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HVAC TECHNICIAN I, II, OR III / FACILITIES

St. Charles County
Saint Charles, MO Full Time
POSTED ON 5/22/2026
AVAILABLE BEFORE 7/21/2026

HVAC TECH I

Starting: $42,880,57 - $53,267.79/yr

JOB DESCRIPTION: The purpose of this position is to perform preventative, routine and assist with specialized maintenance duties involving troubleshooting, repair, and/or installation of all heating/cooling, refrigeration, ventilation and building management equipment at all County government facilities.

  • Performs a variety of preventive maintenance activities on a routine basis for a variety of HVAC equipment.
  • Assists with troubleshooting, repairs and installs of HVAC, boiler systems and Refrigeration equipment as well as reviews building systems and controls.
  • Supports diagnosis efforts and monitors building systems operations. This includes troubleshoot diagnostics from heat pumps, rooftops units, boilers, chillers and cooling towers, CAV’s, VAV’s and commercial self-contained units as send from building management system and recommends repairs or replacement.
  • Uses a variety of testing equipment, such as volt/ohm electrical meters, ammeter, refrigerant gauges, leak detectors, psychrometers, manometers, and pneumatic gauges.
  • Uses refrigerant recovery machines, scales and charging systems per EPA requirements. Conducts refrigerant equipment repairs, removal of refrigerant according to EPA regulations, soldering and brazing, leak check, installation and charge.
  • Analyzes chemical treatment of all closed/open, hot/chilled water loops and adjusts as required per system, while adhering to all governmental regulations.
  • References existing schematics, wiring/pneumatic diagrams, blue prints/technical manuals and
  • Researches technical references materials when necessary.
  • Operates grinders, welders and gas cutting/soldering torches to perform metal fabrication tasks.
  • Installs electrical wiring/piping of power and control circuits of all voltages.
  • Calibrating pneumatics systems and operational controls.
  • Adjusts ducts and dampers of various material types.
  • Aligns pumps, motors, belts, pulleys, and sheaves.
  • Maintains, troubleshoots, repairs, and installs electronic, pneumatic, computerized equipment and controls under supervision of senior employees.
  • Documents complete work on maintenance cards, detailing observation, action and recommendations.
  • Use of good oral and written communication skills.
  • This position is part of an On-Call rotation among HVAC staff. Will be required to report to work as needed, outside of normal business hours.
  • May be required to perform all general building maintenance including, but not limited to, snow removal, carpentry, installing troubleshooting and repairing equipment fixtures, computer equipment, doors and locks.

REQUIREMENTS:

  • Education

o. 2-year degree certificate from vocational/technical training in H.V.A.C. from an accredited school required.

o. Associates degree preferred.

  • Certifications

o Certified universal by the EPA in the handling of refrigerants.

o. Must have and maintain a driver’s license and a satisfactory driving record.

  • Job Experience

o. 1-3 years of building maintenance experience.

o. Minimum of 1 year commercial HVAC service and maintenance experience required.

o. Knowledge of building management computer systems required.

o. Trane Tracer SC/ Ensemble experience preferred.o Individuals with building access to areas with confidential data such as MULES/REJIS databases used in law enforcement is required to successfully pass a fingerprint background check and drug test and maintain a clear record throughout employment.

  • Knowledge, skills and abilities

HVAC TECH II

STARTING SALARY: $53,270.40 - $66,174.41/yr

JOB DESCRIPTION: The purpose of this position is to perform preventative, routine and specialized maintenance duties involving troubleshooting, repair, and/or installation of all heating/cooling, refrigeration, ventilation and building management equipment at all County government facilities.

  • Performs a variety of preventive maintenance, troubleshoots, repairs and installs HVAC, boiler systems and Refrigeration equipment as well as building systems and controls.
  • Diagnoses and monitors building systems operations. Troubleshoot diagnostic from heat pumps, rooftops units, boilers, chillers and cooling towers, CAV’s, VAV’s and commercial self-contained units as send from building management system and recommends repairs or replacement.
  • Uses a variety of testing equipment, such as volt/ohm electrical meters, ammeter, refrigerant gauges, leak detectors, psychrometers, manometers, and pneumatic gauges.
  • Uses refrigerant recovery machines, scales and charging systems per EPA requirements. Conducts refrigerant equipment repairs, removal of refrigerant according to EPA regulations, soldering and brazing, leak check, installation and charge.
  • Analyzes chemical treatment of all closed/open, hot/chilled water loops and adjusts as required per system, while adhering to all governmental regulations.
  • Monitors, operates, trouble shoots and repairs building management computer systems and components.
  • References existing schematics, wiring/pneumatic diagrams, blue prints/technical manuals and researches technical references materials when necessary.
  • Operates grinders, welders and gas cutting/soldering torches to perform metal fabrication tasks.
  • Installs electrical wiring/piping of power and control circuits of all voltages.
  • Calibrating pneumatics systems and operational controls.
  • Installs and adjusts ducts and dampers of various material types.
  • Installs and aligns pumps, motors, belts, pulleys, and sheaves.
  • Maintains, troubleshoots, repairs, and installs electronic, pneumatic, computerized equipment and controls.
  • Documents complete work on maintenance cards, detailing observation, action and recommendations.
  • Use of good oral and written communication skills.
  • This position is part of an On-Call rotation among HVAC staff. Will be required to report to work as needed, outside of normal business hours.
  • May be required to perform all general building maintenance including, but not limited to, snow removal, carpentry, installing troubleshooting and repairing equipment fixtures, computer equipment, doors and locks.
  • Performs other duties as assigned.

