HVAC Mechanic - DLA

Nemean Solutions, headquartered in Sierra Vista, AZ, is a certified SBA 8(a) Native Hawaiian Organization (NHO) and veteran-operated company providing advanced Military Intelligence, Enterprise and Cloud IT services, Cybersecurity, Special Operations Forces (SOF) Exercise and Training, and niche Program Support and Professional Services to Federal and State Agencies supporting the US Government Defense, Intelligence and Aerospace sectors.

Job Overview:

The HVAC Mechanic installs, operates, maintains, troubleshoots, and repairs heating, ventilation, air-conditioning, and refrigeration equipment at Defense Supply Center Columbus. The position performs preventive and corrective maintenance to keep facility systems safe, efficient, reliable, and fully operational in accordance with work orders, manufacturer guidance, ASHRAE standards, OSHA requirements, applicable codes, and contract requirements.

Support Hours: Applicant shall be available during core work hours as established the Government customer.

Essential Duties & Responsibilities:

• Install, service, troubleshoot, and repair environmental-control systems in offices, facilities, and other assigned buildings.
• Perform preventive and corrective maintenance on chillers, cooling towers, air-handling units, dampers, VAV boxes, condensers, pumps, valves, fans, unit heaters, boilers, heat exchangers, humidifiers, dehumidifiers, fan coils, DX systems, heat pumps, window units, ice machines, coolers, refrigerators, freezers, and related controls.
• Mount compressors and condensers; fabricate, assemble, and install ductwork, chassis parts, evaporator units, tubing, and piping using applicable hand, power, metalworking, threading, and welding tools.
• Cut, bend, thread, join, and solder tubing or piping and install expansion, discharge, and other valves to complete refrigerant circuits.
• Connect motors, compressors, temperature and humidity controls, ventilation fans, control panels, filters, and related components.
• Charge and recover refrigerants, observe pressure and vacuum gauges, adjust controls, and test joints and connections for leaks in accordance with EPA requirements.
• Diagnose equipment failures and replace or repair defective controls, thermostats, switches, fuses, wiring, motors, compressors, and other components.
• Perform scheduled inspections, operational checks, seasonal start-up and shutdown, winterization, freeze-protection, and return-to-service activities.
• Inspect natural-gas appliance connections and support required maintenance in accordance with NFPA 54 and applicable safety standards when assigned.
• Operate systems efficiently, report abnormal temperatures, pressures, alarms, leaks, or other adverse conditions, and support energy-conservation requirements.
• Complete work orders, refrigerant records, maintenance logs, equipment updates, and other required documentation accurately and on time.
• Follow lockout/tagout, hazard-control, PPE, Activity Hazard Analysis, work-area protection, cleanup, and Government-property requirements.

Competencies:

• Commercial and industrial HVAC and refrigeration troubleshooting.
• Refrigeration theory, refrigerant handling, and leak detection.
• Electrical controls, motors, compressors, and control panels.
• Piping, tubing, soldering, brazing, ductwork, and mechanical assembly.
• Preventive maintenance and root-cause diagnosis.
• Accurate work-order and refrigerant documentation.
• Safety compliance, customer service, teamwork, and reliability.