King CountySeattle 98104
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Industrial Maintenance Mechanic/master Mechanic

King County
Temporary King County Water and Land Resources, 201 S Jackson St # 600, Seattle, WA 98104, United States


*(5) Vacancies exist with this posting*
Wastewater Treatment Division (WTD) is deeply dedicated to upholding the principles of equity and social justice (ESJ). We place a high value on embracing diverse perspectives and life experiences within our workforce, as we strive to foster a culturally diverse and inclusive environment. Our unwavering commitment lies in delivering equitable services to residents and businesses across King County. Rooted in our department's vision, we aspire to create sustainable and livable communities, along with a pristine and healthy natural environment that fortifies a thriving and resilient economy.   

Maintaining and repairing Plant process equipment allows (WTD) to meet all DOE permit requirements. Do in no small part to our environmental stewardship the South Treatment plant has won Gold and Platinum awards from the National Association of Clean Water agencies for the past 25 years.

King County is a great place to work providing competitive pay and a comprehensive benefits package that is second to none. A 4-10 schedule provides an attractive work life balance that is ideal when raising a family.

WHO MAY APPLY:  Open to all qualified candidates. Current S.E.I.U. 925 members have first consideration.This recruitment is to fill (5) Term-Limited Temporary position that is anticipated to end until September 2025. If filled by a King County employee who has passed their initial probation period this position will be filled as a (2) year Special Duty Assignment. These position can be filled at the Industrial Maintenance Mechanic or Industrial Maintenance Mechanic based upon level of experience. 

Salary Ranges for each role:

Industrial Maintenance Mechanic- $34.9769-$44.3354

Industrial Maintenance Mechanic - Master-$40.3226-48.7470


  • Work Location: South Treatment Plant (1200 Monster Road Renton, WA 98057)
  • Work Schedule:  4/10 schedule 
  • Union Representation: S.E.I.U. 925 
Job Duties
  •  Repairs, maintains, installs, and adjusts a variety of wastewater treatment plant, reclamation plant, and waterworks facilities to include chemical feed and processing equipment, as well as food waste processing equipment; belt, chain, and screw conveyors; sluice gates, Bio-Gas scrubbing compressors; oxygen-production and distribution equipment; electric oil-hydraulic elevators; mechanical, structural, and plumbing apparatus; industrial pumps, hydraulic controls and regulators, valves and allied piping systems; and diesel engines and related co-generation equipment.
  • Fabricates parts and fittings; analyzes part failure/malfunction and considers alternatives; makes assemblies and repairs units used in maintenance work from work orders, drawings, specifications, sketches, and verbal instructions.
  • Diagnoses, disassembles, and removes damaged parts from equipment; reassembles and tests for normal function.
  • Uses hand and power tools such as drill and hydraulic presses, jacks, grinders, power saws, pipe threaders, and bending machines.
  • Uses precision measuring instruments such as height and depth gauges, calipers, verniers, and micrometers of various types; operates machining equipment such as lathes, mills, band saws, grinders, drill and hydraulic presses, and pipe threaders.
  • Uses gas and arc welding equipment in cutting, forming, joining, building-up metal, and fabricating parts.
  • Sets up and operates necessary rigging equipment to move or place heavy equipment in repair and installation work, using up to and including a 15-ton bridge crane; operates a variety of equipment while engaged in mechanical maintenance work such as mobile cranes, scissor lifts, aerial lifts, and powered industrial trucks such as forklifts.
  • Performs plumbing and pipe work including troubleshooting issues and performing plumbing repairs; assists in the design and layout of new piping projects and recommends and coordinates the ordering of materials; constructs the pipe assembly and performs leakage tests.
  • Monitors the functioning of HVAC equipment and performs routine maintenance; performs minor repairs; prepares brief reports on equipment condition.
  • Performs routine scheduled preventative maintenance tasks related to lubrication, filter systems, drive components, and equipment adjustment; conditions monitoring measurements; performs tests on equipment.
  • Makes rough estimates of labor and materials necessary for performance of the work; keeps records and makes reports of work performed.
  • Directs the work of one or more assistants; instructs them in proper work procedures and safety precautions.
  • Makes sketches of work to be performed or of work completed.
  • Works underground in sewers, channels, or other structures to remove obstructions or make repairs.
  • Maintains boilers and other heating equipment.
  • May perform the simpler hand tasks of a blacksmith such as forging, sharpening, tempering, and straightening.
  • May perform routine carpentry and preservation work on plant equipment and facilities.
  • Enters data into automated or computer maintenance management system (CMMS).
  • Performs other related duties and responsibilities as required.

Experience, Qualifications, Knowledge, Skills

Highly desirable on any combination of one or more of the following:

  • 5 years as a Millwright or equivalent
  • 5 years experience working in an industrial environment conducting mechanical repairs
  • 5 years experience conducting mechanical repairs in a shipyard setting
  • 5 years experience conducting mechanical repairs in a Wastewater Treatment Plant setting
  • 5 years experience conducting maintenance in an Oil refinery
  • 5 years experience conducting maintenance in a Power Generation Plant
  • National Institute of Metal working skills (NIMS) certification
  • Certified Industrial Maintenance Mechanic (CIMM)


CPR and first aid certification 


Tech Savvy-  Anticipating and adopting innovations in business building digital and technology applications.
Demonstrates Self-Awareness- Using a combination of feedback and reflection to gain productive insight into personal strengths and weaknesses.

Application and Selection Process: Application materials will be screened for clarity, completeness including online application, resume, and responsiveness to the list of qualifications, skills, and abilities. The most competitive candidates may be invited to participate in one or more panel interviews. Applications without the following required materials may not be considered for this position.

  • King County Application
  • Resume
  • Responses to supplemental questions
For more information regarding this recruitment, please contact:

Dan Sherman
Human Resource Analyst  

Supplemental Information

Forbes named King County as one of Washington State's best employers.

Together, with leadership and our employees, we're changing the way government delivers service and winning national recognition as a model of excellence. Are you ready to make a difference?  dedicated to serving one of the nation's best places to live, work and play.

Guided by our , we are making King County a welcoming community where every person can thrive. We value diversity, inclusion and belonging in our workplace and workforce. To reach this goal we are committed to workforce equity. Equitable recruiting, support, and retention is how we will obtain the highest quality workforce in our region; a workforce that shares and will help advance our guiding principles - we are one team; we solve problems; we focus on the customer; we drive for results; we are racially just; we respect all people; we lead the way; and we are responsible stewards. We encourage people of all backgrounds and identities to apply, including Native American and people of color, immigrants, refugees, women, LGBTQ+, people living with disabilities, and veterans.

King County is an Equal Employment Opportunity (EEO) Employer

No person is unlawfully excluded from employment opportunities based on race, color, religion, national origin, sex (including gender identity, sexual orientation and pregnancy), age, genetic information, disability, veteran status, or other protected class. 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.

To Apply

If you are interested in pursuing this position, please follow the application instructions carefully. If you need this announcement in an alternate language or format, would like to request accommodation or assistance in the application or assessment process or if you have questions please contact the recruiter listed on this job announcement.