A Director of Human Systems Integration (HSI) is a senior professional responsible for overseeing the integration of human factors into the design and operation of systems, products, or environments. Their role ensures that human capabilities and limitations are considered in system development to optimize performance, safety, and user experience. They collaborate with engineering, design, and project management teams to incorporate ergonomic, cognitive, and organizational factors. Directors of HSI often work in industries such as defense, aerospace, healthcare, or transportation, where complex human-machine interactions are critical. This position requires expertise in systems engineering, human factors, and project leadership.