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Simulation Software Engineer (Docking)

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CimarronDenver, COJune 17th, 2026

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Position Introduction/Key DutiesCimarron is seeking a Simulation Software Engineer to support docking systems for the Orion program with NASA in either Houston, TX or Denver, CO. The Orion Multi-Purpose Crew Vehicle is NASA's next-generation spacecraft built to carry astronauts beyond low-Earth orbit — back to the Moon and eventually to Mars. As part of the Artemis program, this role puts you at the center of human spaceflight, developing the simulation and ground software systems that prepare crews for deep space missions. If you are driven by a passion for space exploration and want your work to directly support the future of human spaceflight, apply today!Key DutiesPerform Docking Ground Software Systems Engineering for simulation systems supporting Orion MPCV Artemis 3 Spacecraft, including development of ground capabilities, software design, software production, and software test.Perform simulation software (OrionSim) development and unit/functional testing for Orion Docking systems using Agile methodologies.Perform SOCRRATES (SOC) Ground Software Systems Engineering for Orion MPCV Artemis 3, including prototyping ground test, regression, and verification capabilities.Perform simulation software verification and test activities, including developing test procedures, test cases, and dry runs.Track requirements to code and identify applicable test cases when code changes occur.Develop user interfaces to support tester access and real-time status tracking.Coordinate with the DOORS team to interface the internal CM tracking system with IBM Rational DOORS.Develop malfunction scenarios for crew training in support of future Artemis missions.Provide enhancements and defect resolution to SOC simulation architecture, including graphics, audio, and missionspecific model data updates.Deliver monthly status reports on all assigned tasks.Required/Desired Skills, Experience, And Education Required Skills, Experience, and Education :Due to facility security requirements, only U.S. citizens are eligible for consideration at this time.This position requires access to federal facilities. Candidates must possess a valid, unexpired Real ID-compliant driver's license or state-issued identification card at the time of hire. If you are unsure whether your ID is Real ID-compliant, please check for the star symbol in the upper portion of your driver's license or state ID.Ability to complete a pre-employment background check and drug screening, which will include but is not limited to testing for marijuana use.5 or more years of general, full-time work experience. May be reduced with the completion of advanced education.3 or more years of directly related experience in simulation or spacecraft software development.Proficiency in C++ and Python software development.Experience with the full software development lifecycle.Experience with real-time 6 DoF simulation.Extensive experience in debugging and implementing best software engineering practices in large-scale systems.Extensive experience with Linux development environment.Experience with Perforce.Extensive experience with different network protocols ( esp. RUC/RF).Extensive experience troubleshooting software.Experience in multi-threaded applications.Experience with containers.Experience with aerospace engineering concepts (ex., fluid mechanics, orbital dynamics, etc).Experience with software requirements development, design, production, and testing.Experience with Agile software development methodologies.Experience with Atlassian tools (Jira, Confluence, or equivalent).Strong verbal and written communication skills with the ability to convey complex technical concepts clearly.Bachelor's degree in a relevant technical discipline. Desired Skills, Experience, And EducationExperience with OrionSim or Orion Test Labs simulation environments.Experience with MATLAB/Simulink.Experience with Qt Creator.Experience with emulator integration/troubleshooting.Experience with QEMU.Familiarity with SOCRRATES (Software Only CEV Risk Reduction Analysis and Test Engineering Simulator).Knowledge of ODN STE capabilities.Experience with IBM Rational DOORS requirements management.Experience with automated testing, software verification, and HW/SW integration.Familiarity with spacecraft simulation architecture, including graphics, audio, and mission model data updates.Prior work supporting NASA human spaceflight programs.Business ProfileCimarron is a global solutions company with a strategic partnering approach to satisfying customer-driven requirements. We ensure customer success with a modern approach and experienced leadership. Driven by an entrepreneurial spirit, Cimarron is fueled by highly skilled employees, developing new innovative technologies, and delivering superior products and services. We believe in recognizing employees' worth by offering competitive salaries and benefits, including health, dental, and vision insurance, 401(k) contributions, educational reimbursement, and much more. From company communication through Company-wide information meetings led by our President and CEO, to an Awards program designed to recognize our amazing employees and their accomplishments, you will not only feel like you are a part of a team, you will be a valued member of the Cimarron family. Cimarron is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, age, sex, sexual orientation, gender identity, religion, national origin, disability, veteran status, or any other characteristic protected by federal, state, or local law.