HVAC Service Technician with 20 Years Experience

Ha Van Truong

Clovis, CA ***** 559-***-**** ********@******.***

HVAC Service Technician

Experienced HVAC Service Technician with two decades of hands-on expertise in heating, ventilation, air conditioning, and refrigeration systems. Proficient in electrical, plumbing, and mechanical controls. Ambitious professional with a solid background in the HVAC industry, dedicated to delivering exceptional service. AREAS OF EXPERTISE

Pipping and Brazing Duct Sizing and Design Pumps, Fans, and Cooling Towers Ventilation and Air Conditioning Customer Service Service- Driven Results Interpersonal Skills Compelling Leadership Electrical System Sales and Marketing Strategies Preventative Maintenance Refrigeration Motor Controls Boilers Steam Boiler Hydraulic Systems

EXPERIENCE

HVAC Mechanic IV Stanford Health Care Palo Alto, CA October 2025 – Present

Diagnosed and repaired HVAC failures in specialized spaces such as cold rooms, walk-in boxes, and clinical environments, restoring temperature-critical equipment within urgent timeframes.

Calibrated and maintained manual, automatic, and pneumatic HVAC controls, optimizing performance across variable air volume systems and temperature-sensitive zones.

Conducted system pressure testing, balancing, and airflow calibration to ensure compliance with internal quality standards and California building codes.

Partnered with multi-trade teams during system shutdowns, assisting with critical heating, cooling, and electrical isolation procedures to enable safe and efficient upgrades.

Delivered expert-level brazing, soldering, and welding repairs on copper and steel piping systems supporting chilled water, steam, and refrigerant lines — reducing third-party dependency.

Trained in and applied infection control protocols when working in sterile or patient-adjacent areas, contributing to a safe care environment in compliance with hospital-grade standards.

Generated detailed material requisitions and tool lists for HVAC installations and repairs, streamlining workflow and minimizing project delays due to supply gaps.

Used digital and analog instrumentation to troubleshoot and repair faults in control panels and HVAC relay systems, improving reliability and reducing false alarms.

Participated in root cause analysis reviews for recurring HVAC issues, proposing system redesigns or control adjustments to prevent repeat failures.

Supported the hospital's C-I-CARE values by maintaining a respectful presence in patient areas and minimizing disruptions during service calls.

HVAC Mechanic IV Stanford University Palo Alto, CA June 2024 – October 2025

Promoted from Mechanic III to Mechanic IV based on technical expertise, leadership, and consistent performance, maintaining high-standard HVAC systems across Stanford’s academic and research facilities.

Performed installation, diagnostics, repair, and preventive maintenance on a wide range of HVAC equipment, including chillers, boilers, AHUs, VAV systems, exhaust fans, and cooling towers — ensuring compliance with all applicable codes and safety standards.

Saved the university an estimated 30% in contractor costs by independently troubleshooting and repairing complex HVAC issues, reducing system downtime and increasing reliability.

Executed system upgrades and optimizations on HVAC instrumentation and control systems, resulting in a 15% improvement in energy conservation and overall system performance.

Monitored and adjusted Building Automation Systems (BAS) and digital/pneumatic controls to maintain precise environmental conditions, especially in critical research and clinical spaces.

Increased energy efficiency by 20% through proactive system monitoring, preventative maintenance scheduling, and continuous process improvement.

Ensured compliance with safety and regulatory standards, including ASHRAE guidelines, university protocols, and environmental regulations; passed internal audits with zero issues.

Supported and coordinated large-scale retrofits and equipment replacements, collaborating with engineers, contractors, and in-house teams to ensure smooth execution without disrupting essential operations.

Championed a collaborative team culture by mentoring junior mechanics, leading group projects, and helping transform workflows to increase team efficiency and morale.

Developed and maintained accurate records of work orders, inspections, and system status updates in the CMMS platform to support reporting and long-term asset planning. Supervisor Sub Zero Refrigeration Sanger, CA January 2013 – June 2024

Enhanced customer satisfaction metrics through attentive listening to concerns and implementing suitable resolutions

Effectively prioritized and assigned daily work assignments to align with projected project objectives

Meticulously maintained comprehensive maintenance and repair records to facilitate future service needs as per customer requirements

Implement rigorous quality control measures to ensure optimal performance and efficiency of HVAC systems, adhering to industry standards and regulations.

Service Manager Air Tech Fresno, CA November 2011 – December 2012

Identified and diagnosed HVAC equipment malfunctions, offering expert recommendations and implementing effective remediation solutions.

Disassembled HVAC units, conducted repairs on malfunctioning components, and restored optimal operating conditions to ensure uninterrupted functionality

Utilized leadership responsibilities to oversee and guide subordinate workers effectively within my team Service Manager Art Douglas Fresno, CA September 2009 – November 2011

Maintained detailed maintenance and repair records to facilitate future customer service requirements and ensure comprehensive documentation of equipment history.

Installed, serviced, and repaired refrigeration systems for commercial, residential, and industrial applications, ensuring optimal performance and client satisfaction.

Coordinated assignments and tasks for colleagues to optimize workflow and productivity HVAC Technician Spangle Air Fresno, CA June 2007 – September 2009

Consistently serviced and maintained HVAC systems and refrigeration equipment to ensure uninterrupted operation and client satisfaction.

Dismantled units, rectified faulty components, and reinstated optimal operational conditions

Performed preventative maintenance on heating and air conditioning systems to ensure optimal functionality and longevity.

HVAC Technician Melton Air Fresno, CA December 2004 – June 2007

Installed heating, air conditioning, and ventilation equipment, conducting thorough testing

Collaborated with clients to identify suitable material sources in accordance with project budgets and specific requirements.

Offered HVAC pre-inspection support

Conducted retrofitting and remodeling projects for both commercial and residential buildings

Conducted air flow balance procedures to specific specifications of units

Performed air flow balancing procedures according to unit specifications and industry standards HVAC Technician Mitchell Air Fresno, CA December 2004 – June 2007

Installed, maintained, and repaired commercial refrigeration systems

Cooper to condenser

Cooper to coil

Installed Thermostatic Expansion Valve (TXV) to enhance system efficiency

Initiated system startup procedures to ensure proper functionality and performance EDUCATION & TRAINING

Hoover High School – Fresno, CA

California HVAC Certification – Institute of Technology - Clovis, CA

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