Flight Dynamics Engineer

York is seeking a Flight Dynamics Engineer to support the design, analysis, and development of spacecraft flight dynamics and mission analysis software across a range of commercial and national security missions. Level of expected ownership for responsibilities increases with engineer level. This individual will work within the Flight Dynamics team to define software architecture, develop and validate algorithms and models, support flight operations, and mentor junior engineers. Salary based on experience. Responsibilities Develop, maintain, and enhance flight dynamics modeling and simulation tools in Python for use by internal engineering teams and other York software while maintaining an existing software suite. Contribute to systems engineering and software architecture, including defining interfaces, identifying technical requirements, and designing scalable solutions for flight dynamics applications. Translate designs, algorithms, and technical requirements into clean, readable code Maintain and improve existing flight dynamics and astrodynamics software suite while introducing new capabilities as mission needs evolve. Develop comprehensive unit, integration, and validation tests and create clear technical documentation for internal users and developers. Validate the accuracy, performance, and robustness of simulation and modeling tools. Perform orbit determination and orbit analysis including interpretation and assessment of results from flight dynamics tools. Support the deployment, integration, and operation of orbital dynamics and mission feasibility tools within ground station and mission operations environments. Performing orbit analysis, orbital determination and analysis functions Provide astrodynamics analytical support for mission design, trajectory analysis, spacecraft operations, and feasibility assessments. Collaborate with software, systems engineering, mission operations, and other technical teams to solve complex multidisciplinary problems. Define, develop, and maintain high-fidelity simulation environments supporting mission architecture development and day-in-the-life simulations across a variety of mission profiles. Required Qualifications A bachelor’s degree in aerospace engineering, computer science, or related technical field from accredited university 2-8 years of experience in spacecraft GNC, flight dynamics systems, ground software or similar Experience with Python software development and testing Background in orbital dynamics and spacecraft subsystems. Experience with software architecture and designing reusable scientific or engineering software libraries. Strong analytical, problem-solving, written, verbal, and presentation skills. Collaborative and effective in team environments. Must be able to obtain and maintain a U.S. security clearance; U.S. citizenship required. Willingness to work full-time in our Greenwood Village, CO office Preferred Qualifications Experience with software development practices including version control, automated testing, debugging, code reviews, and technical documentation. Familiarity with C++, MATLAB, or other scientific computing languages. Experience with spacecraft mission operations and day-in-the-life analysis. Familiarity with modern software development tools and practices, including CI/CD, automated testing, package management, and collaborative development workflows. Experience integrating flight dynamics software into operational ground systems or ground stations. Experience with industry-standard GNC tools such as STK, GMAT, or equivalent. Experience analyzing spacecraft dynamics, control theory, and propulsion performance as they relate to trajectory design and constellation geometry. Experience developing flight dynamics, mission analysis, or ground software for spacecraft. Experience with orbit determination, orbit propagation, trajectory analysis, or mission design. Experience developing high-fidelity spacecraft or mission simulations. Familiarity with numerical methods, estimation techniques, filtering, optimization, or statistical analysis.