Test Engineer Intern, Build & Operations

At Relativity Space,we’rebuilding 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. Butthat’sjust 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'renot just executing tasks;you'resolving problems thathaven’tbeen solved before, helping develop a rocket, a factory, and a business from the ground up. Whether you’rein 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 storieswe’rewriting together.

Now is a unique moment in timewhereit’searly 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.

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 thelimitsand 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’llwork 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.

As a Test Engineering Intern, you willbe responsible for designing and operating rocket engine test stands for our
Terran R engines and stages. Interns at our Stennis facility work in partnership with experienced operations and
ground systems engineers and technicians to build andmodifytest facilities, as well asparticipatein test
campaigns to flightqualify our hardware. You will be directly engaged in daily test operations, maintenance,
construction, and commissioning activities in the field. The internship may include aspects of both designing
ground systems [Design focus] and conducting test operations [Operations focus].

[Design focus]

• Design advanced propulsion test stands including 3D modeling, fluids, structural, and thermal analysis,
  fabrication drawings, fluids P&IDs,componentlists, and detailed work instructions

• Supervise the construction, commissioning, and initial operations of these facilities

• Solve a variety of technical problems, across broad ranges oftimeframe, complexity, cost, and long-term
  impact

• Support operations on and perform related improvements to existing test stands

[Operations focus]

• Create,modify, andoptimizetest sequences, procedures, and data review processes

• Conduct complex propulsion test operations to assess performance of rocket engines and stages

• Directly control and receive telemetry from the test stand and test articles through GUIs and an
  integrated software suite for control, automation, and data visualization

• Help develop new rocket engine propulsion designs based on real test data

• Current undergraduate or graduate student earning a degree in mechanical engineering, aerospace
  engineering, or a related field

• Prior experience in aerospace is not required

• Varied perspectives & backgrounds strengthen our team

• Strong engineering fundamentals in thermal, structural, and fluids analysis

• Demonstrated drive to deliver on tight schedules, especially when unconventional & creative solutions
  are necessary

• Hands-on fabrication experience using common power tools for projects at work/home/school

• Ability to work occasional night shifts

Stennis Space Center internships will require your own transportation.

We are an equal opportunity employer and value diversity at our company. We do not discriminate on the basis ofrace, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status.