Supervisors in this unit group supervise and co-ordinate the activities of workers in the following unit groups: Petroleum, Gas and Chemical Process Operators (9232), Power Engineers and Power Systems Operators (9241), Water and Waste Treatment Plant Operators (9243).Chemical Plant Machine Operators (9421) and Labourers in Chemical Products Processing and Utilities (9613), They are employed by petroleum and natural gas processing, pipeline and petrochemical companies, chemical and pharmaceutical companies, electric power utilities, water and waste treatment utilities and in a range of other industries and institutions.
