Plant Maintenance Mechanic

Oakland, CA posted on July 20



Under general supervision, installs, maintains, adjusts, and repairs mechanical equipment used in a large municipal wastewater treatment plant; and performs related work as required.


This is the Journey level classification in this series. This classification is distinguished from the Plant Mechanical Maintenance Supervisor in that the Plant Mechanical Maintenance Supervisor is responsible for planning and directing the day-to-day activities of Plant Maintenance Mechanics and other workers. 


  1. Repairs, maintains, installs, and adjusts a variety of wastewater treatment plant facilities to include chemical feed and processing equipment; belt, chain, and screw conveyors; sluice gates, compressors, and scrapers; air conditioning, heating, and ventilating equipment; oxygen-production and distribution equipment; electric oil-hydraul1c elevators; mechanical, structural, and plumbing apparatus; and diesel engines and related co-generation equipment. 
  2. Fabricates parts and fittings; makes assemblies and repairs units used in maintenance work from work orders, drawings, specifications, sketches, and verbal instructions. 
  3. Uses hand and power tools such as drill and hydraulic presses, Jacks, grinders, power saws, pipe threaders and bending machines. 
  4. Uses precision measur1ng instruments such as height and depth gauges, calipers, verniers, and micrometers of various types. 
  5. Uses gas and arc weld1ng equipment in cutting, forming, joining, building-up metal, and fabricating parts. 
  6. 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. 
  7. Makes rough estimates of labor and materials necessary for performance of the work; keeps records and makes reports of work performed. 
  8. Directs the work of one or more assistants; instructs them in proper work procedures and safety precautions. 
  9. Makes sketches of work to be performed or of work completed. 
  10. Works underground in sewers, channels, or other structures to remove obstructions or make repairs. 
  11. Maintains boilers, freon-type air conditioners, and heating equipment. 
  12. May perform the simpler hand tasks of a blacksmith such as forging, sharpening, tempering, and straightening. 
  13. May perform routine carpentry and painting work on plant equipment and facilities. 


Knowledges, Skills, and Abilities 

Thorough Knowledge of: The standard methods. practices, materials, tools and equipment used in the installatlon, adjustment, maintenance, and repair of mechanical equipment common to a wastewater treatment plant, and of safety regulations and practices pertaining to the work, including precautions in handling and storing liquid chlorine and oxygen. 

Working Knowledge of: The functions and capabilities of common machine tools; metal fabrication techniques and the working properties of common metals and alloys; the uses and operation of arc welding and gas cutting and welding equipment; rigging principles and techniques; and shop mathematics. 

General Knowledge of: Diesel engines and related co-generation equipment, and methods and procedures of the carpentry and painting trades. 

Skill in: Reading and interpreting mechanical drawings, plans, and specifications; making rough sketches; estimating labor and materials for proposed work; diagnosing defects in a variety of mechanical equipment common to a wastewater utility. 

Ability to: Keep records and make reports of work progress; instruct and direct subjourney-level personnel; and establ1sh and maintain effective working relationships. 

Education and Experience: Any combination of education and experience that has led to the acquisition of the knowledges, skills, and abilities as indlcated above. 

Typical ways of acquiring these knowledges, skills, and abilities are: Completion of the twelfth grade, or its equivalent and either: 

l) Eighteen months' experience comparable to the Dlstrict's Plant Malntenance Worker III classification, including satisfactory completion of the appropriate courses and advanced on-the-job training as specified in the District's Trades Training Program; or, 

2) Attainment of recognized journey level status as a Maintenance Mechanic, Maintenance Machinist, or Millwright with work experience primarily in maintenance repair rather than limited to production machine tool operations. 


Must possess physical characteristics to perform the critical and important duties of the class, including working in tight spaces, in tunnels, and at heights up to 85 feet. Must be clean shaven at all times as required to wear respiratory protection equipment. Must be willing to work outdoors in a variety of weather conditions and work overtime as needed. 


Must possess a valid California driver's license and have a satisfactory driving record.


EBMUD is an equal opportunity employer and strongly encourages qualified women, minorities, veterans and individuals with disabilities to apply for job opportunities.

EBMUD staff maintains ongoing partnerships with local community college skilled trades training programs to attract qualified diverse student graduates for EBMUD jobs.

Interested applicants should follow the instructions on how to register for upcoming job opportunities and proceed to create an applicant profile. Once this job is officially open for applications, you may actively apply through the Jobs page on and click the“Jobs” link on the upper right side of the main page. Click on “Job Resources”, then the “Job Descriptions and Salary Information” link, and review jobs that you think you would be interested in. Click on “Email me when jobs like this become available” and fill out an online job interest card. Use the search function to help you find specific EBMUD job titles.


Go to our website, to see current openings for which you can apply. Only online applications are accepted for EBMUD jobs, and applications are only accepted when EBMUD posts an opening for a job.


This study guide can help entry level applicants prepare for EBMUD's written test with tips, examples of concepts that are covered and sample problems.
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EBMUD values its employees and maintains competitive pay and benefits, provides meaningful and challenging work, maintains a safe, well-equipped workplace, uses current technologies, encourages innovation, implements organizational practices that value employee contributions, encourage learning, and promote employee wellness and work/life balance. EBMUD full-time employees are eligible for fully paid Kaiser medical coverage, Delta Dental Plan, Vision Service Plan, Flexible Spending Account and Retirement plan. EBMUD will reimburse employees 100% of tuition and textbook cost upon satisfactory completion of an approved course to the maximum amount of $3,500 per fiscal year. EBMUD provides employees with 12 days of vacation and 13 holidays, plus 2 floating holidays annually.