Avionics Mechanical Engineer II

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

Benefits offered by this job

Competitive salary and equity

Generous PTO and sick leave policy

Parental leave

Learning and development stipend

Job summary

Relativity Space in Long Beach, CA is seeking an Avionics Mechanical Engineer for Terran R. You will own the design, analysis, development, and delivery of electro mechanical systems for avionics, including enclosures, interfaces, thermal management, and launch-vehicle integration.

This hands-on role requires CAD proficiency, 3+ years in aerospace packaging, and a track record delivering systems from concept to flight.

Qualifications

• 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.

Responsibilities

• Own the design, analysis, development, and delivery of electro mechanical systems supporting Terran R Avionics.
• Include enclosures, electrical interfaces, thermal accommodations, and interfaces to launch vehicle systems.
• Ensure the delivered Avionics can survive launch and space environments, and solve complex thermal and structural challenges in tight, mass-efficient packaging.
• Operate in a hands-on, self-driven role, iterating from first principles, performing analysis and testing, and driving flight-ready avionics delivery.

Skills

Mechanical design

Packaging

Thermal management

CAD tools

Analysis tools

Hardware build/test

Cross-functional collaboration

Communication

Education

Bachelor’s or Master’s degree in Mechanical Engineering or Aerospace Engineering

Tools

SolidWorks

NX

Test equipment

Lab instrumentation

Job description

At Relativity Space, we’re building rockets to serve today’s needs and tomorrow’s breakthroughs. OurTerran R vehicle will deliver customer payloads to orbit, meeting the growing demand for launchcapacity. But that’s just the start. Achieving commercial success with Terran R will unlock newopportunities to advance science, exploration, and innovation, pioneering progress that reaches beyondthe 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. Nowis a unique moment in time where it’s early enough to leave your mark on the product, the process, andthe culture, but far enough along that Terran R is tangible and picking up momentum. The mostmeaningful 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.

Why Relativity?

Are you willing to work 5-days on-site at our HQ in Long Beach, CA 90807? If you are not local, we offer a relocation package.

Export Compliance

As defined in the ITAR, "U.S. Persons" include U.S. citizens, lawful permanent residents (i.e., Green Card holders), and certain protected individuals (e.g., refugees/asylees, American Samoans). Please consult with a knowledgeable advisor if you are unsure whether you are a "U.S. Person." The person hired will have access to information and items controlled by the International Traffic in Arms Regulation (ITAR), and, therefore, must either be a "U.S. person" as defined by those regulations or otherwise eligible for a federally issued export control license.

Voluntary Self-Identification

As set forth in Relativity Space’s Equal Employment Opportunity policy, we do not discriminate on the basis of any protected group status under any applicable law.

A "disabled veteran" is one of the following: a veteran of the U.S. military, ground, naval or air service who is entitled to compensation (or who but for the receipt of military retired pay would be entitled to compensation) under laws administered by the Secretary of Veterans Affairs; or a person who was discharged or released from active duty because of a service‑connected disability.

A "recently separated veteran" means any veteran during the three‑year period beginning on the date of such veteran's discharge or release from active duty in the U.S. military, ground, naval, or air service.

An "active duty wartime or campaign badge veteran" means a veteran who served on active duty in the U.S. military, ground, naval or air service during a war, or in a campaign or expedition for which a campaign badge has been authorized under the laws administered by the Department of Defense.

An "Armed forces service medal veteran" means a veteran who, while serving on active duty in the U.S. military, ground, naval or air service, participated in a United States military operation for which an Armed Forces service medal was awarded pursuant to Executive Order 12985.

Voluntary Self-Identification of Disability

Form CC-305

Page 1 of 1

OMB Control Number 1250-0005

Expires 07/31/2029

• Alcohol or other substance use disorder (not currently using drugs illegally)
• Autoimmune disorder, for example, lupus, fibromyalgia, rheumatoid arthritis, HIV/AIDS
• Blind or low vision
• Cancer (past or present)
• Cardiovascular or heart disease
• Celiac disease
• Cerebral palsy
• Deaf or serious difficulty hearing
• Diabetes
• Disfigurement, for example, disfigurement caused by burns, wounds, accidents, or congenital disorders
• Epilepsy or other seizure disorder
• Gastrointestinal disorders, for example, Crohn's Disease, irritable bowel syndrome
• Intellectual or developmental disability
• Mental health conditions, for example, depression, bipolar disorder, anxiety disorder, schizophrenia, PTSD
• Missing limbs or partially missing limbs
• Mobility impairment, benefiting from the use of a wheelchair, scooter, walker, leg brace(s) and/or other supports
• Nervous system condition, for example, migraine headaches, Parkinson’s disease, multiple sclerosis (MS)
• Neurodivergence, for example, attention‑deficit/hyperactivity disorder (ADHD), autism spectrum disorder, dyslexia, dyspraxia, other learning disabilities
• Partial or complete paralysis (any cause)
• Pulmonary or respiratory conditions, for example, tuberculosis, asthma, emphysema
• Short stature (dwarfism)
• Traumatic brain injury

PUBLIC BURDEN STATEMENT: According to the Paperwork Reduction Act of 1995 no persons are required to respond to a collection of information unless such collection displays a valid OMB control number. This survey should take about 5 minutes to complete.