Refinery Systems Technicians work in oil refineries managing processes such as distillation, cracking, and blending. They use control systems, sensors, and monitoring tools to regulate temperature, pressure, and flow. Responsibilities include system operation, maintenance support, troubleshooting, and safety checks. Work environments include oil refineries and petrochemical plants. They follow strict safety and environmental protocols. Their role ensures efficient fuel production, maintains product quality, and supports energy supply, making them essential in petroleum industries globally.