Wastewater Treatment Operator

Salary: $42.78 - $51.92 Hourly
Location : Cedar Hills Landfill - 16645 228th Ave SE, Maple Valley, WA
Job Type: Career Service (Exec)
Job Number: 2026SN27344
Department: DNRP-Natural Resources & Parks
Division: SWD -Solid Waste
Opening Date: 07/31/2026
Closing Date: 8/16/2026 11:59 PM Pacific
FLSA: Non-Exempt
Bargaining Unit: Y1 : IUOE L302-Equip Operators
Full- or Part-Time: Full Time
Hours/Week: 40 hours/week


Summary
This recruitment will be used to fill two (2) Career Service vacant positions and may be used to create a list of competitive candidates to fill possible future Wastewater Treatment Operator vacancies within the next 6 months.

King County's Department of Natural Resources and Parks - Solid Waste Division is seeking a Wastewater Treatment Operator who's ready to make a meaningful difference. In this role, you'll help protect our region's environment by supporting the safe, efficient, and compliant operation of wastewater systems that keep our landfill sites running responsibly. Your work will contribute directly to environmental stewardship, regulatory compliance, and the reliability of essential infrastructure across the Cedar Hills Regional Landfill and other remote sites. If you're motivated by work that truly matters and want to help safeguard our community's natural resources, we would be excited for you to join our team!

About this Role

Working under the direction of the Wastewater Treatment Operator - Senior In Charge, this position plays a key role in the operation, maintenance, and repair of pumps, conveyance systems, and wastewater processes at the Cedar Hills Regional Landfill and other Solid Waste Division sites. The role includes monitoring water levels and pump performance, troubleshooting equipment, preparing daily control data sheets and reports, and responding to unusual or emergency situations. This is primarily outdoor work that requires proper preparation for all weather conditions, occasional overnight shifts, and support for Vactor Truck operations. You'll perform hands-on tasks essential to keeping landfill wastewater systems operating safely, efficiently, and in compliance with environmental standards.

About the Team

The Operations Section of the Solid Waste Division runs a countywide transfer and disposal system that keeps waste moving efficiently from local transfer facilities to the Cedar Hills Regional Landfill, where a network of environmental controls manages the by-products of decomposition. It's a dynamic, high-energy environment centered on teamwork, where skilled professionals in transportation, maintenance, landfill operations, landfill gas, and wastewater work together to deliver reliable, responsible service for the community. In this collaborative setting, you'll be supported by a knowledgeable supervisor, communicate frequently, and apply your interpersonal skills while working both independently and as part of a team dedicated to operational excellence. To learn more about SWD visit


Commitment to Equity, Racial, and Social Justice:
King County, named after Dr. Martin Luther King, Jr., is a diverse and vibrant community that represents cultures from around the world. Our True North is to create a welcoming community where everyone can thrive. We prioritize equity, racial and social justice, making it a foundational and daily expectation for all employees. In this position, you will actively apply these principles in all aspects of your work. Learn more about our commitment at


Apply now for a rewarding career at the Solid Waste Division of the King County Department of Natural Resources & Parks. Join our talented workforce in protecting and restoring the natural environment and promoting more resilient, sustainable, and equitable communities. Enjoy training, comprehensive benefits , and growth opportunities.
Job Duties
What You Will be Doing:

• Performing control tests to determine if landfill conveyance systems are operating correctly and effectively, such as measuring water flow and leachate/contaminated storm water extraction efficiency.
• Operating, servicing, and maintaining a variety of equipment, including pumps, valves, motors, meters, computerized motor controls, and related equipment.
• Performing periodic testing of conveyance pump stations, pressure, temperature, water flow, and leachate levels at key locations.
• Inspecting landfill water conveyance equipment and facilities to locate and perform needed repairs.
• Preparing daily control data sheet and compiling other reports and inputting data into computer system.

Experience, Qualifications, Knowledge, Skills
Qualifications You Bring:

• Demonstrated experience working directly with landfill wastewater conveyance facilities and systems with one (1) year experience working on a landfill performing manual labor OR any equivalent combination of experience and education which provides the applicant with the skills, knowledge and ability required to perform the work.
• Experience operating pumps, computerized motors, motors, meters, valves, and related landfill wastewater conveyance equipment.
• Experience performing repairs on landfill wastewater conveyance systems related equipment.
• Troubleshooting skills for complex wastewater systems and processes and complex odor control systems.
• Skill in operating specialized equipment such as forklifts, Vactor trucks, portable pumps, cranes, generators, and safety equipment.
• Skill in the application of safety policies, procedures, and practices for working around landfill gas and untreated wastewater, confined-space entry, fall protection, hazard communication, recognition and control, hazardous energy control, emergency response.
• Demonstrated basic computer skills, including data entry and use of common software programs for reporting and recordkeeping (one year preferred).

