Wastewater Treatment Operator/Senior Operator

King County | Renton, WA

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Posted Date 11/07/2019

King County WA 

Salary: $64,958 to $90,522 Annually

Close Date: Nov. 19, 2019, 11:59 p.m.

The responsibilities of this classification include operating, monitoring and maintaining wastewater treatment and odor control equipment, systems and processes in a wastewater (primary and secondary) treatment facility and/or the collection and conveyance systems. Responsibilities may also include coordinating, training and providing technical expertise to other wastewater treatment operations staff and coordinating on-site responses to unusual occurrences and emergencies.

Experience, Qualifications, Knowledge, Skills


  • Knowledge of wastewater treatment processes, including preliminary, primary, secondary, digestion, gas handling systems, sludge handling and plant-wide air, water, electrical and hydraulic support systems.


  • Knowledge of collection systems, including pump stations, regulator stations and miscellaneous structures, and of disinfecting methods


  • Knowledge of mechanical and electrical theory, cross-connections, and pumps


  • Knowledge of wastewater terminology and process control


  • Knowledge of industrial safety procedures and practices


  • Knowledge of and skill in applying sampling, testing and laboratory procedures


  • Communications skills


  • Basic mathematics, algebra and computer application skills


  • Skill in reading, recording and interpreting instrumentation and control gauges and meters


  • Skill in operating basic hand and power tools and specialized equipment


  • Skill in operating complex computer control systems and identifying normal and abnormal operating conditions


  • Skill in the interpretation and application of technical information from plant drawings, operations and maintenance manuals and lab tests


  • Skill in manually starting and stopping equipment, systems, and processes


  • Skill in establishing and maintaining work relationships with diverse occupational groups



  • Washington State Wastewater Group I or higher issued from the Washington State Department of Ecology


  • Washington State Driver's License or out-of-state equivalent


  • CPR and first aid certification – can be achieved within the first six months of employment

Job Category
Local Government
Career Level

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