Sr. Simulation and Modeling Software Develope

About Intuitive Machines

Intuitive Machines is an innovative and cutting‑edge space company making cislunar space accessible to both public and private customers. Our mission is to further science and exploration, communications, and economic progress from the Earth to the Moon and beyond. With the first commercial lunar landing in history, multiple NASA lunar missions in development, and additional private missions on our manifest, we pride ourselves in supporting our customers and the nation in paving the way to return humans to the surface of the Moon.

Our world‑class team includes experts in all aspects of spacecraft subsystems design, development, and test, on‑orbit operations, and safety.

We are seeking a talented and experienced Simulation and Modeling Software Developer to join our Software Simulation team. The role focuses on developing models and building simulations that support design, analysis, and testing of flight software, GNC, and ground software as well as training for flight operations. The candidate will take initiative in developing, maintaining, and improving simulation models, tools, and infrastructure.

The position is multidisciplinary, requiring regular collaboration with subsystem engineers for model development and technical support for simulation environments (HWIL simulations, FDIR testing, operations training, etc.).

• Design, implement, test, and own environmental, vehicle, and I/O simulation models.
• Collaborate with flight software, GNC, and other subsystem engineers to create high‑fidelity environment, sensor, effector, and interface models.
• Create and execute simulation model verification tests.
• Develop and maintain faster‑than‑real‑time and real‑time spacecraft simulations.
• Develop and test hardware‑in‑the‑loop (HWIL) simulations.
• Support Fault, Detection, Isolation, and Recovery (FDIR) testing through fault modeling.
• Write model unit tests and coordinate high‑level testing of implemented models.
• Develop and maintain Software Quality Assurance (SQA) tools.
• Provide simulation support to flight software, ground software, and operations teams.

• Education & Experience:
  • Bachelor's or Master's degree in Aerospace Engineering, Physics, or related field.
  • 5+ years of relevant professional experience preferred.
• Programming
  
  Skills:
  • Proficiency in C, C++, and Python.
• Simulation
  
  Experience:
  • Demonstrated experience developing 6-degrees-of-freedom (6-DOF) simulations.
  • Familiarity with NASA’s Trick simulation framework strongly preferred.
• Domain Expertise (one or more areas):
  • Thermal modeling
  • Propulsion modeling
  • Spacecraft dynamics
  • Orbital mechanics
  • Power system modeling
  • RF communications modeling
  • Sensor modeling (IMUs, star trackers, etc.)
  • Guidance, Navigation, and Control (GNC) software integration
• Development Tools & Processes:
  • Experience with Agile software development methodologies.
  • Proficiency with Git version control and Git Lab.
  • Familiarity with Atlassian tools (Jira, Confluence, etc.).
  • Experience with Docker containerization and Linux environments.
• Preferred Additional
  
  Skills:
  • Thermal analysis and modeling.
  • 3‑D modeling tools (especially Blender) and visualization software.
  • 3‑D spatial reasoning and geometric algorithms.
  • Computer graphics algorithms.
  • Monte Carlo simulation techniques.
  • NASA’s General‑Use Nodal Network Solver (GUNNS).
  • Experience with Core Flight Software (cFS).
  • Custom tool and automation development.

Intuitive Machines is an Equal Opportunity/Affirmative Action Employer. All qualified applicants will receive consideration for employment without regard to race, religion, creed, color, national origin, ancestry, sex (including pregnancy, childbirth, breastfeeding, or medical conditions related to pregnancy, childbirth, or breastfeeding), age, medical condition, marital or domestic partner status, sexual orientation, gender, gender identity, gender expression and transgender status, mental disability or physical disability, genetic information, military or veteran status, citizenship, low‑income status, or any other status or characteristic protected by applicable law.