Necessary Special Requirements:

• Washington State Driver's License or out of state equivalent
• Successful candidates will be required to complete professional reference checks and pass a physical examination.

Workplace Exposures:

This position involves work at active and closed municipal solid waste facilities, which may pose environmental, chemical, and physical hazards including, but not limited to, odor, noise, dust and traffic.

Competencies You Bring:

• Resourcefulness - Securing and deploying resources effectively and efficiently.
• Communicates effectively - Ability to adapt approach and demeanor in real time to match the shifting demands of different situations.
• Values Differences - Recognizing the value that different perspectives and cultures bring to an organization.
• Interpersonal savvy - Relates openly and comfortably with diverse groups of people.
• Situational Adaptability - Adapting approach and demeanor in real time to match the shifting demands of different situations.

It Would Be Great If You Also Bring:

• Ability to perform mathematical calculations associated with wastewater monitoring and testing
• Knowledge of basic electrical, mechanical, and plumbing trades
• Skill of basic hand and power tools and specialized equipment

Supplemental Information
Working Conditions:

• Work Location: Primary work location is Cedar Hills Regional Landfill located at 16645 228th Ave SE, Maple Valley, WA 98038 with various locations throughout King County, WA.
• Work Schedule: This position works a 40-hour workweek, is non-exempt from the Fair Labor Standards Act and is overtime eligible. This position will likely work a 5/8 schedule Monday through Friday 6:00 a.m. to 2:30 p.m. or 2:30 p.m. to 11:00 p.m. or 4/10 schedule 6 a.m. - 4:30 a.m. In addition, this position may be assigned to be on stand-by on off-shift times and emergency call-out, and must be available for weekends, holidays and on call status which is optional. Solid Waste Division facilities are open seven days a week.
• Union Representation: This position is represented by the International Union of Operating Engineers, Local 302.
• Physical Environment: The incumbents perform field work at Cedar Hills Regional Landfill and associated facilities and must be able to walk long distances and may need to lift and carry up to 50 lbs. The candidate must have the ability to work in confined spaces, climb in and out of tanks using ladders, work inside/outside in heat/cold, wet/humid, inclement weather while on uneven slopes, surfaces, grades and terrain and other adverse conditions such as odor, high volume noise, dust, and heavy traffic. This is primarily an outdoor duty assignment; dressing properly for all weather conditions needs to be considered.

Application and Selection Process: We welcome applications from all qualified applicants. We value diversity, diverse perspectives, and life experience and encourage people of all backgrounds to apply.


Application materials will be screened for clarity, completeness, and alignment with the experience, qualifications, knowledge, and skills essential for this role to determine which candidates may be invited to participate in one or more panel interviews.


To apply, submit a:

• Complete Application including answering the Supplemental Questions
• Optional Resume (will be reviewed if submitted)
• Optional Cover Letter (will be reviewed if submitted)

Note: Additional documents won't be considered during minimum qualification screening.

For more information regarding this recruitment, please contact Susan Ng at


Discover More About the Solid Waste Division: Visit our website at our website at and check us out at | | |


Discover More About DNRP: Visit our , explore an of our recent accomplishments and check us out at , , , , , and


Sign up for to be notified of additional career opportunities with King County. Select the Natural Resources category for DNRP opportunities and explore other categories of interest.


Are you ready to make a difference? dedicated to serving one of the nation's best places to live, work and play.

Application Process

If you are interested in pursuing this position and supporting King County's vision for unified, equitable, and high-performing government, please follow the application instructions carefully. Provide us with your work history as applicable, ensuring that you provide details that highlight your ability to fulfill the requirements for this position.

If you need this announcement in an alternate language or format, or you would like to request accommodation or assistance in the application or assessment process, please contact Susan Ng at


King County's Vision, Mission, and ACTIVATE Values unite us.

King County serves residents with a relentless sense of urgency, delivering on commitments with transparency and accountability. We are action-oriented, creative problem solvers who collaborate across roles, engage directly with communities, and challenge the status quo to achieve meaningful impact. As a unified team, we uphold high ethical and stewardship standards, embrace change, stay curious, and continuously improve. Across all interactions, we listen first, act quickly, and stay aligned as a team to earn and sustain public trust. Learn more about our Vision, Mission, and ACTIVATE Values here and visit our Why work at King County page here .

King County is an Equal Employment Opportunity (EEO) Employer

No person is unlawfully excluded from employment opportunities based on sex, race, color, national origin, ethnicity, religious affiliation, disability, sexual orientation, gender identity or expression, age except by minimum age and retirement provisions, pregnancy, status as a family caregiver, parental status, marital status, military status or status as a veteran who was honorably discharged or who was discharged solely as a result of the person's sexual orientation or gender identity or expression, citizenship or immigration status, genetic information, or other protected class. However, to the extent that distinction or differential treatment on the basis of citizenship or immigration status is authorized by either federal or state law, regulation, or government contract, it is not an unfair practice.

