The Metropolitan Water District of Southern California

Job Details

Job Summary


The MWD's Water System Operations Group, Operations Support Services Section, Power & Equipment Reliability Unit currently has one (1) opening for an Operations & Maintenance Technician IV (HVAC) in the HVAC & Facility Maintenance Team at our Weymouth Water Treatment Plant in La Verne, CA.

This journey-level HVAC maintenance position is responsible for the following: repair, maintain, modify and install a wide variety of air conditioning, heating, ventilation, and refrigeration systems and equipment throughout the District. Troubleshooting to include electrical and electronics on HVAC and refrigeration systems; perform refrigerant recovery, brazing, system evacuation and charging; leak checking and testing of air conditioning, heating and refrigeration systems; design and fabrication of minor sheet metal work projects. Perform duties under minimum supervision.

The Operations & Maintenance Technician IV (HVAC) utilizes journey level mechanical/electrical skills, experience and knowledge in the practices, procedures, and methods of installing, improving, diagnosing, repairing and maintaining, both general and complex heating, ventilation and air conditioning systems.

Maintains and improves a variety of systems including air distribution systems and machinery, heat exchangers, furnaces, hot/cold deck systems, and pneumatic, digital, VAV controls and energy management systems related to Metropolitan’s buildings and facilities systems. Supports the operational core of water and power reliability by effectively maintaining and improving the quality of working and operating environments within treatment plants, ozone plants, conveyance and distribution buildings including shops, offices, occupied and unoccupied structures including communication sites and computer rooms, as well as commercial/industrial systems.

Provides operational reliability, quality, capacity and energy efficiency of HVAC systems and output through a mix of general and advanced preventive and corrective maintenance skills to effectively meet or exceed customer expectations.

Job Duties
1. Performs preventive and corrective maintenance on a variety of commercial/industrial HVAC equipment, component parts and/or auxiliary units, including pneumatic, digital, VAV controls and energy management systems, electrical, and electronic controls to ensure working and operational environments necessary for effective facility use.

2. Troubleshoots HVAC problems and determines appropriate corrective action to eliminate equipment malfunctions and ensure effective HVAC service, output, and minimize equipment down time.

3. Effectively completes PM, CM and improvements on HVAC equipment such as various refrigerant systems including pneumatic control compressors, pumps, boilers, cooling towers, fan coils, evaporative coolers, louvers, dampers, filters, pneumatic controls, electrical, and electronic controls, blowers, solenoids, and thermostats.

4. Designs, fabricates and installs sheet metal ducting systems and registers to provide ongoing and necessary working and operating environmental aspects.

5. Performs PM, CM, and improvements on commercial/industrial equipment and systems such as chillers, walk-in refrigerator/freezers to maintain proper equipment operating conditions.

6. Operates heating and air conditioning equipment or auxiliary units according to manuals, directions, specifications or diagnostic indicators to provide HVAC output at desired and acceptable levels.

7. Reads, interprets, and takes the appropriate follow-up steps when monitoring equipment performance readings including energy usage information, control signaling and feedback, as well as a variety of system output measurements.

8. Designs and/or installs new or rebuilt HVAC systems and equipment and perform initial start-up procedures to place into operation, including quality checks of various gauges and instruments, as well as ensure the equipment and systems have the proper levels of power, water, lubricants, refrigerants, and air pressure needed for effective start-up and operation.

9. Provides effective preventive maintenance on a wide range of equipment of varied age, including PM of consumable parts such as filters, belts, fluids and chemicals.

10. Performs electrical and electronic diagnosis, repairs and installation related to HVAC systems such as replacing relays, programmable logic controllers, circuit boards, varied controls, as well as energy conservation related systems to ensure effective operation and equipment life.

11. Identifies, fabricates and procures parts needed to effectively complete PM, CM tasks associated with HVAC systems.

Education and Experience:
• High school diploma or Certificate of High School Equivalency with a minimum of 6 years’ experience, one year of which must be in commercial/industrial HVAC.

• High school diploma or Certificate of High School Equivalency and attainment of journey level skills through a recognized HVAC trade training program and/or applicable related experience within an industrial environment.

Experience and knowledge as demonstrated by practical application of general and advanced techniques and practices specific to the inspection, diagnosis, repair and maintenance of HVAC and refrigeration equipment. Skills necessary include mechanical, pneumatic, electrical, welding (brazing) and electronics.

