A first line supervisor is responsible for overseeing the daily work activities of production workers and operators in a manufacturing facility. The types of workers you oversee include inspectors, precision workers, machine setters, assemblers, and fabricators. Your job duties include enforcing safety regulations, coordinating the daily production activities of the various workers, and inspecting materials and finished products for defects. You also work with plant supervisors to establish schedules and production targets. This job is found in any production-focused industry such as automotive, technology, shipping warehouses, and other assembly line type facilities.