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 IV, you will lead highly complex technical work supporting propulsion test facilities and engine testing operations. This role serves as a technical resource for challenging maintenance, troubleshooting, and system integration activities while supporting continuous improvement of test operations and facilities.
Responsibilities
- Lead installation, maintenance, troubleshooting, and repair activities involving propulsion test systems and facility infrastructure.
- Resolve complex system issues involving mechanical, fluid, instrumentation, and control systems.
- Coordinate technical execution of major facility modifications and test stand upgrades.
- Support planning, commissioning, and operational readiness of new test facilities.
- Develop and improve maintenance procedures, work instructions, and operational documentation.
- Collaborate with engineering teams to support system improvements and failure investigations.
- Provide technical guidance for complex maintenance and troubleshooting activities.
- Recommend improvements that enhance safety, reliability, maintainability, and operational efficiency.
- Support evaluation of equipment performance and implementation of corrective actions.
- 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 complex propulsion testing, industrial maintenance, instrumentation, controls, mechanical systems, or related technical operations.
Ability to:
- Lead complex troubleshooting and maintenance activities.
- Evaluate equipment performance and recommend corrective actions.
- Develop or improve technical procedures and maintenance practices.
- Coordinate technical activities across multiple work groups.
- Communicate technical information with engineers, technicians, and operations personnel.
Mechanical Focus
- Experience with installation, troubleshooting, and maintenance of complex propulsion fluid systems and mechanical equipment.
Instrumentation Focus
- Experience with installation, troubleshooting, calibration, and maintenance of instrumentation, sensors, data acquisition systems, and control hardware.
Nice to haves but not required:
- Experience supporting new facility commissioning or major system integration projects.
- Experience supporting continuous improvement initiatives involving test operations.
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.
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 accommodations@relativityspace.com.