Our EEO policy applies to all employment actions, including but not limited to recruitment, hiring, selection for training, promotion, transfer, demotion, layoff, termination, rates of pay or other forms of compensation.
King County offers a highly-competitive compensation and benefits package designed to meet the diverse needs of our employees and support our employees' health and well-being. Eligible positions receive the following benefits and have access to the following programs:

• Excellent medical, dental, and vision coverage options: King County provides eligible employees with options, so they can decide what's best for themselves and their eligible dependents
• Life and disability insurance: employees are provided basic coverage and given the opportunity to purchase additional insurance for both the employee and eligible dependents
• Retirement: eligible King County employees may participate in a pension plan through the Washington State Department of Retirement Systems and a 457(b) deferred-compensation plan
• Transportation program and ORCA transit pass
• 12 paid holidays each year plus two personal holidays
• Generous vacation and paid sick leave
• Paid parental, family and medical, and volunteer leaves
• Flexible Spending Account
• Wellness programs
• Onsite activity centers
• Employee Giving Program
• Employee assistance programs
• Flexible schedules and telecommuting options, depending on position
• Training and career development programs

For additional information about employee benefits, visit our


This is a general description of the benefits offered to eligible King County employees, and every effort has been made to ensure its accuracy. If any information on this document conflicts with the provisions of a collective bargaining agreement (CBA), the CBA prevails.


NOTE: Benefits for Term Limited Temporary (TLT) or Short Term Temporary (STT) positions, including leave eligibility and/or participation in the pension plan through the Washington State Department of Retirement Systems, will vary based upon the terms and details of the position. Short Term Temporary positions are not eligible for an ORCA transit pass.


For inquiries about the specifics of this position, please contact the recruiter identified on this job posting.
01


Do you have demonstrated experience working directly with landfill wastewater conveyance facilities and systems? NOTE: If you check "Yes," your application materials must demonstrate experience in this area.

• Yes
• No

02


How many years of experience do you have working on a landfill performing manual labor? NOTE: Your application materials must demonstrate experience in this area.

• No Experience
• More than 0, but less than 1 year of experience
• At least 1, but no more than 2 years
• At least 2, but no more than 3 years
• At least 3, but no more than 4 years
• At least 4, but no more than 5 years
• 5 or more years

03


If you checked "No" to Question #1 and/or checked "No Experience" to Question #2, please provide a brief description of the equivalent combination of experience and education which provides the skills, knowledge and ability required to perform the work as noted on the job posting. Provide date(s) and employer(s) where you performed this task. Do not write "see application," as this will be considered an incomplete response.
04


Do you have experience operating pumps, computerized motors, motors, meters, valves, and related landfill wastewater conveyance equipment? If yes, please briefly describe this experience. Your application materials must demonstrate experience in this area. If you do not have this experience, please state N/A.
05


Do you have experience performing repairs on landfill wastewater conveyance systems related equipment? If yes, please briefly describe this experience. Your application materials must demonstrate experience in this area. If you do not have this experience, please state N/A.
06


Please check if you have skill in operating the following specialized equipment. Check all that apply. NOTE: Your application materials must demonstrate experience in these areas.

• Forklifts
• Vactor Trucks
• Portable Pumps
• Cranes
• Generators
• Safety Equipment
• None of the above

07


Please check if you have skill in application of safety policies, procedures, and practices with the following. Check all that apply. NOTE: Your application materials must demonstrate experience in these areas.

• Working around landfill gas and untreated wastewater
• Confined-space entry
• Fall protection
• Hazard communication
• Recognition and control
• Hazardous energy control
• Emergency response and evacuation
• Accident prevention
• Hearing conservation
• Back injury prevention
• Respiratory protection
• Fire safety
• Department facilities and operations
• Forklift training
• Overhead cranes
• Plant-specific and department-wide safety information
• None of the above

08


Briefly describe your experience using computers to perform data entry and maintain records. Include the software or systems you have used and the types of records you maintained. If you do not have this experience, please state N/A.
09


Are you applying to this position as an eligible Priority Placement Program Participant who is a current or previous King County Employee impacted by layoff? ANDIs this position the same or lower percentage of full-time when compared to the position held at the point of the notification of layoff? ANDDo you possess the skills and abilities to qualify for this position?

• Yes, I was given a layoff notice from my Career Service role at King County and I am within two years of the effective date of my layoff. Additionally, the position I was laid off from was the same or a higher percentage of FT status when compared to this one.
• No.

10


If you answered yes to the question above and you are applying for this position as a Priority Placement Participant, to be considered, you must provide the following three pieces of information in the space provided:1. The title you held when you received your layoff notice2. The department you worked in3. The effective date of your layoff
Required Question