Machining & Maintenance Worker III

Oakland, CA posted on July 20



Under general supervision, performs a variety of mechanical maintenance and repair work on water treatment and distribution plant equipment in the shop and in field locations; learns to set up and operate various machine tools; and performs related work as required. 


Machining and Maintenance Worker I/II/III and Maintenance Machinist are alternately staffed. Individuals are expected to advance from the Machining and Maintenance Worker I level up through the journey level Maintenance Machinist within 48 months by achieving the trade specific skills, knowledge, abilities and applicable licenses and certifications contained in the Maintenance Trades Training Program for Maintenance Machinists. This classification series is distinguished by assignments that develop a combination of mechanical maintenance and precision machining skills. 

Machining and Maintenance Worker III is the skilled sub-journey classification in this series. Individuals in this class perform more specialized mechanical maintenance and repair and machine tool operations requiring greater skill, more precision, and a higher degree of trade knowledge with greater independence of action. 


  1. Observes, learns to perform, and assists Maintenance Machinists and Machining and Maintenance Worker III's in a variety of basic mechanical inspection, preventive maintenance, and repair of pumps, valves, conveyors, cranes, meters, and related mechanical equipment including pump alignments and in-shop balancing; assists in preparing and placing concrete bases for pumps and motors; assists in performing millwright-type work in the field. 
  2. Observes, learns to perform, and assists in maintaining and repairing water heaters, lavatory fixtures, and related equipment including threading, soldering, and installing plumbing fittings and connections; assists in fabricating and installing flexible, rigid and high pressure piping. 
  3. Observes, learns to perform, and assists in sheet metal work including assembling and installing ducting, fabricating, and pop riveting; learns basic oxyacetylene, MIG, and ARC welding techniques. 
  4. Observes, Learns to perform, and assists in the disassembly, cleaning, lubrication, and reassembly of hydraulic and pneumatic valves and regulators; 
  5. Assists in preparing work site for service and ensures that materials and tools are clean, properly located on the job or in the shop area in preparation for scheduled repair work; helps keep the shop area generally clean and orderly; cleans up work area after job is completed. 
  6. Learns to set up where necessary and to use a variety of hand and power tools, gauges, and measuring and testing instruments common to the mechanical maintenance trades such as cutting torches, impact wrenches, band saws, pipe threading machines, taps and dies, drill presses, grinders, lathes, milling machines, scales, micrometers, dial indicators, and vernier callipers. 
  7. Learns and applies proper shop and field safety practices and procedures; completes the District Safety Academy and other assigned courses. 
  8. Learns to interpret and work from mechanical drawings, designs, and sketches. 
  9. Keeps simple shop or field records; makes oral or written reports of supplies, material, or equipment used and of work performed; may obtain parts and materials from vendors. 
  10. May work in sumps or deep pits while assisting in the maintenance of pumps and screening equipment. 
  11. Performs routine preventive maintenance on shop equipment and portable tools. 
  12. Learns to perform more difficult assignments and to use more specialized mechanical maintenance tools and equipment. 
  13. Maintains, repairs, and installs industrial pumps, motors, bearings, valves, hydraulic controls of various types, regulators, rate control valves, and allied piping systems; sets up and performs precision balancing of rotating elements for pumps, motors, and blowers and field balances pump units as required. 
  14. Disassembles, cleans, repairs, adjusts, calibrates, reassembles, and tests mechanical equipment, pneumatic tools, water meters, pumps, valves, and other hydraulic measuring equipment. 
  15. Fabricates parts and fittings using gas and electric welding equipment; makes assemblies and repairs units used in maintenance work from work orders, mechanical drawings, specifications, sketches, and verbal instructions. 
  16. Learns more advanced ARC welding and TIG welding techniques and equipment usage; may sharpen, temper, straighten, and heat treat steel; performs precision machining work using lathes, milling machines, drilling presses, and grinders. 
  17. Operates, modifies, and maintains heating, ventilating, and air conditioning equipment. 
  18. Sets up and operates rigging equipment to move or place heavy items in repair and installation work. 
  19. May plan a job including making rough estimates of labor, materials, and supplies required for the performance of specific assignments and preparing sketches of the work to be performed. 
  20. Directs and participates in the OJT of lower level Machining and Maintenance Workers as assigned; ensures that proper safety precautions are observed. 
  21. May operate the central tool room including dispensing tools, inventory control, tool repair, and tool demonstration and testing. 


