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The County of DuPage
Wheaton, Illinois

Job Details for 3145c - Stationary Engineer II – Heating/Refrigeration Mechanic

Job Description

UNION: Local 399

Under general supervision; performs work of considerable difficulty in the operation, maintenance and repair of the Power Plant, tunnel, and County owned or leased facilities; performs work of moderate difficulty in maintaining the heating, ventilation and air conditioning (HVAC) and refrigeration equipment up to 150 tons in County buildings; performs related work as required.

An employee in this class is assigned duties which require independent actions, are recurring in nature and are carried out according to standard practices and general work instructions while performing skilled work in the installation, repair and maintenance of HVAC and refrigeration equipment; coordinating related work completed by contractors. Assignments are verbal or written and may include sketches, layouts or blue prints. General supervision is received for work in progress and at the end of a shift from a Facilities Manager or Facilities Supervisor.

The list of duties and responsibilities is illustrative only, and is not a comprehensive listing of all the duties and responsibilities performed by positions in this class.

• Operates, maintains and repairs all Power Plant, tunnel, and County owned or leased facilities, and related equipment (e.g. high temperature and high pressure hot water generators, high and low pressure steam boilers, centrifugal and absorption chillers, air conditioning units, high voltage electrical distribution and emergency electric power generators, air compressors, heat exchangers, pressure vessels, pumping systems, air handlers, vacuum and circulating pumps, hot water systems, circulating and ventilating fans, water softeners, steam traps, and other mechanical, steam, pneumatically or electrically powered equipment).
• Performs power plant stationary engineer duties as required.
• Maintains and repairs various types of mechanical equipment of the HVAC system, such as feed pumps, vacuum pumps, circulating pumps, air compressors, refrigeration compressors, condensers, evaporators, hot water generators, circulating and ventilating fans, and similar mechanical, steam or electrically operated equipment.
• Maintains and repairs various types of standalone refrigerated equipment throughout the County facilities, such as refrigerators, cooler, and walk-in coolers.
• Completes preventive maintenance and emergency work orders.
• Maintains records of work performed.
• Performs scheduled preventive maintenance and cleaning of equipment.
• Conducts preventative maintenance and checks operation for proper functioning of equipment.
• Maintains inventory and recommends ordering of stock and materials to supervisor
• Provides assistance to other labor trades classifications.
• Completes estimates of time and materials to complete projects.
• Provides response to facilities’ work order requests.
• Power plant assignments on a rotating basis or as needed for coverage
• Maintains regular attendance and punctuality.

• Adjusts work assignments and schedules in the event of an emergency to participate in emergency preparedness, response, and recovery activities as assigned.
• Depending on assignment may maintain required emergency management training, licensure and/or certifications.
• Performs related duties as required or assigned within job classification.

To perform this job successfully, an individual must be able to perform each essential duty satisfactorily. The requirements listed below are representative of the knowledge, skill, and /or ability required. Reasonable accommodations may be made to enable individuals with disabilities to perform essential functions.

Knowledge of:
• Methods, materials, tools and practices used in operating and maintaining the Power Plant, tunnel, and County facilities, and related equipment
• Occupational hazards and safety precautions
• Methods and practices used in the maintenance and repair of plant and facilities equipment
• Computers and related software as applied to preventive maintenance and work orders

Skill in:
• Operating, maintaining, troubleshooting and repairing of Power Plant and facilities’ related equipment
• Preparing and maintaining accurate logs, records, and reports
• Following and enforcing necessary safety precautions

Ability to:
• Deal effectively with others
• Verbal and/or written communications


Four years experience as a licensed Stationary Engineer; operating, repairing and maintaining high pressure vessels and related equipment, and completion of an Associate’s degree in HVAC and Refrigeration and four years of experience installing, operating, repairing and maintaining heating, ventilation and refrigeration equipment; or an equivalent combination of training and experience.

The physical demands described here are representative of those that must be met by an employee to successfully perform the essential functions of the job. Reasonable accommodations may be made to enable individuals with disabilities to perform the essential functions.

While performing the duties of this job, the employee is regularly required to stand, walk, use hands, arms, and feet to push, pull and operate tools and equipment, climb, crouch, stoop, crawl and lift, carry and handle up to 50 lbs.

The work environment characteristics described here are representative of those an employee encounters while performing the essential functions of this job. Reasonable accommodations may be made to enable individuals with disabilities to perform the essential functions.

The work environment for this position frequently includes working near moving mechanical parts, in precarious places, with fumes or airborne particles, in cramped or confined spaces, and with potential hazards high temperature hot water/steam, chemicals, refrigerant, and low temperature walk-in refrigerators.

Licensed as a registered Stationary Engineer by the City of Chicago or other equivalent license; valid Illinois’ driver’s license, and a chlorofluorocarbon (CFC) certification for refrigeration assignment.