3-5 years of previous Water/Waste Treatment Plant experience familiarity of the principles and practices of water/wastewater treatment plant operations, operating principles of valves, pumps, and motors; principles and methods of bacteriological and chemical sewage analyses; effects and problems of industrial waste in water/wastewater treatment processes; safe work practices. 3-5 years of previous Utility Plant experience with familiarity of the principles and practices of Utility Plant operations; operating principles of chillers, compressors, cooling towers, building management systems, water distribution systems, emergency generators and fire pumps, water treatment programs, valves, pumps, and motors; safe work practices.