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Job Description: Cimarron is seeking a Human Landing System (HLS) Software Engineer 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 places you at the forefront of human spaceflight, developing the simulation systems that model critical docked operations between Orion and the Human Landing System (HLS). 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 Duties: Perform systems engineering and SIM software development for Orion Docked Operations scope supporting HLS Interface and Functional checkout and HLS Command/Telemetry Data Path Checkout. Expand Orion's Target Vehicle Actuator Controller (TVAC) model to support Comm capabilities, including canned/faultable telemetry and EWCA alerts. Develop Orion Dynamics simulation models, including creation of an Orion vehicle HLA Federate using FOD's TSFOM interface and implementing timesync updates for incoming HLS Federate states. Develop FOM manager interfaces and integrate summing of Force faults and docking contact modeling in support of ITL joint testing and beyond. Develop Orion ECLSS simulation models covering air exchange, consumption, and crew movement scenarios. Configure and validate OrionHLS/Gateway RF and RUC traffic routing through Sim I/O Pump SpaceWire interfaces and NIC mappings to CCM and Orion switches. Provide lab and integration support, including preparation for and execution of SpaceX emulator integration in the ITL and trajectory updates. Deliver monthly status reports on all assigned tasks. 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 software development or spacecraft systems engineering. Proficiency in C++ software development. Proficiency in 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. Experience with aerospace engineering concepts (ex., fluid mechanics, orbital dynamics, etc). Experience in simulation and modeling for complex systems. 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 related technical field. Desired Skills, Experience, and Education: Experience with MATLAB/Simulink. Experience with HLA (High Level Architecture) simulation frameworks and federate development. Familiarity with spacecraft lab emulators and integration environments. Knowledge of ECLSS simulation or spacecraft life support systems modeling. Experience with SpaceWire interfaces or spacecraft I/O systems. Familiarity with OrionSim or other Orion simulation environments. Experience supporting hardware/software integration in a lab setting. Prior work supporting NASA human spaceflight programs or HLS development. Business Profile: Cimarron 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. job perk: Posted At: 17 hours ago, job perk: Schedule Type: Full-time