Modeling and Simulation Developer with Security Clearance

MANTECH seeks a motivated, career and customer-oriented SOFTWARE DEVELOPER (MODELING AND SIMULATION) to join our team in QUANTICO, VA Join a high-impact team supporting the Marine Corps Warfighting Lab's transition to digital wargaming. As a Simulation Developer, you will serve as a trusted advisor to our customers, ensuring the technical architecture of wargames is robust and reliable while directly shaping the tools used to prepare Marines for the future fight. Responsibilities include but are not limited to:

• Designs, develops, and sustains simulation models and environments using a variety of programming languages, tools, and data sources
• Integrates models and simulations into larger system architectures and supports Marine Corps Warfighting Laboratory (MCWL) Wargaming Division efforts for interoperability testing and model orchestration
• Collaborates with engineers, analysts, and operational subject matter experts to enhance model fidelity and ensure simulation accuracy
• Implements new features, conducts model testing and validation, and troubleshoots issues across evolving simulation platforms
• Leads and supports planning, coordination, and documentation activities for simulation projects, including data collection, stakeholder alignment, and capability tracking Minimum Qualifications:
• Bachelor's degree in Computer Science, Software Engineering, Game Development, or a related technical field
• Minimum of 7 years of software development experience focused on simulation or game-based environments. A total of 9 years with an associates degree and 10 years' experience without a degree.
• Proficiency in programming languages such as C++, C#, Python, or Java
• Experience with simulation platforms or engines such as AFSIM, NGTS, OneSAF, Unity, Unreal Engine, Simio, or Arena
• Familiarity with version control systems and collaborative software development workflows

Preferred Qualifications

• Understanding of modeling and simulation principles in military or operational contexts
• Familiarity with mission engineering, wargaming, campaign analysis, or Naval Capabilities Integration Process (NCIP), and associated military systems/processes
• Knowledge of 3D graphics, physics engines, and database management systems (e.g., SQL)
• Experience applying Agile or Scrum development methodologies in simulation projects
• Strong communication, analytical, and cross-functional collaboration skills Clearance Requirements:
• Must possess a current/active TS/SCI security clearance.

Physical Requirements

• Must be able and willing to perform occasional manual labor and warehouse duties, with the ability to lift up to 50 pounds. Must be able to remain in a stationary position 50% of the time.
• Needs to occasionally move about inside the office to access file cabinets, office machinery, etc.
• Frequently communicates with co-workers, management, and customers, which may involve delivering presentations. Must be able to exchange accurate information in these situations