Propulsion Test Technician III

Relativity Space; Kiln (MS); On-site; USD 95,132,000 - 130,806,000; Full time

Job summary

Relativity Space in Mississippi is seeking a Propulsion Test Technician III to install, maintain, troubleshoot and repair propulsion test systems. You’ll coordinate technical activities, provide guidance to technicians, and support test execution in a fast-paced, highly operational environment.

You’ll work on large-scale engines and test stands with cross-disciplinary teams, travel as required, and clear a background check for on-site work at Stennis.

Qualifications

• Experience supporting propulsion testing.
• Industrial maintenance or related technical environment experience.
• Experience with instrumentation and control systems.

Responsibilities

• Perform complex installation, maintenance, troubleshooting, and repair of propulsion test systems and facility equipment.
• Diagnose and resolve system-level mechanical, fluid, and instrumentation issues.
• Coordinate assigned technical activities supporting propulsion test operations.
• Fabricate and install mechanical and instrumentation systems for new or modified test facilities.
• Perform maintenance and functional verification of instrumentation and control components.
• Recommend improvements to maintenance procedures, work instructions, and equipment reliability.
• Support commissioning activities for new or modified test systems.
• Provide technical guidance to technicians during routine testing and maintenance activities.
• Coordinate maintenance activities to support test schedules.
• Perform other duties as assigned.

Skills

Propulsion testing

Industrial maintenance

Instrumentation

Controls

Mechanical systems

Technical guidance

Tools

Data acquisition systems

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 a Propulsion Test Technician III, you will perform complex installation, maintenance, troubleshooting, and repair activities supporting propulsion test operations. This role coordinates technical work, resolves complex equipment issues, and provides operational guidance during test execution.

Responsibilities

• Perform complex installation, maintenance, troubleshooting, and repair of propulsion test systems and facility equipment.
• Diagnose and resolve system-level mechanical, fluid, and instrumentation issues.
• Coordinate assigned technical activities supporting propulsion test operations.
• Fabricate and install mechanical and instrumentation systems for new or modified test facilities.
• Perform maintenance and functional verification of instrumentation and control components.
• Recommend improvements to maintenance procedures, work instructions, and equipment reliability.
• Support commissioning activities for new or modified test systems.
• Provide technical guidance to technicians during routine testing and maintenance activities.
• Coordinate maintenance activities to support test schedules.
• Perform other duties as assigned.

Physical Requirements

• Lift a minimum of 50 lbs. unassisted.
• Stand for extended periods.
• Stoop, bend, crawl, and work in confined spaces.
• Work occasional night shifts and travel as required.

About You:

Experience supporting propulsion testing, industrial maintenance, instrumentation, controls, mechanical systems, or related technical environments.

Ability to:

• Perform complex troubleshooting across multiple test system disciplines.
• Coordinate technical work activities.
• Interpret engineering documentation and apply it to field activities.
• Provide technical guidance during maintenance and testing.
• Identify opportunities to improve equipment reliability and work processes.

Mechanical Focus

• Experience troubleshooting complex fluid systems, valves, regulators, and mechanical assemblies.

Instrumentation Focus

• Experience troubleshooting instrumentation, data acquisition systems, sensors, and control hardware.

Nice to haves but not required:

• Experience supporting commissioning of new test facilities.
• Experience performing root cause investigations.

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:

$33.20 - $45.65 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.

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.