Process control engineers configure and optimise DCS, PLCs, APC systems, instrumentation, and industrial sensors to regulate flow, temperature, pressure, and chemical reactions. They tune control loops, analyse process disturbances, implement safety interlocks, and troubleshoot complex control systems in refineries, petrochemical units, food plants, fertiliser plants, and cement manufacturing. Their work ensures process stability, energy efficiency, and compliance with safety standards. With expanding digitalisation and APC adoption, demand remains strong in global process industries.