Preston Dunster
Brentwood,CA
Summary
Reliable HVAC Technician experienced in installation and maintenance. Enhanced system efficiency through effective use of diagnostic tools while prioritizing safety and quality standards. Contributed to team success by delivering high-quality service and addressing customer needs.
Overview
3
3
years of professional experience
Work History
Commercial HVAC apprentice Installer
T3 Mechanical
Livermore, California
03.2026 - Current
- Supported installation of HVAC systems alongside experienced technicians, contributing to project success.
- Developed proficiency in interpreting blueprints and technical drawings for effective HVAC system layouts.
- Demonstrated proficiency in reading blueprint plans and wiring diagrams.
- Tested equipment following each install to determine efficiency and proper functionality.
- Ensured tools and equipment were properly maintained for optimal operational efficiency and safety.
Service Technician
Perfect Star Heating Cooling & Electrical
Antioch
06.2025 - 03.2026
- Conducting regular preventative maintenance tasks such as cleaning coils, replacing filters, and checking refrigerant levels to ensure optimal system efficiency
- Utilizing specialized diagnostic tools like multimeters and pressure gauges to troubleshoot and repair mechanical or electrical faults in HVAC systems
- Interacting with customers to explain repair needs, provide accurate cost estimates
- Responding promptly to service calls and addressing emergency repair requests to minimize system downtime and ensure customer satisfaction
- Collaborating with team members to coordinate work schedules, share technical knowledge, and support each other in completing service tasks
- Adhering to safety protocols and industry regulations to maintain a safe work environment and prevent accidents or injuries
- Conducting various repairs to ensure system functionality and customer satisfaction
Electrical Apprentice
Golden electrical services
Livermore
02.2024 - 06.2025
- Interpret blueprints, wiring schematics, and technical diagrams to plan and execute layouts accurately.
- Assist with the installation and assembly of wiring systems, conduits, lighting fixtures, and electrical components in various settings.
- Perform routine preventive maintenance and assist in troubleshooting malfunctions in electrical systems, motors, and controls.
- Adhere to safety protocols, including OSHA standards and the National Electrical Code (NEC), to ensure all work meets legal and safety requirements.
- Prepare work areas by drilling holes, digging trenches for underground installations, and gathering necessary tools and materials.
- Learn and apply technical documentation skills to support electrical projects.
Laborer
W.E. Lyons
Walnut Creek
05.2023 - 12.2023
- Operated heavy equipment to handle materials
- Utilized a variety of power tools
- Conducted site preparation and clean up
- Operated multiple power tools for various tasks
- Coordinated with general contractors and foremen
- Ensured efficient site organization and cleanliness
Education
High school diploma -
Liberty high school
Brentwood, CASkills
- HVAC
- Electrical installation
- EPA 608 Universal certified
- Mechanical Knowledge
- Teamwork
- Reliable
- ET card
Timeline
Commercial HVAC apprentice Installer
T3 Mechanical
03.2026 - Current
Service Technician
Perfect Star Heating Cooling & Electrical
06.2025 - 03.2026
Electrical Apprentice
Golden electrical services
02.2024 - 06.2025
Laborer
W.E. Lyons
05.2023 - 12.2023
High school diploma -
Liberty high school