**Job Description** We are seeking a highly skilled Senior Software Developer to support U.S. military Modeling & Simulation (M&S) efforts. This role involves the design, development, integration, and maintenance of simulation systems used for training, analysis, and decision support in defense environments. The ideal candidate will have deep experience in software engineering as well as a strong understanding of military systems, simulation standards, and real-time/constructive simulations. Key responsibilities: + Design, implement, and maintain simulation software for military training and analysis. + Lead software architecture decisions and mentor junior developers. + Integrate models and simulations with C4ISR systems, data sources, and external interfaces (e.g., DIS, HLA, DDS). + Translate operational military requirements into scalable and reusable software components. + Develop and test simulation scenarios, models, and system behaviors to meet fidelity and performance goals. + Work closely with systems engineers, subject matter experts (SMEs), and military users to validate and verify simulation capabilities. + Ensure compliance with software development standards, security guidelines, and configuration management practices. + Contribute to technical documentation, including design specifications, test plans, and user manuals. **Required Education, Experience, & Skills** Bachelor s degree in Computer Science, Software Engineering, or related field. At least 5 years of software development experience, with at least 2 years in the M&S domain. Proficiency in one or more of the following languages: C , C#, Java, or Python. Experience with simulation frameworks such as HLA (High-Level Architecture), DIS (Distributed Interactive Simulation), or OneSAF, JSAF, VBS, etc. Familiarity with DoD M&S standards and tools (e.g., STOW, RTI, SISO standards). Strong knowledge of software engineering best practices (Agile/Scrum, CI/CD, version control). **Preferred Education, Experience, & Skills** Master s degree Experience with GIS, terrain databases, or synthetic environment generation. Understanding of military doctrine, tactics, and operational scenarios. Experience with containerization technologies (OpenShift, Docker, Kubernetes). Familiarity with cloud platforms or distributed simulation environments. **Pay Information** Full-Time Salary Range: $118504 - $201457 Please note: This range is based on our market pay structures. However, individual salaries are determined by a variety of factors including, but not limited to: business considerations, local market conditions, and internal equity, as well as candidate qualifications, such as skills, education, and experience. Employee Benefits: At BAE Systems, we support our employees in all aspects of their life, including their health and financial well-being. Regular employees scheduled to work 20 hours per week are offered: health, dental, and vision insurance; health savings accounts; a 401(k) savings plan; disability coverage; and life and accident insurance. We also have an employee assistance program, a legal plan, and other perks including discounts on things like home, auto, and pet insurance. Our leave programs include paid time off, paid holidays, as well as other types of leave, including paid parental, military, bereavement, and any applicable federal and state sick leave. Employees may participate in the company recognition program to receive monetary or non-monetary recognition awards. Other incentives may be available based on position level and/or job specifics. **Modeling and Simulation Software Developer** **113506BR** EEO Career Site Equal Opportunity Employer. Minorities . females . veterans . individuals with disabilities . sexual orientation . gender identity . gender expression