HII is seeking a skilled and motivated Software Engineer to design, develop, and maintain critical system software components for the US Department of Defense (DoD) Joint Simulation Environment (JSE) at the Joint Integrated Test and Training Center - Nellis (JITTC-N), Nellis AFB, NV. As part of a team providing on-site Modeling and Simulation (M&S) support to establish and deliver high-end Advanced Tactics, Training, and Test capability for Government personnel operating under USAFWC/ACC, this candidate will contribute to the development and maintenance of NAVAIR's Next Generation Threat System (NGTS), a continually evolving synthetic environment generator that provides constructive entities to the battlespace simulation and supports multiple platform/services training, testing, analysis, and research and development. The Software Engineer will leverage their expertise in C++/C, along with strong design skills, to enhance the functionality and integration of NGTS with other JSE components like GRID (Global Reusable Interface Domain) in a complex simulation and training environment. This role requires a solid understanding of software architecture and development best practices.