Job Description

This classification is primarily responsible for the operation and maintenance of wastewater treatment plants, collection systems, drinking water facilities, and water distribution systems of the County to ensure quality operations of wastewater and drinking water systems for the citizens.

Examples of Duties

  • Regular, reliable, and punctual attendance.
    Monitor the wastewater plant processes and water system quality.
    Perform laboratory testing and analysis to ensure compliance with established regulations.
    Troubleshoot problems and maintain system machinery and equipment in accordance with established O&M requirements and for emergency repairs.
    Respond to customer complaints and questions.
    Perform collection system and distribution system responsibilities.
    Perform new construction utility hook ups and locate underground utilities.
    Attend appropriate training relevant to water, wastewater, and sludge as required to keep licenses active and abreast of new laws and technologies.
    Maintain records and logs as required.
    Maintain grounds and buildings.

This is the journey level of the Combined Sewer and Water Operator series. Incumbents in this classification work independently, perform the full range of tasks. Incumbents are expected to exercise initiative and make sound decisions; accept responsibility in the review of the work of others, provide direction or training. This classification requires the incumbent to be able to read and interpret the laws, rules and regulations relating to wastewater and drinking water systems; work independently, providing direction to less experienced staff and with limited supervision; work within an established system and identify variations requiring immediate or prioritized action relating to systems that are multi-faceted and each require distinct knowledge of operation. Employees in this classification will operate from established policies and occasionally be required to develop practices or procedures to accomplish job requirements.  Errors in action or judgment may result in illness and/or injury to the public, lawsuits, decertification of plants and systems and dissatisfied public. Backup systems for error avoidance or detection include established laws and regulations, past practice, peer assistance and evaluation, review by supervisor and review by regulatory agencies.

Incumbents are required to know: laws and regulations regarding the operation and maintenance of wastewater and potable water systems; the technical components of wastewater collection, conveyance, treatment and disposition; and the technical components of a potable water system; acceptable personnel procedures and methods.
Incumbents are required to have the ability to:  Perform duties accurately and timely; make accurate mathematical calculations; perform accurate laboratory tests and analysis; use good judgement in reading and interpreting laws and regulations; analyze and communicate technical data; communicate effectively with the public, other employees and outside professionals;  mentally and physically perform required work; work independently within established guidelines with limited supervision; handle multiple, multi-step tasks simultaneously and prioritize workload for self and others; maintain effective working relationships with other employees in the department, other county departments and regulatory agencies.

Positions in this classification are not responsible for supervision of other employees but may check the work and will provide training to less experienced staff and staff assigned to other shifts.

Minimum Qualifications

(Any equivalent combination of education and experience, which provides the applicant with the knowledge, skills, and abilities, required to successfully perform the job.)
High School Diploma or equivalency
Group II Wastewater Operator Certification
Water Distribution Manager I Certification
Wastewater Collection Specialist I (WWC-1) certification


Valid WA State Driver’s License, incumbents are required to have and maintain a good driving record while employed by the County.
Group II Wastewater Treatment Plant Operator Certification by Washington Department of Ecology
Water Distribution Manager I Certification by the Washington Department of Health Drinking Water Program
Wastewater Collection Specialist I certification by the Washington Wastewater Collection Personnel Association
First Aid/CPR Certification
Confined Space Training Certification
Preferred – Valid WA State CDL with tanker endorsement

Additional Information for Certification Requirements:
Group II Wastewater Operator Certification requires three (3) years of domestic wastewater treatment plant operating experience, up to half (one year and six months) can be substituted with relevant experience or education.
The Water Distribution Manager I Certification requires one (1) year of operating experience at a water system.
Wastewater Collection Specialist I (WWC-1) Certification requires twelve (12) months of experience in a wastewater system.

Any one position may not include all of the duties listed nor do the listed examples include all tasks, which may be found in positions of this class.

Salary $64,134.96 – $77,931.84 Annually
Location  Mason County, WA
Job Type Full-Time
Job Number 202300061
Department Utilities & Waste Division
Opening Date 11/13/2023
FLSA Non-Exempt
Bargaining Unit 14

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