Website Relativity Space

Mechanical Engineer Job Highlights

Title Mechanical Engineer
Type Full Time
Experience Required
Function Engineering/Information Technology
Location Stennis, MS, United States
Company Relativity Space

Company Profile

Relativity Space is building humanity’s multi-planetary future by using software-defined manufacturing, artificial intelligence, 3D printing, and autonomous robotics. The company’s long-term vision is to upgrade humanity’s industrial base on Earth and on Mars.

Job Profile

The company is looking for a highly talented Mechanical Engineer (formal title will be Propulsion Test Engineer) who will help build the core of our propulsion capability via the development and operation of a world-class test facility for components, engines, and integrated launch vehicle stages.

The Propulsion Test Engineer may focus on design, operations, or both.

As part of this team, a candidate will help build and operate massive outdoor test stands at the historic Stennis Space Center on the Gulf Coast, the largest rocket engine test complex in the country.

Educational Qualification

  • The applicants should have passed a Bachelor’s Degree in Mechanical Engineering, Aerospace Engineering, or a related field from a college/university.

Work Experience

  • Experience with 3D Computer-Aided Design (CAD).
  • Hands-on experience, particularly with common power tools, air tools, metalworking, welding, plumbing, hydraulics, manufacturing equipment, etc.


Design Focus-

  • Design advanced propulsion test stands, including 3D modeling, fluids, and structural analysis, fabrication drawings, fluids P&IDs, and instrumentation lists.
  • Potentially travel to production, test, and launch locations.
  • Solve a wide range of technical challenges, across broad ranges of timeframe, complexity, cost, and long-term impact.
  • Supervise the construction, commissioning, and initial operations of these facilities.
  • Support operations on and perform related improvements to existing test stands.

Operations Focus-

  • Create, modify, and optimize test sequences, procedures, and data review processes.
  • 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 propulsion designs based on real test data.
  • Lead testing operations under high-intensity conditions, with attention to detail, to achieve test objectives.
  • Potentially travel to and from production, test, and launch locations.

Preferred but Not Required

Design Focus-

  • Demonstrated safe use of machine tools such as a mill or lathe.
  • Experience designing, fabricating and operating complex fluid systems.
  • Experience leading a diverse team of engineers and technicians.
  • Experience operating or working near mobile equipment such as forklifts and cranes.
  • Experience with FEA or CFD.
  • Knowledge of manufacturing processes, material selection, inspection, precision measurement, and non-destructive testing.
  • Ownership of propulsion or structural test-related project including design, analysis, construction, and commissioning.
  • Proficiency in 3D modeling and drafting, including GD&T.

Operations Focus-

  • Ability to observe anomalous conditions in real-time, investigate, and quickly resolve to enable a rapid testing pace.
  • Experience leading a diverse team of engineers and technicians.
  • Experience safely operating complex fluid systems, including high-pressure gas, cryogenic fluids, flammables, and hydraulics.
  • Familiarity with data/control systems, specifically programmable logic controllers, data acquisition hardware, and control software.
  • Familiarity with rocket engine injectors, chambers, nozzles, valves, pumps, and other components.
  • Strong interpersonal skills and ability to safely and efficiently conduct fast-paced hazardous operations on a small ops team


  • Ability to develop and review complex fluid P&IDs.
  • Ability to work in a fast-paced and intense startup environment.
  • Basic knowledge of common fluid, structural components, and instrumentation, such as valves, regulators, hydraulic actuators, pressure transducers, thermocouples, flow meters, accelerometers, strain gauges, load cells.
  • Ownership of projects from beginning to end, with minimal oversight.


  • The company offers a competitive salary and equity, a generous vacation policy, an annual L&D stipend, and more.

Employer’s Statement

Relativity Space is an equal opportunity employer and values diversity at our company. It does not discriminate on the basis of race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status.

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