- Monitor system operation status and PH level, and check and report equipment operating status. - Check the sedimentation of the sludge to assess the current sludge condition - Mixing chemicals to ensure that the amount of chemicals is always supplied to the system - Perform other tasks as required by management - Discuss more during the interview - Intermediate level or higher - Expertise in environmental, mechanical, electrical, (manufacturing, repair, assembly, maintenance, equipment systems ..) - Minimum 3/7 . welding skill