Propulsion Test Technician III

Overview

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. This role is part of a broader mission to advance science, exploration, and innovation, pioneering progress beyond the known.

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.

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.

• 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.

• 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.

• Experience supporting propulsion testing, industrial maintenance, instrumentation, controls, mechanical systems, or related technical environments.
• Ability to perform complex troubleshooting across multiple test system disciplines.
• Ability to coordinate technical work activities.
• Ability to interpret engineering documentation and apply it to field activities.
• Ability to provide technical guidance during maintenance and testing.
• Ability to 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.

• 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.

We offer competitive salary and equity, a generous PTO and sick leave policy, parental leave, an annual learning and development stipend, and more. Compensation 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. If you need a reasonable accommodation, please contact us at accom