Avionics Mechanical Engineer II

Relativity; Long Beach (CA); On-site; USD 104,000 - 156,000; Full time

Benefits offered by this job

Equity

PTO & sick leave

Parental leave

Learning stipend

Job summary

Relativity Space is seeking an Avionics Mechanical Engineer for Terran R. You will own the design, analysis, development, and delivery of electro mechanical systems, including enclosures, interfaces, and thermal management, ensuring flight readiness for harsh launch environments.

The role emphasizes hands-on hardware, cross-functional collaboration, and iterating from first principles in a fast-paced aerospace setting.

Qualifications

• Bachelor's or Master's in Mechanical or Aerospace Engineering.
• 3+ years in mechanical design, packaging and thermal management for aerospace or ruggedized electronics.
• Proven delivery from concept to flight.
• Proficient in CAD (SolidWorks, NX) and structural/thermal analysis.
• Hands-on hardware build, testing and debugging.

Responsibilities

• Own the design, analysis, development, and delivery of electro mechanical systems for Terran R avionics.
• Design enclosures, electrical interfaces, thermal accommodations, and interfaces to launch vehicle systems.
• Ensure avionics survive launch and space environments; solve thermal and structural challenges in compact packaging.
• Iterate designs from first principles; perform analysis and testing; drive flight-ready avionics.
• Collaborate across teams to align schedules, requirements, and validation plans.

Skills

Mechanical design

Packaging

Thermal management

Analysis tools

Hardware testing

Cross-functional

Education

Bachelor's or Master's in Engineering

Tools

SolidWorks

NX

Job description

At Relativity Space, we're building rockets to serve today's needs and tomorrow's breakthroughs. Our Terran R vehicle will deliver customer payloads to orbit, meeting the growing demand for launch capacity. But that's just the start. Achieving commercial success with Terran R will unlock new opportunities to advance science, exploration, and innovation, pioneering progress that reaches beyond the known.

Joining Relativity means becoming part of something where autonomy, ownership, and impact exist at every level. Here, you're not just executing tasks; you're solving problems that haven't been solved before, helping develop a rocket, a factory, and a business from the ground up. Whether you're in propulsion, manufacturing, software, avionics, or a corporate function, you'll collaborate across teams, shape decisions, and see your work come to life in record time. Relativity is a place where creativity and technical rigor go hand in hand, and your voice will help define the stories we're writing together. Now is a unique moment in time where it's early enough to leave your mark on the product, the process, and the culture, but far enough along that Terran R is tangible and picking up momentum. The most meaningful work of your career is waiting. Join us.

About The Role

As an Avionics Mechanical Engineer for Terran R, you will own the design, analysis, development, and delivery of electro mechanical systems supporting Terran R Avionics. This includes enclosures, electrical interfaces, thermal accommodations, and interfaces to launch vehicle systems. You will be responsible for ensuring the delivered Avionics can survive launch and space environments, and for solving complex thermal and structural challenges in tight, mass-efficient packaging.

This is a hands-on role for a self-driven engineer who thrives in a fast-paced environment. You'll work from first principles to iterate on designs, perform analysis and testing, and help drive the delivery of flight-ready avionics systems.

About You

• Bachelor's or Master's degree in Mechanical Engineering, Aerospace Engineering, or a related field
• 3+ years of experience in mechanical design, packaging, and thermal management for aerospace or ruggedized electronic systems
• Proven ability to deliver mechanical systems from concept through qualification and flight
• Proficiency with CAD (SolidWorks, NX, or equivalent) and analysis tools for structural and thermal performance
• Hands-on experience building, testing, and debugging hardware in a lab environment
• Strong communication skills and comfort working cross-functionally in a fast-paced, rapidly iterating team environment

Nice To Haves But Not Required

• Familiarity with NASA or other spaceflight structural verification standards, environmental testing and qualification
• Experience designing mechanical systems for launch vehicle or spacecraft avionics
• Experience designing mechanical components for power systems and/or batteries, including material selection and thermal management

At Relativity Space, we are committed to transparency and fairness in our compensation practices. Actual compensation will be determined based on experience, qualifications, and other job-related factors.

Compensation is only one part of our total rewards package. Relativity Space offers competitive salary and equity, a generous PTO and sick leave policy, parental leave, an annual learning and development stipend, and more! To see some of the benefits & perks we offer, please visit here.

Hiring Range: $104,000 - $156,000 USD

We are an equal opportunity employer and value diversity at our company. We do not discriminate on the basis of race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status.

If you need a reasonable accommodation, please contact us at [e-mail].