Heavy Duty Equipment Mechanic

King County; Seattle (WA); On-site; USD 70,000 - 100,000; Full time

Benefits offered by this job

Tool allowance

ASE certification pay

Boot allowance

Medical/dental/vision

Free transportation options

Employee assistance program

Paid vacation and sick leave

12 holidays + 2 personal days

Retirement benefits

Job summary

King County seeks a Heavy-Duty Equipment Mechanic to diagnose and repair gas, diesel, and hybrid equipment across fleet assets. You will troubleshoot electrical and hydraulic systems, perform welding and fabrication, and maintain thorough service records.

Field support and shop-based work require safe operation and adherence to county procedures. The role demands independent work and teamwork, with opportunities to guide apprentices and coordinate with multiple divisions.

Qualifications

• Demonstrated journey-level proficiency with industrial/heavy-duty equipment and hydraulics.
• Experience with gas, diesel, and hybrid engines; electrical and transmission systems.
• Knowledge of shop safety rules and repair terminology.

Responsibilities

• Diagnose and repair gas, diesel, and hybrid powered equipment including trucks, backhoes, and loaders.

Skills

Heavy-duty equipment

Troubleshooting

Diagnostics

Safety rules

Independent working

Team mentorship

Microsoft Office

Tools

Electrical test equipment

Electronic diagnostic tooling

Welding & fabrication tools

Job description

Join the team that keeps King County running. As a Heavy-Duty Equipment Mechanic, you’ll be the hands behind the machines that build, maintain, and support vital county operations. From advanced electrical systems to heavy construction equipment, your work ensures crews across the region can do their jobs safely and effectively. Your expertise will directly support the essential services that millions of residents rely on every day.

Why King County is a great place to work?

This is a fantastic opportunity to have a lasting and rewarding career in County government. You will have the opportunity to work in an organization that embraces diversity, institutes best management practices, values hard work, and empowers employees to innovate and strives for second-to-none customer service.

We’re committed to supporting a healthy work–life balance and providing benefits that truly make a difference, including:

• $1,000 annual tool allowance
• Up to $2.88 per hour in additional pay for ASE certifications
• $375 annual boot allowance
• Excellent, competitive medical, dental, and vision coverage
• Free transportation options
• Robust employee assistance program for personal and professional support
• Generous paid vacation and sick leave
• Twelve paid holidays plus two personal holidays
• Retirement benefits through the Washington State Department of Retirement Systems, plus a 457(b) deferred-compensation plan
• And so much more

ABOUT FLEET SERVICES DIVISION

The Fleet Services Division manages King County’s portfolio of vehicles and equipment. The team performs acquisition, maintenance, repair, replacement, and disposal of approximately 3,000 fleet assets for the County’s services associated with the Sheriff’s Office, Public Health, Roads, Parks, Wastewater, Water and Land Resources, and other agencies. The division manages two maintenance shops which include robust storerooms of automotive parts, materials, and construction supplies as well as several technicians working in the field to support remote customer sites.

In addition, the Fleet Division is responsible for the disposition of the county’s personal property assets, which includes a surplus warehouse in Georgetown. Disposal methods can include re-use within the county, donation to verified and approved non-profits, and sales through online portals or sealed/negotiated bids.

The mission of the Fleet Services Team is providing exceptional customer service in the delivery of equitable, sustainable, and dependable fleet solutions.

To learn more about Fleet, please visit our website at: Fleet Services Division - King County, Washington.

SCOPE OF JOB DUTIES:

• Diagnose and repair all types of gas, diesel, and hybrid powered equipment, including, but not limited to, automobiles, heavy/light trucks, tractors, backhoes, street sweepers, wheel loaders, various off-road equipment, and trailers.
• Troubleshoot and repair emergency response vehicle radios, light bars, and security device systems.
• Perform gas and electric welding and fabrication on mobile and stationary equipment.
• Operate mechanical and electronic testing equipment to troubleshoot and repair systems.
• Maintain service, maintenance, and repair records.
• Modify and fabricate stock equipment to meet County needs.
• Repair and maintain shop tools and machinery.
• Provide technical assistance, direction, and advice to other workers, and give guidance on complex mechanical repair projects.
• Interpret equipment repair manuals, electric and hydraulic schematics and illustrated parts diagrams.
• Safely perform repairs in the field during inclement weather.

