Systems Engineers focus on defining, designing, and integrating complex systems composed of hardware, software, processes, and people. Their responsibilities include requirements analysis, system modeling, interface definition, trade-off studies, verification, and validation across the system lifecycle. They coordinate across multiple engineering disciplines to ensure components work together as intended under real-world constraints. Systems Engineers use modeling tools, documentation frameworks, and lifecycle management processes. They work in aerospace, defense, transportation, energy, healthcare, and large-scale digital systems. Globally, demand is strong as industries build increasingly complex, interconnected systems requiring structured integration and lifecycle governance.