ManTech International seeks a Simulation Developer to build and optimize mission-critical models for defense and aerospace missions within our IT & Data Management team. You will design and implement real-time and physics-based simulations, integrate them with secure enterprise systems, and support analysis, training, and mission rehearsal. Collaborating in a mission-focused, innovative culture, you’ll apply strong C++/C# skills, modeling frameworks, and data-driven approaches while growing through robust training, career development, and competitive pay and benefits.