Apprentice Propulsion Test Technician

Relativity Space; United States; On-site; USD 32,000 - 48,000; Full time

Benefits offered by this job

Competitive salary & equity

Generous PTO & sick leave

Parental leave

Learning & development stipend

Job summary

Relativity Space is seeking an Apprentice Propulsion Test Technician to join the Stennis Test team, supporting engine testing and the build-out of test stands.

You will install, troubleshoot, and maintain test stand hardware, fabricate fluid tubing, and work with sensors and instrumentation to ensure flight readiness.

Candidates must pass a background check for on-site work in Mississippi; Relativity offers competitive pay, equity, and growth opportunities.

Qualifications

• Experience with fluid/pneumatic systems and their components.
• Experience with electronic circuits and sensor types used to measure temperature, pressure, flow, displacement, and vibration.
• Experience with electronic test equipment, e.g. oscilloscopes, signal generators, and/or multi-meters.

Responsibilities

• Perform installation, checkout, troubleshooting, and maintenance of test stand equipment and hardware.
• Fabrication, installation, troubleshooting, and maintenance of fluid system tubing and hardware.
• Assemble, install, checkout, and maintain sensors for fluid system monitoring.
• Follow procedures, specifications, and test instructions.
• Disassembly and precision cleaning of valves, regulators, and other components.
• Monitor and maintain an inventory of consumables, tooling, and equipment.

Skills

Fluid/Pneumatic systems

Mechanical components

Electronic circuits & sensors

Electronic test equipment

Tools

Oscilloscopes

Signal generators

Multimeters

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 Team:

The Stennis Test team designs, builds, and operates Relativity’s propulsion and stage test stands. Team members are hands‑on with large‑scale, complex systems including fully integrated engines and stage assemblies, pushing hardware to the limits and directly contributing to flight readiness. The work is fast‑paced and highly operational, ideal for those with backgrounds in aviation, automotive, manufacturing, offshore operations, industrial systems, construction, or adjacent industries. You’ll work in a close‑knit, dynamic environment where collaboration between technicians, operators, and engineers is not only encouraged, but expected. As the company scales, the Stennis Test team becomes even more critical to unlocking our next phase of growth: proving out full‑stage systems and paving the way for routine, reliable flights of Terran R.

About the Role:

As an Apprentice Propulsion Test Technician, you will perform functions in daily test operations supporting engine testing, building of new test stand facilities, and modifying existing test stands.

• - Perform the installation, operational checkouts, troubleshooting, and maintenance of test stand equipment and hardware
• - Fabrication, installation, troubleshooting, and maintenance of fluid system tubing and hardware
• - Assemble, install, checkout, and maintain a wide array of components that include sensors for fluid system monitoring
• - Proactively perform work according to procedures, specifications, and test instructions
• - Disassembly and precision cleaning of valves, regulators, and other components
• - Monitor and maintain an inventory of consumables, tooling, and equipment
• - Must be able to lift a minimum of 50 lbs unassisted
• - Must be able to stand for extended periods
• - Must be able to stoop, bend, crawl, and maneuver in tight spaces
• - This position will require occasional night shifts, weekends and possible travel

• - Ability to operate a wide range of hand and power tools for fabrication operations

Skills needed for each focus area:

- Mechanical:

• Experience with fluid/pneumatic systems and their components
• Experience with mechanical components and their systems

- Instrumentation:

• Experience with electronic circuits and sensor types used to measure temperature, pressure, flow, displacement, and vibration
• Experience with electronic test equipment, e.g. oscilloscopes, signal generators, and/or multi-meters

Nice to haves but not required:

• - Experience operating industrial warehouse equipment
• - Operational understanding of sensor types used to measure temperature, pressure, flow, and displacement
• - Experience installing and making repairs to instrumentation, data acquisition systems, and/or avionics systems
• - Experience fabricating, installing, and checking out fluid system tubing and hardware

Successful candidates must clear a background check administered by the US government to obtain clearance for on‑site work at our government partner location in Stennis, Mississippi.

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: $23.27 — $34.90 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] .

Please note: Relativity Space does not accept unsolicited resumes, candidate profiles, or referrals from recruitment agencies or search firms. Any unsolicited submission - via email, our website, social media, or directly to an employee - will be deemed the property of Relativity Space, and no fee will be owed absent a current, fully executed agreement with Talent Acquisition that specifically authorizes submissions for the applicable role.