Job Specifications

Class Code:




Date Originated:


Date Revised:

1/82,  4/95, 11/11, 06/20, 03/23



Under general supervision, install, maintain, service, troubleshoot and repair heating, ventilating, air conditioning, refrigeration and related systems; and perform other duties as required.


Building Equipment Mechanic is the journey level mechanic classification. These employees perform the full range of installation, maintenance, and repair activities for the heating, ventilating, air conditioning, and refrigeration systems in a variety of buildings and structures throughout the County.

Senior Building Equipment Mechanic is the advanced journey level mechanic classification. These employees perform installation, maintenance, and repair of the more difficult and complex equipment/systems and perform higher level duties including: diagnose operating problems and system malfunctions; determine parts and equipment needs and prepare job estimates; calibrate, adjust, troubleshoot, replace and repair pneumatic, electronic and electrical control systems; modify the programming of automated control systems as directed; develop and revise operating procedures and instructions; provide information to engineers and contractors regarding the location and characteristics of heating and air conditioning equipment and ducts. Incumbents in this class may be assigned to train and review the work of Building Equipment Mechanics, provide direction on the more difficult assignments, and provide supervision in the absence of the supervisor.


         Install, maintain, service, and repair heating, ventilation, air conditioning, refrigeration and related systems including reciprocating and centrifugal compressors;

         Remove components such as evaporators, condensers or compressors for repair or replacement; exchange power-heads on thermostatic expansion valves or replace the complete valve;

         Evacuate or pump down a system for repair work or to exchange parts and components using EPA approved equipment and procedures;

         Prepare the system for recharging and recharge with refrigerant; change or add oil to compressors;

         Pressure test centrifugal compressors using EPA approved methods to find and stop leaks;

         Repair purge compressors on centrifugal chillers; check settings on pressure controls and re-calibrate;

         Replace inoperative or defective controls; maintain and repair hot water boilers and make adjustments to the air-fuel mixture;

         Service boiler controls to assure automatic operation and flame control; test for, adjust and maintain water treatment chemical levels in heating and cooling water systems and cooling towers;

         Change seals on centrifugal water pumps; calibrate and service control devices for boilers, chillers, heating, air conditioning and refrigeration units;

         Cut and fit various types of piping and tubing; change bearings and motor mounts on electric motors;

         Adjust, service and repair dampers; maintain and repair fans, air handlers, bearings, sheaves, v-belts, and pulleys;

         Check and maintain air distribution systems consisting of ducts, plenums, mixing boxes, dampers and diffusers;

         Maintain gasoline, natural gas and diesel generators;

         Change filters; grease motors; recover refrigerants;

         Replace or repair blower shafts and bearings;

         Use a computer terminal to input and access data;

         Drive light vehicles;

         May direct and supervise maintenance workers and temporary, volunteer and other laborers as needed.



Knowledge of:

Building Equipment Mechanic

Working knowledge of:

Senior Building Equipment Mechanic

Thorough knowledge of the above, plus:

Some knowledge of:

Ability to:

Building Equipment Mechanic

Senior Building Equipment Mechanic

The above, plus:

Education and Experience:

Any combination of training and experience, which would provide the required knowledge and abilities, is qualifying, unless otherwise specified. A typical way to obtain the knowledge and abilities would be:

Building Equipment Mechanic: Two years of experience installing, maintaining, servicing and repairing heating, ventilating, air conditioning, refrigeration and related systems.

Senior Building Equipment Mechanic: Three years of experience installing, maintaining, servicing and repairing heating, ventilating, air conditioning, refrigeration and related systems, at least one year of which must be equivalent in scope and breadth to the Building Equipment Mechanic classification in the County of Santa Cruz.

Special Requirements, Conditions:

License, Certificate: Possession of a valid California class C driver license.

Upon 6 months of employment, must maintain and secure Certification as a Universal Technician by a certifying organization approved by the Environmental Protection Agency as required by section 608 of the Clean Air Act, 1990, as amended, including final regulations, 1993.

Special Working Conditions: Exposure to: variable temperatures and weather conditions; cramped work spaces, such as ventilation ducts and crawl spaces; heights, such as working on roofs and ladders; high noise levels such as the sound of diesel engines and other machinery; dust; the possibility of experiencing burns, electrical hazards, contact with toxic substances and chemical irritants, infections from exhaust streams in correctional/medical settings, bodily injury from moving objects, such as machinery, fans and belts, and working alone in isolated areas.

Other Special Requirements: Availability to work irregular hours, including on-call duty to provide emergency repair of heating, ventilating, air conditioning and refrigeration systems and to repair and maintain County buildings and equipment.


Bargaining Unit: 41

EEOC Job Category: 07

Occupational Grouping: 36

Workers' Comp Code: 1160