This position is responsible for supporting daily operations involving heating, ventilation, air conditioning, refrigeration, BAS/DDC controls, chillers, boilers, CRAC units, cooling towers, pumps, air handlers, compressors, and associated mechanical infrastructure. The HVAC Technician supports a secure federal facilities Operations & Maintenance (O&M) program by performing HVAC preventive maintenance, troubleshooting, repair, installation, and service call response activities within a mission-critical facilities environment in Northern Virginia.