysis who wants hands-on ownership of launch vehicle hardware and interfaces.

Listed on Relativity Space’s careers site · Apply there ↗

Relativity Space

Long Beach, CA · $143,000 – $215,000

Relativity Space seeks a mechanical engineer to design and develop manufacturing tools, fixtures, and factory automation equipment for rocket production. This role suits someone with substantial experience in tooling design who thrives solving novel problems in a fast-paced manufacturing environment.

Listed on Relativity Space’s careers site · Apply there ↗

Relativity Space

Long Beach, CA · $122,000 – $182,000

You'll design and develop tooling, fixtures, and factory automation equipment that directly enables the production of Terran R rockets. This role suits experienced mechanical engineers who thrive in fast-paced environments, enjoy solving novel manufacturing challenges, and want to see their designs built and used on the factory floor within weeks rather than months.

Listed on Relativity Space’s careers site · Apply there ↗

Relativity Space

Long Beach, CA · $185,000 – $277,000

This role leads the design and development of manufacturing tooling and factory automation equipment for rocket production, combining structural fixtures, assembly systems, and automated processes. It suits experienced mechanical engineers who thrive in fast-paced environments, enjoy solving novel production challenges, and want to see their designs directly impact manufacturing scale and efficiency.

Listed on Relativity Space’s careers site · Apply there ↗