Leo Fernandez

• Lead diagnosis, repair, and commissioning for RTUs, split systems, VRF/VRV equipment, chillers, boilers, VAV boxes, and exhaust systems across 30+ commercial sites. • Reduced repeat service calls 22% by standardizing startup checklists, airflow readings, refrigerant diagnostics, and root-cause documentation. • Supervise 2–4 technicians on preventive maintenance and emergency response; maintain OSHA, lockout/tagout, and refrigerant-handling compliance. • Read schematics and sequence-of-operations documents; troubleshoot 24V controls, VFDs, sensors, economizers, and BAS alarms. • Coach customers and facility managers on operating conditions, repair priorities, and energy-saving improvements while closing work orders accurately.

• Installed and serviced commercial rooftop units, package heat pumps, split systems, refrigeration circuits, and gas-fired heating equipment. • Performed preventive maintenance for retail centers, restaurants, offices, and light-industrial facilities, documenting belts, filters, coils, motors, and electrical readings. • Diagnosed compressor, condenser-fan, thermostat, control-board, airflow, and refrigerant leaks using gauges, meters, and manufacturer procedures. • Completed change-outs and tenant-improvement projects safely, coordinating with general contractors and communicating schedules to site contacts. • Earned repeat service assignments by explaining findings clearly and delivering clean, code-compliant repairs.

• Assisted journeymen with installs, preventive maintenance, brazing, leak checks, filter changes, belt replacement, and condenser/evaporator coil cleaning. • Learned safe recovery, evacuation, charging, and refrigerant cylinder handling under EPA-certified supervision. • Used hand tools, meters, ladders, and lifts while following job hazard analyses, PPE requirements, and lockout/tagout procedures. • Maintained parts, tools, service vehicles, and jobsite cleanliness; recorded equipment model numbers and maintenance findings. • Built a strong foundation in electrical fundamentals, airflow measurement, customer service, and commercial HVAC troubleshooting.

Completed hands-on training in HVAC electrical systems, refrigeration cycles, airflow, brazing, controls, heat pumps, rooftop units, safety, and preventive maintenance. EPA Section 608 Universal certification preparation and exam completion.