We are looking for candidates who:

• Demonstratejourney - levelproficiency to work with industrial and heavy-duty equipment, hydraulic, powertrain, diesel and gasoline fuel, accessory and cooling systems.
• Have knowledge of industrial and heavy equipment shop safety rules, procedures, and equipment. Understand technical terms used in light and heavy equipment repairs.
• Are skilled in the use of electrical, electronic, hydraulic and mechanical test equipment and devices.
• Are skilled in troubleshootingand repairing gas, diesel, and hybrid engines; transmissions; diesel fuel and engine-management systems; electrical systems, and radio, light bar, and security device systems.
• Can diagnose and repair pneumatic systems, chassis systems, power-train systems and hydraulic systems.
• Understand how to use diagnostic tools online or paper maintenance, repair and parts manuals to assist in maintenance and repair.
• Are able safely operate vehicles and equipment with onboard systems to test and troubleshoot for proper operation of integral or installed systems before and after maintenance.
• Work independently and in a team environment. Are comfortable providing coaching, mentorship, and oversight to apprentices to perform technical tasks.
• Can navigate office productivity software and operate and perform research on a computer. (The County uses Microsoft Office products including Word, Excel, and PowerPoint.)

Necessary Requirements:

• Possess and maintain a valid Washington State Driver License and Commercial Driver's License (CDL):Able to obtain and maintain a Class B Commercial Driver's License (CDL) with Class N and Air Brake Endorsement is preferred and current Medical Card within 6 months of hire.
• Pass a pre-employment physical and drug screen:If you are a current CDL holder, as required by federal regulations, you must submit to drug testing and test negative for presence of controlled substances; sign a Consent Form for release of Information for each employer for the past three (3) years; and successfully pass a background check for Alcohol and Controlled Substances testing, and a CDL background information.
• Posses tools and equipment:The County provides employees with a tool allowance. The successful candidate must submit a complete tool inventory prior to start date. Candidate who does not have a complete tool inventory will be provided with a temporary tool inventorythat remain County property and must be returned to the County. Heavy Duty Mechanic tool kit's consisting of standard and metric, open end and socket wrenches including: Open end wrenches: Standard size 1/4" through 1-1/4", Metric Size: 6mm through 20mm Socket sets: 1/4" 3/8" 1/2"drive, standard size: 1/4" through 1-1/4", Metric Size: 6mm through 20mm. Various pliers, screwdrivers and other hand tools required to perform the essential functions of the job. Air operated power tools to 1/2" impact gun.
• FIRST AID/CPR CERTIFICATION:The selected candidate must obtain First Aid and CPR certifications within 6 months of hire. This training is available from King County and may be completed during hours of employment.

Typical work schedule:

This position is subject to the provisions of the Fair Labor Standards Act (FLSA) and is eligible overtime. The typical work schedule for these positions is 40 hours per week, Monday through Friday. Our shop operates from 5am to 5pm to best serve our customers. Alternative schedules may be required to meet business needs. Additionally, mandatory overtime and weekend work during emergencies may be required.

Union membership:

This position will be represented by Local 289 of the International Association of Machinists and Aerospace Workers.

Are you ready to apply?

The recruitment for this position is open to all qualified applicants. A completed King County Application is required. We highly recommend that you also provide a cover letter and resume, however, cover letters and/or resumes are not accepted in lieu of a completed application. Applications and/or Supplemental Questionnaires that state "see my resume" or "see my personnel file" are considered incomplete and will not be accepted.

If you have any questions, please contact Karina Cordova, Human Resource Analyst, by e‑mail at [e-mail] or by phone at 206-848-0395. This recruitment is an effort to fill our immediate vacancies as well as create a hire list that will be used for any positions that become vacant within the next 6 months, including additional Term‑Limited Temporary (TLT), Short‑Term Temporary (STT) and Career Service (CS) positions.

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 Karina Cordova, Human Resource Analyst, by e‑mail at [e-mail]

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.