Make an Impact with Leidos! Leidos National Security Sector has an opportunity in the Integrated Tactical Warning/Attack Assessment (ITW/AA) and Missile Defense mission areas. Your Greatest Work is Ahead! This Software Engineer-UML Modeler role includes trade studies, system engineering, model-based system engineering, model-based system engineering, portfolio analysis, software development demonstration and product testing and deployment to Cheyenne Mountain. Leidos is focused on finding the best people, processes, and tools that will provide solutions in data integration and fusion, data analytics, data mining, predictive analytics, data visualization, and decision support tools. This position will report directly to the Chief Architect.