Required Knowledge of: Commercial/industrial theories, practices, tools and materials for the maintenance and repair of heating, ventilation, air conditioning and refrigeration systems, plumbing, electricity, electronics and mechanical, sheet metal fabrication, welding, water and lubricant analysis as it applies to the operation and maintenance of HVAC mechanical/electrical systems, controls and equipment, refrigerant recovery and recycling requirements of the Environmental Protection Agency (USEPA) to ensure safe and effective handling of toxic substances to ensure environmental compliance, chemicals associated with parts and HVAC system cleaning such as coil cleaners and solvents, safe operating techniques and the occupational hazards of motorized or pneumatic equipment operation, and electrically energized HVAC components, and safety practices and regulations for maintaining and repairing HVAC equipment.

Required Skills and Abilities to: Diagnose malfunctions of HVAC equipment and systems (visually and/or aurally). Ability to use, operate, and troubleshoot system problems through HVAC computerized systems, including equipment and building comfort automation systems, read, interpret and develop sketches, diagrams, manufacturers’ manuals, and specifications to complete installations and repair of complex HVAC systems, use and maintain electrical/mechanical tools and equipment normally and traditionally utilized in HVAC operation and maintenance, apply and guide others in adhering to safety practices and regulations for inspecting, maintaining, repairing HVAC equipment.

Certificates, Licenses and Registrations Requirements
• Valid Driver’s license from state of residency equivalent to a California Class C (Must have at time of application).

• EPA Certification to handle refrigerants (CFR 40 part 82, subpart F) (three parts—1,2, as a minimum, or universal). (Must have at time of application).


Expectations of Hours of Service, Emergency and Stand-by Service:
Employees in this position may be required to work off-shift hours and/or stand-by service to address operational needs and emergencies as required. May be required to work extended periods away from the normal reporting location.

Physical Demands:
Heavy tasks may require lifting and carrying items weighing up to 50 pounds, with intermittent need to lift and carry materials and/or equipment weighing up to 100 pounds with assistance. Frequently requires pushing, pulling, turning and positioning parts, assemblies, equipment and tools weighing as much as 100 pounds with assistance. May be required to lift and move heavy items with the assistance of others and with lifting devices such as jacks, hoists and cranes of varied types and capacities. Physical effort includes frequent walking, stooping, bending, reaching, standing, kneeling and sitting for long periods of time. At times may be required to use respiratory filtration devices.

Work Environment:
Work is performed indoors and outdoors at large pumping, treatment, hydroelectric or control facilities or other assets under all types of conditions, including extreme temperatures, open and confined spaces ranging from crawl spaces to sub-structures as well as varied types of terrains. Job tasks may require working from heights and functioning from lifts, hoists, scaffolds, and cranes over surfaces ranging from earthen materials to concrete, steel and water. Work activity may be frequently conducted in close proximity to exposed, electrically energized equipment including high voltage systems. The work environment frequently involves exposure to equipment and tools producing high levels of noise, as well as potentially dangerous materials and chemicals that require careful adherence to extensive safety precautions, rules and regulations.

Job Related Selection Criteria
50% Technical Skills and Knowledge including:
• Preventive and corrective maintenance and repairs of HVAC and refrigeration systems;
• Operations of Air and Water cooled chiller systems and Boiler systems;
• Pneumatic controls; and
• Energy Management systems
20% Technical Skills / hands on testing
15% Knowledge of safety practices related to the HVAC industry
10% Job Preparation (education, experience and training relevant to the position)
05% Oral Communication Skills
100% Total


• Competitive compensation
• Excellent Medical, Dental, Life, Vision
• Retirement plans including Pension plan and 401k (with matching employer contribution)
• Training and advancement opportunities
• Excellent working environment
• Tuition reimbursement, paid holidays, and more.

This job announcement has been designed to indicate the general nature and level of work being performed by employees in this classification. It is not designed to contain or be interpreted as a comprehensive inventory of all duties, responsibilities and qualifications required of employees assigned to this job. To receive a copy of the complete job description, please send an email to

The Metropolitan Water District of Southern California is committed to providing reasonable accommodations to qualified individuals with disabilities. Qualified individuals with disabilities who need a reasonable accommodation during the application or selection process, please call (213) 217-7738 or email 
MWD is a Federal and State EO employer – Veterans/Disabled and other protected categories.

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