Knowledges, Skills and Abilities 

General Knowledge of: The identification and use of standard stationary, hand and power tools and the materials, terms, practices and equipment common to mechanical trades; arithmetic and mechanical principles related to shop and field work. 

Skill in: Keeping standard records and making verbal reports of work performed; demonstrating manual dexterity. 

Ability to: Learn to read and interpret mechanical blueprints and shop drawings, specifications, and diagrams; learn to use a variety of equipment and tools common to mechanical maintenance and machining including lathes, mills, drill presses, grinders, and related measuring tools; learn the proper and safe use of oxyacetylene welding equipment; learn to perform work which requires considerable manipulative skills, mechanical comprehension, accurate use of shop mathematics, and logical reasoning; use some independent judgment and initiative in applying basic mechanical maintenance and repair tasks; acquire increased job knowledge and skills; understand and carry out verbal and written instructions; learn and apply safe work practices; establish and maintain effective working relationships. 

Working Knowledge of: The methods, practices, procedures and tools common to routine and general mechanical maintenance and machining of equipment and components systems in water treatment and distribution facilities; principles and techniques used in preventive maintenance inspection and general repair of pumps, motors, valves and hydrants, regulators, valve compressors, hydraulic systems, and related mechanical components; safety precautions pertaining to the work. 

Skill in: Use of common hand, power, and machine tools and materials, terms, practices, and equipment common to mechanical maintenance and machining; interpreting and working from mechanical drawings, blueprints, specifications and service and repair manuals; using standard measuring devices. 

Ability to: Learn to perform the full range of preventive and corrective repair and overhaul of water treatment and distribution mechanical equipment including diagnostic and troubleshooting techniques; use specialized tools of the trade including MIG and ARC welding equipment. 

(In addition to the above) 

Working Knowledge of: The methods, practices, procedures, and tools used in completing major repairs, maintenance, and overhaul of mechanical equipment and component systems in water treatment and distribution facilities such as pumps, valves, and pneumatic and hydraulic systems; the proper use of general mechanical repair and metal working tools and equipment; safety precautions pertaining to the work; shop mathematics 

General Knowledge of: The use, operation and maintenance of mechanical equipment; metal fabrication and ductwork used in Heating Ventilation and Air Conditioning systems; methods and tools used in plumbing installation and repair; proper use of lubricants. 

Skill in: Using the standard hand and power tools and measuring devices of the trade; keeping accurate maintenance records and making sketches and layouts; reading and interpreting mechanical drawings and specifications. 

Ability to: Learn to perform skilled preventive maintenance and repair on industrial pumps, motors, bearings, valves, hydraulic controls of various types, regulators, rate control valves, conveyors, chemical feed systems, gas dispensing devices, and allied water treatment and distribution piping systems; perform complex machine tool, metal work, and millwright-type work involving the use of specialized tools, instruments, and equipment rigging; learn to diagnose unusual and undesirable operating conditions in mechanical equipment; learn TIG welding techniques; direct the work of an assistant; establish 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 indicated above. 

Typical ways of acquiring these knowledges, skills and abilities are: 

Completion of the twelfth grade, or its equivalent, and eighteen months of experience equivalent to the District's Machining and Maintenance Worker II, which has included satisfactory completion of the OJT, vocational school, and self-study courses specified in the District's Maintenance Trades Training Program for Maintenance Machinists. 


Must possess physical characteristics to perform the critical and important duties of the job, including but not limited to sufficient strength to lift and pull manhole covers weighing up to 100 pounds; lift a 90 pound pavement breaker; climb ladders to get on top of reservoirs; and sufficient stamina to perform strenuous work for an extended period of time. Must be willing to work outdoors in a variety of weather conditions and work overtime as needed. May be required to be clean-shaven as required in order to wear respiratory protection equipment. 


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 trainingprograms to attract qualified diverse student graduates for EBMUD jobs.

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EBMUD values our 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 12 days vacation and 13 holidays plus 2 floating holidays.