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Kai Mendoza

HVAC Technician
Phoenix, AZ, United States

Professional Summary

EPA Section 608 Universal certified HVAC Technician with 7+ years of hands-on experience across commercial rooftop units, VRF systems, and residential heat pumps. Proven diagnostic accuracy cutting callback rates by 18% while managing high-volume service routes up to 10 calls daily. Dedicated to clear customer communication, strict OSHA compliance, and mentoring upcoming technicians.

Employment History

HVAC Technician
Desert Peak Mechanical · Phoenix, AZ
Mar, 2022 · Present
Install, service, and commission light commercial packaged rooftop units (up to 25 tons), variable refrigerant flow (VRF) systems, and dual-fuel residential heat pumps across Phoenix metro area. Manage high-volume daily dispatch completing an average of 8–10 commercial and residential service calls while maintaining a 96% first-time completion rate. Cut repeat service callbacks by ~18% through systematic electrical diagnostics, advanced airflow measurements, and comprehensive refrigerant leak testing. Perform seasonal preventative maintenance, motor replacements, TXV adjustments, and compressor retrofits aligned with manufacturer specifications and local code. Mentor and supervise 2 junior apprentice technicians on diagnostic techniques, brazing protocols, and strict EPA refrigerant recovery compliance.
Junior HVAC Technician
Sunbelt Comfort Solutions · Mesa, AZ
Jun, 2019 · Feb, 2022
Executed residential split-system air conditioning, gas furnace, and heat pump installations and emergency repairs across the East Valley. Conducted heating and cooling load calculations using ACCA Manual J and Manual D guidelines to verify proper equipment sizing and duct airflow. Maintained a 95%+ first-visit resolution rate by carrying core replacement parts and executing methodical circuit and sensor diagnostics. Conducted nitrogen pressure testing, deep vacuum evacuations down to 300 microns, and precision oxy-acetylene pipe brazing. Educated homeowners on smart thermostat operation, seasonal filter schedules, and efficiency improvements, driving high customer satisfaction ratings.
HVAC Helper / Apprentice
Valley Air Partners · Tempe, AZ
Aug, 2017 · May, 2019
Assisted lead technicians with commercial and residential installations, duct fabrication, mastic sealing, and airflow balancing. Recovered refrigerants (R-410A, R-22) under certified supervision adhering strictly to EPA Section 608 environmental guidelines and documentation. Prepared job sites, staged tools and materials, ran copper line sets, and pulled low-voltage thermostat wiring. Conducted basic multimeter voltage, continuity, and resistance checks on motors, relays, and contactors.

Education

AAS in HVAC Technology
GateWay Community College · Phoenix, AZ
Aug, 2015 · May, 2017
Coursework focused on refrigeration cycles, commercial heating, electrical fundamentals, psychrometrics, and Building Automation basics. Graduated with Honors.

Skills

EPA 608 Universal
Rooftop Package Units (RTUs)
Heat Pumps & Dual-Fuel Systems
VRF Systems
ACCA Manual J / Manual D Basics
Brazing & Soldering (Oxy-Acetylene)
Electrical Troubleshooting & Multimeters
Building Automation Basics
Customer Communication & Diagnostics
OSHA Safety Compliance & PPE

Courses

EPA Section 608 Universal Certification
Esco Institute / EPA
2017
Universal license permitting service and maintenance on Type I, Type II, and Type III low- and high-pressure refrigeration systems.
OSHA 10-Hour Construction Safety
OSHA Training Institute
2018 · 2018
Comprehensive job-site hazard recognition, electrical safety, personal protective equipment (PPE), and fall protection protocols.