The Heating, Ventilation, and Air-Conditioning (HVAC) Mechanic operates, maintains, calibrates, troubleshoots, repairs, programs, and balances real property HVAC equipment and facility-related control systems at CMI’s customer site in Omaha, Nebraska.Key Job FunctionsSupport continuous, safe, efficient, and reliable operation of mission-critical facilities, including primary HVAC systems serving communications and server rooms, Computer Room Air Conditioning (CRAC) units, associated ductwork, controls, and water-treatment components.Operate, inspect, maintain, calibrate, troubleshoot, repair, program, and balance HVAC equipment and facility-related control systems in accordance with manufacturer requirements, applicable Unified Facilities Criteria, ASHRAE standards, and approved maintenance procedures.Maintain mission-critical HVAC systems, including primary units serving communications and server rooms and all Computer Room Air Conditioning (CRAC) units, to support continuous facility readiness and required critical-system availability.Perform predictive, preventive, corrective, and emergency maintenance; respond to priority work orders; mitigate equipment failures; and support root-cause analyses for emergencies, repeated failures, and major repairs.Inspect, clean, repair, insulate, and balance ductwork; fabricate and install duct sections and HVAC components using approved hand tools, portable metalworking tools, and welding or joining equipment as qualified.Install, service, and replace compressors, condensers, evaporators, motors, valves, piping, tubing, filters, belts, fittings, controls, thermostats, switches, fuses, and related electrical components within authorized trade scope.Recover, charge, and handle refrigerants in compliance with EPA Section 608 requirements; test systems for pressure, vacuum, and leaks; and submit required refrigerant reports whenever refrigerant is added, recovered, or lost.Winterize air-handling equipment as required to prevent coil freezing and support semiannual testing of the Collective Protection System.Maintain Direct Digital Control (DDC), Energy Management Control System (EMCS), and Building Management System (BMS) functions, including schedules, set points, setbacks, backups, alarms, trending data, and control calibration.Support HVAC water-treatment and corrosion-control activities through inspections, sampling, chemical treatment, minor remediation, and monthly documentation of water analysis, chemical usage, and corrective actions.Use NexGen IT/TRIRIGA or the Government-designated work management system to receive and update work orders, record labor and materials, document as-found and as-left conditions, enter cause-and-remedy notes, identify deficiencies, and request follow-on corrective work.Maintain accurate equipment, calibration, maintenance, warranty, and condition records; assist with physical asset inventories, preventive-maintenance task lists, and lifecycle condition assessments.Read and work from as-built drawings, blueprints, engineering specifications, manufacturer manuals, control diagrams, shop sketches, and verbal or written work instructions.Follow lockout/tagout, confined-space, fall-protection, refrigerant-safety, electrical/arc-flash, personal protective equipment, hazardous-material, and other applicable OSHA, Air Force, and site safety requirements.Coordinate planned outages and work affecting controlled or HEMP-protected areas; do not disturb HEMP shield components, specialized points of entry, filters, seals, waveguides, or penetrations; immediately report potential damage or configuration concerns.Maintain clean and orderly mechanical rooms, protect Government property, restore work areas after maintenance, and provide professional customer service while coordinating with Government representatives and other contractors.Support 24/7 mission-essential operations, emergency response, after-hours callout, and continuity during holidays, base closures, emergencies, or Government shutdowns as directed.
