Combined Sewer and Water Operator III
Listed on 2026-06-14
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Engineering
Environmental Engineer, Wastewater Treatment, Water Management
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.
OverviewThis 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.
Essential Functions- Regular, reliable, and punctual attendance.
- Monitor 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‑up inspections and locate underground utilities.
- Inspect infrastructure and advise management regarding maintenance, operational, and safety problems and recommend corrective action.
- 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.
- Keep necessary inventory for testing and maintenance needs.
This is the expert level of the Combined Sewer and Water Operator series. Incumbents in this classification work independently, perform the full range of tasks, and may be assigned to complete the most complex assignments. Incumbents are expected to exercise initiative and make sound decisions; accept responsibility in the review of the work of others, provide direction or training; and may address issues which are not explicitly covered by established policies, rules, and regulations.
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.
- High school diploma or GED.
- Two (2) years of underground utility installation and heavy equipment operation experience.
- Group III Wastewater Operator Certification requires 4 years of domestic wastewater treatment plant operating experience, with at least 2 years at a Class II or higher plant, and 90 relevant credits/CEUs.
- The Water Distribution Manager Certification requires three (3) years of water system experience, 12 months of which must be as an operator of a water system.
- A Wastewater Collection Specialist I (WWC‑1) certification requires 12 months of experience in a wastewater system.
- A Cross Connection Specialist certification requires six months of operating experience in a public water system.
- Valid Washington State Driver’s License, with a good driving record while employed by the County.
- Group III Wastewater Treatment Plant Operator Certification by Washington Department of Ecology.
- Water Distribution Manager II Certification by Washington Department of Health Drinking Water Program within a year of hire.
- Wastewater Collection Specialist I certification by the Washington Wastewater Collection Personnel Association.
- Cross Connection Specialist Certification by Washington Department of Health Drinking Water Program.
- First Aid/CPR Certification.
- Confined Space Training Certification.
- Preferred:
Valid WA State CDL with tanker endorsement.
Health Insurance
:
Medical, dental, and vision coverage for eligible adults and dependents.
Retirement Plans
:
Enrollment in Washington State's Department of Retirement Systems programs: PERS, PSERS, or LEOFF, with contributions from both employee and employer.
Paid Leave
:
Sick leave, holidays, and vacation time per County policies.
Life & AD&D Insurance
:
County-paid basic life and AD&D insurance.
Employee Assistance Program (EAP): 24/7 supportive services.
Educational Assistance
:
Reimbursement for approved courses relevant to the role.
Longevity Rewards
:
Additional monthly compensation for continuous service milestones.
Mason County is an equal opportunity employer that celebrates diversity and upholds fair employment practices.
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