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Simulation Engineer I

Relativity Space

Relativity Space

Long Beach, CA, USA
Posted on Saturday, September 16, 2023

Company Overview:

A rocket company at the core, Relativity Space is on a mission to become the next great commercial launch company. Meeting the needs of a growing demand for space infrastructure, our rockets will revolutionize how we connect and communicate on Earth by getting satellites to space. We have developed a vertically integrated technology platform in which we leverage additive manufacturing, artificial intelligence, and autonomous robotics to 3D print rockets. Our unique approach enables rapid product iteration, allowing us to push the boundaries of what's possible today and unlock the full potential of 3D printing for tomorrow. Join us on this extraordinary journey, as we work together to transform our vision into reality.


The Integrated Performance department at Relativity Space is responsible for ensuring that our rockets will achieve our overall objectives and satisfy stringent customer and government requirements. Our department comprises teams responsible for Flight Sciences, including Aerodynamics, Thermal, Loads, and Dynamics; Integrated Structures Analysis; Guidance, Navigation, and Control & Vehicle Performance (GNCP); Systems Engineering; Mission Reliability; and Product Engineering. We architect and execute analysis, simulation, operations, and test projects for all of Relativity’s hardware and software teams in pursuit of mission success. Overall, this department is critical to the launch success of Terran R!

This is an entry-level technical role in the GNC & Performance team within the Integrated Performance department. We have multiple roles available in each of our three sub-teams: GNC, Vehicle Performance, and GNC Simulation. Day to day, Simulation Engineers work on design, analysis, and tools development projects across every launch system, from launch pads to engines to avionics and beyond.

What you’ll do:

  • Integrate multi-disciplinary tools together to build system level simulations
  • Design customer missions using trajectory optimization tools
  • Prototype and test flight GNC algorithms
  • Develop software to accelerate running, post processing and analyzing simulation data for verifying vehicle performance
  • Perform analysis to propose future vehicle upgrades and architectural changes
  • Design, develop, analyze and test GNC algorithms for Terran R ascent and entry, descent, and landing
  • Perform software- and hardware-in-the-loop testing with partner teams like Avionics and Flight Software

What you need to know:

  • An undergraduate degree in engineering or related field and practical engineering experience, e.g., from project teams, internships, or research labs
  • Passion for launch vehicles and spacecraft
  • Experience solving challenging technical problems with simulation in teams
  • Proficiency with Python

Nice to haves but not required:

  • A graduate degree (MS/PhD) in engineering or related field
  • Familiarity with launch vehicles and liquid rocket propulsion
  • Proficiency in C++

Relativity Space offers competitive salary and equity, a generous vacation policy, an annual L&D stipend and more!

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.

The below-range represents Relativity Space’s current good-faith pay scale for this role. Relativity Space reserves the right to modify or update this range at any time.

Compensation is only one part of our entire total rewards package. To see some of the benefits & perks we offer, please visit here:
Hiring Range:
$110,000$143,000 USD