HVAC Mechanic

Compensation Grade: T19 Salary Range: $35.01-$45.50 Opening Date:
October 2, 2026 Closing Date:
October 17, 2026

Please Note:

All job announcements close at 11:59 p.m. of the day before the posted closing date.

As an HVAC Mechanic, you will be responsible for operating, maintaining, and modifying heating and air-handling equipment to provide efficient operation of HVAC systems within prescribed safety limits and in according with appropriate codes. Your work will ensure the safety and comfort of airport users, staff, and tenants.

HVAC Mechanic Serves in the Utilities Division in the Engineering and Maintenance Department at Washington Dulles International Airport (IAD). Operates, maintains, and repairs heating and air-handling systems and related HVAC equipment ranging from low-pressure boilers to high-temperature hot-water boilers and from small exhaust fans to multi-zoned air-handling units with multi-filtering systems. Also works on air intake fans, mixed-air fans, high-voltage HVAC units used with high-temperature hot-water and chilled water, ventilation units, exhaust fans in manholes, variable air volume boxes, heat pumps which heat or cool air, various pumps and air compressors, diffusers, and ductwork.

Performs related functions.

• Troubleshoots problems with high-pressure boilers and related equipment; performs major repairs, as needed.
• Uses schematics and drawings in rebuilding heat and chilled-water valves and calibrating to manufacturers' specifications.
• Repairs or replaces HVAC equipment and components, including blower motors, timers, switches, electrical controls, and seals.
• Cuts, threads, and replaces or reroutes pipes.
• Installs duct work and diffusers.
• May recommend modification to the design of equipment for improved operations.
• Performs preventive maintenance.
• Responds to trouble calls and troubleshoots malfunctioning HVAC equipment.
• May revise set points on energy management software.
• May operate high-pressure boilers and 2000-ton chillers; makes adjustments as required or takes the unit off line.
• May test water at the pump station for chlorine level; operates pumps and switches water flow from Fairfax County water to reservoir water and vice versa.
• May be assigned as backup for the water testing and treatment program.
• With Air Conditioning Mechanics, maintains or repair thermal ice storage systems, chillers, window air conditioners, water coolers, roof-top heat pumps, and refrigeration equipment.
• Maintains a clean work area and paints equipment.
• Performs other duties as assigned.

• Five years of progressively responsible experience in the repair and maintenance of HVAC systems and equipment.
• Knowledge of the theories and principles of heating and ventilating, and the ability to recognize abnormal conditions and make adjustments or repairs.
• Knowledge of air-conditioning and the mechanical operation of HVAC equipment, and the ability to troubleshoot problems and make adjustments or repairs.
• Knowledge of how HVAC units, return air, and mixed-air fans work together and skill in restoring regulated temperatures in specific areas.
• Skill in using hand and powered tools and equipment of the trade in repairing HVAC systems.
• Ability to analyze data and information (including blueprints and schematics).
• Skill in using energy management software to revise set points for the automatic operation of equipment at new ranges.
• Ability to work safely and knowledge of the safety rules, regulations, and procedures to do so.
• Ability to speak and write effectively.
• Skill in using a computer, computerized work order, and time and attendance system.

• Licensed as a Journey-level HVAC Mechanic.
• Universal Certification (Section 608) to service HVAC/refrigeration…