Simulation Engineers build computational models that replicate real-world systems to study behavior, performance, and interactions before physical implementation. Their work includes defining simulation requirements, developing mathematical and computational models, running scenarios, and interpreting results to inform design and decision-making. They apply physics-based modeling, numerical methods, and system simulations across mechanical, electrical, environmental, and socio-technical systems. Simulation Engineers work in aerospace, automotive, energy, infrastructure, healthcare, and defense sectors. Globally, demand remains strong as organizations rely on simulation to reduce development cost, improve safety, accelerate innovation, and evaluate complex systems under uncertain conditions.