Custodian - South Plant

Wastewater Treatment Division Custodian

This is a transfer opportunity, and first consideration is given to qualified transfer-eligible employees in the job classification family. If no qualified internal candidate is selected, external applicants will be considered. This recruitment may be used to establish a pool of qualified candidates to fill future Custodian positions at the South Treatment Plant for Career Service vacancies within the Wastewater Treatment Division over the next 6 months.

The Wastewater Treatment Division transforms wastewater into valuable resources for the King County community. To have a healthy and sustainable future for all who live, work, and play in King County, what the Wastewater Treatment Division accomplishes is valuable and important. The impact the Wastewater Treatment Division has on King County shows how great it is to work for WTD.

About the Role: The primary function of the Custodian is to maintain the cleanliness of interiors and exteriors of various office and industrial facilities at South Plant.

About the Team: South Treatment plant is part of King County's regional wastewater system and serves south King County. The facility is nationally recognized for its award-winning design and its consistent compliance with state and federal discharge limits. The South Treatment plant strives to engage communities and address the needs of priority communities that they identify for themselves in support of the Division's mission to protect public health and water quality. Our group focuses on equity and social justice and makes this a priority in all our work.

The South Treatment Plant has approximately 170 employees who operate and maintain the plant. The plant also serves as a worksite for construction management personnel and administrative staff. It has a diverse workforce dedicated to supporting the mission of the Wastewater Treatment Division by safely operating and maintaining the facility to comply with environmental regulations.

Join our team dedicated to ensuring clean water for generations to come! With over 1,000 employees engaged in planning, designing, building, and operating treatment facilities, our agency is at the forefront of environmental stewardship. Success for us means upholding our legacy while promising future generations a pristine environment. We enforce regulations to reduce harmful waste discharge and actively educate the public and businesses on water quality protection. We prioritize accountability to our ratepayers and operate a well-managed agency that services over 2.3 million King County residents. If you're passionate about making a difference and thrive in a collaborative environment, join us in our mission to safeguard our precious water resources.

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. As a Custodian, 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 Wastewater Treatment Division of King County Department of Natural Resources & Parks (DNRP). 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:

• Strip, wax and scrub various types of floors; vacuum and extract dirt from carpets and machine-buff floors.
• Clean, stock and sanitize restrooms, kitchens, and public spaces including tables, chairs, toilets, showers, sinks and walls.
• As directed, mix and use cleaning solutions and chemicals.
• Dust, wash and vacuum surfaces.
• Request and stock various types of supplies.
• Empty trash.
• Monitor and report any building, equipment, or safety issues to staff.
• Support grounds maintenance including litter pickup and occasional outdoor tasks.
• Follow established safety protocols and contribute to a culture of health and safety.
• Clean glass windows and surfaces
• May research and prepare bid specifications for cleaning equipment and supplies.

Qualifications You Bring:

• Knowledge of basic janitorial cleaning techniques.
• Knowledge in the use and care of cleaning equipment.
• Knowledge of basic safety rules and procedures to ensure the safety of yourself and co-workers.
• Knowledge of basic cleaning chemicals.
• Effective communication skills and the ability to follow written and verbal instructions.
• Ability to demonstrate behaviors that include fairness, respect, and inclusiveness.
• Ability to work effectively with others in a work environment that embraces and encourages diversity in its workforce and where differences are valued.

Competencies You Bring:

• Customer Focus - Building strong customer relationships and delivering customer-centric solutions.
• Action Oriented - Identifies and seizes new opportunities; Displays a can-do attitude in good and bad times; Steps up to handle tough issues.
• Resourcefulness - Securing and deploying resources effectively and efficiently.
• Manages Conflict - Handling conflict situations effectively, with a minimum of noise.
• Communicates Effectively: Developing and delivering multi-mode communications that convey a clear understanding of the unique needs of different audiences.
• Being Resilient: Rebounding from setbacks and adversity when facing difficult situations.

Required Licenses:

• Washington State Driver's License.

It Would Be Great if You Also Bring:

• One (1) or more years of recent professional industrial cleaning/janitorial work experience

Physical Requirements:

• Lifting up to 50 pounds, twisting, climbing, and bending on a daily basis.

Workplace Exposure:

• Working in a wastewater treatment environment with exposure to some wastewater pathogens, and contaminates.

Working Conditions:

• Work Location: South Treatment Plant - 1200 Monster Road SW, Renton, WA 98057.
• Work Schedule: This full-time position works a 40-hour work week. This position is covered under the provisions of the Fair Labor Standards Act (FLSA) and is overtime eligible.
• Union Representation: This position is represented by S.E.I.U. L925 (Wastewater Treatment Division).
• Physical Requirement: Incumbents performing field work must be able to lift 50 lbs.
• Workplace Exposure: Working in a wastewater treatment environment with exposure to some wastewater pathogens, and contaminates.

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.

Anticipated Timeline for this recruitment: (subject to change)

• Panel interview: Virtual interviews will be held late June 2026
• Candidate selection early July 2026

To apply, submit a:

• Complete Application
• Resume
• Responses to the supplemental questions

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

Who to Contact: For more information regarding this recruitment, please contact Dan Sherman at View email address on click.appcast.io

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,