ONSITE Who We Are : Founded in 2007, SimIS Inc. is an innovative information technology solution Veteran Owned Small Business (VOSB) that models future environments, requirements, and capabilities, and then secures the enterprise from internal and external threats compliant with Federal, State, and industry standard governance to ensure client mission success. Our performance standard is "excellence," with an outcomes-based, quality focus in our services and products, guided by our core values of honesty (in word and deed), relationships (confidence and trust with clients and partners), teamwork (shared goals, mission, and purpose), loyalty (allegiance to our client and team), and importance of others (work and win as a team). SimIS is currently recruiting for the listed position and is contingent upon award. Job Description: The ideal candidate will support U.S. military Modeling & Simulation (M&S) efforts with intermediate-level responsibilities in the design, development, integration, and maintenance of simulation systems used for training, analysis, and decision support in defense environments at our Suffolk, Virginia headquarters. The candidate will work with some independence while collaborating with senior developers and contributing to software architecture decisions. This role requires solid experience in software engineering and growing understanding of military systems, simulation standards, and real-time/constructive simulations. The candidate performs the following specific assignments: Designs, implements, and maintains simulation software for military training and analysis Contributes to software architecture decisions and technical design reviews Integrates models and simulations with C4ISR systems, data sources, and external interfaces using DIS, HLA, and DDS protocols Translates operational military requirements into scalable and reusable software components Develops and tests simulation scenarios, models, and system behaviors to meet fidelity and performance requirements Collaborates with systems engineers, subject matter experts (SMEs), and military users to validate simulation capabilities Ensures compliance with software development standards, security guidelines, and configuration management practices Contributes to technical documentation, including design specifications, test plans, and user manuals Mentors junior developers and participates in code reviews Supports system integration testing and troubleshooting Participates in requirements analysis and system design activities Experience Required: Master's degree in Computer Science, Software Engineering, Computer Engineering, or related field OR Bachelor's degree with 3-5 years of relevant software development experience At least 2 years of software development experience, with exposure to M&S domain preferred Proficiency in multiple programming languages: C++, C#, Java, or Python Experience with simulation frameworks such as HLA, DIS, or similar M&S tools Understanding of software engineering best practices including Agile/Scrum methodologies Experience Desired: Experience with DoD M&S standards and tools (STOW, RTI, SISO standards) Knowledge of CI/CD practices and version control systems Understanding of military doctrine, tactics, and operational scenarios Experience with GIS, terrain databases, or synthetic environment generation Familiarity with containerization technologies (Docker, Kubernetes) Experience with distributed systems and real-time processing Special Skills/Knowledge/Training Required/Desired: Strong analytical and problem-solving skills Excellent communication and collaboration abilities Ability to work independently with minimal supervision Strong debugging and troubleshooting skills Experience with software testing and quality assurance practices Benefits: Medical, Dental, and Vision Short-Term Disability (at no cost to you) & Long-Term Disability Life Insurance 401(k) Savings Plan Flex Spending Accounts Tuition Assistance Program Professional Development Paid Time Off (PTO) 11 Federal Holidays each year SimIS, Inc. is an EOE / M / F / Disability / VET / Drug Free Employer