REQUIREMENTS:

  • Education

o. 2-year degree certificate from vocational/technical training in HVACR from an accredited school required.

o. Associates degree preferred.

  • Certifications

o. Certified universal by the EPA in the handling of refrigerants.

o. Must have and maintain a driver’s license and a satisfactory driving record.

o. Successful completion of Professional Level Certification EPA.

  • Job Experience

o. 3 years of building maintenance experience.

o. Minimum of 3 years commercial HVAC service and maintenance experience required.

o. Advanced knowledge of building management computer systems required.

o. Trane Tracer SC/ Ensemble experience required.o Individuals with building access to areas with confidential data such as MULES/REJIS databases used in law enforcement is required to successfully pass a fingerprint background check and drug test and maintain a clear record throughout employment.

  • Knowledge, skills and abilities

HVAC TECH III

STARTING SALARY: $61,560.61 - $76,472.81/yr

JOB DESCRIPTION: The purpose of this position is to use advanced knowledge and experience to perform preventive, routine and specialized maintenance duties involving troubleshooting, repair, and/or installation of heating, cooling, ventilation, refrigeration, and building automation equipment at County government facilities. Acts as a lead in the absence of the supervisor. The work is performed under the supervision and reports to the HVAC supervisor.

  • Performs a variety of preventive maintenance, troubleshooting, repairs and installs of HVAC building systems and refrigeration equipment as well as building automation systems and controls.
  • Diagnoses and monitors building systems operations. Troubleshoots a variety of equipment such as heat pumps, rooftop units, boilers, chillers and cooling towers, CAV’s, VAV’s, FTU’s and commercial self-contained units. Recommends repairs or replacement.
  • Monitor daily building automation at a variety of County sites. Respond to building automation alerts as needed and perform corrective action. Make recommendations for improvements.
  • Acts in a lead capacity in the absence of the supervisor. Provides technical advice and direction to less experienced personnel.
  • Mentor, train and advise HVAC Technicians I & II regarding maintenance and repair of complex systems.
  • Evaluates special projects, estimates material costs, monitors part supply, obtains quotes and places orders as authorized.
  • Uses refrigerant recovery machines, scales and charging systems per EPA requirements. Conducts refrigerant repairs.
  • References existing schematics, wiring/pneumatic diagrams, blueprints and research technical reference materials when necessary.
  • Uses a variety of specialized equipment. Operates grinders, welders and gas cutting/soldering torches to perform metal fabrication tasks.
  • Installations of electrical wiring/piping of load and control circuits of voltages up to 480.
  • Installations and adjustments of ducts and dampers of various material types.
  • Installations and alignment of pumps, motors, belts, pulleys, and sheaves.
  • Utilize digital work order system (CMMS) to complete work orders, detailing observations, actions, recommendations and labor.
  • Use of good oral and written communication skills.
  • This position is part of an On-Call rotation among HVAC staff. Will be required to report to work as needed, outside of normal business hours.
  • Performs other duties as assigned.
  • This position cannot telecommute.

REQUIREMENTS:

  • Education

o. 2-year degree certificate from vocational/technical training in H.V.A.C. from an accredited school required.

o. Associates degree preferred.

  • Certifications

o. Certified universal by the EPA in the handling of refrigerants.

o. OSHA 10-hour certificate, or complete within 6-months of employment or promotion.

o. Must have and maintain a driver’s license and a satisfactory driving record.

  • Job Experience

o. Minimum of 5 years commercial HVAC service and maintenance experience required.

o. Additional experience in general building maintenance preferred.

o. Advanced knowledge of building automation systems required. Automated Logic experience preferred.

o. Familiar with Microsoft Office (Teams, Word, Excel, etc.).

o. Individuals with building access to areas with confidential data such as MULES/REJIS databases used in law enforcement is required to successfully pass a fingerprint background check and drug test and maintain a clear record throughout employment.

  • Knowledge, Skills and Abilities

This is a full-time, 40 hour per week position which includes a full range of benefits including Paid Time Off, Extended Medical Leave, Holidays, Employee Health, Dental, Life, Disability, Retirement, and Tuition Assistance programs.

Pay: $25.00 - $37.00 per hour

Benefits:

  • 403(b)
  • Dental insurance
  • Employee assistance program
  • Flexible spending account
  • Health insurance
  • Life insurance
  • Paid time off
  • Professional development assistance
  • Referral program
  • Retirement plan
  • Tuition reimbursement
  • Vision insurance

Work Location: In person

Salary : $53,268 - $4,288,057

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