David Mendoza
Hawthorne
Summary
HVAC and Plant Operations Technician with hands-on experience maintaining commercial and hospital mechanical systems including chillers, boilers, air handlers, and building automation systems. Certified in Tridium Niagara 4 with experience troubleshooting BACnet systems and servicing complex HVAC equipment. Proven ability to work independently, diagnose system issues quickly, and maintain critical infrastructure in high-demand environments.
Overview
9
9
years of professional experience
1
1
Certification
Work History
HVAC & Plant Operations Technician
Englewood Health
Englewood
12.2021 - Current
- Maintain and service hospital HVAC infrastructure including air handlers, steam boilers, chillers, condensers, and DX systems.
- Maintain MRI chillers and glycol systems to ensure reliable cooling for critical equipment.
- Serviced pumps, strainers, and chilled water systems to ensure reliable operation and prevent system failures.
- Repaired and replaced VAV boxes, actuators, motors, and HVAC instrumentation to maintain system integrity and performance.
- Diagnosed and troubleshot issues with Honeywell BACnet building automation systems to ensure optimal system performance.
- Perform repairs on steam piping systems throughout hospital facilities.
- Work independently to diagnose mechanical failures and restore system functionality.
HVAC Service Technician
Thermal Dynamics
Wayne
11.2020 - 12.2021
- Serviced residential and commercial HVAC systems, ensuring optimal performance of furnaces, boilers, rooftop units, and air handlers.
- Performed maintenance and repairs on chillers, compressors, pumps, and refrigeration systems to enhance reliability and efficiency.
- Installed and serviced electric heaters and commercial HVAC units.
- Installed gas piping using threaded black iron pipe.
- Diagnosed equipment failures and replaced faulty mechanical components.
- Guided customers in system operation and smart thermostat setup, improving user experience and comfort.
HVAC Installation Apprentice
Reiner Group Inc
Fair Lawn
06.2017 - 11.2020
- Installed HVAC systems in residential and commercial environments, ensuring optimal performance of air handlers, condensers, boilers, and ductless mini-split systems.
- Fabricated and installed ductwork systems, contributing to effective airflow and system efficiency.
- Installed gas piping and condensate drainage systems.
- Assisted with system startup and testing after installation, verifying system functionality and compliance with safety standards.
- Ensured availability of tools and materials for efficient project execution.
Education
Tridium Niagara 4 TCP Certification -
ThinkTech University
Sydney, Australia02-2026
HVAC/R Basic Refrigeration Certification -
Passaic County Technical Institute
Wayne, NJ05-2017
Skills
- Building automation systems (BAS) and Tridium Niagara 4
- BACnet systems
- Chiller maintenance
- Steam boilers and systems
- Air handlers and VAV systems
- Pumps, motors, and actuators
- Refrigeration systems
- Glycol systems
- HVAC diagnostics and repair
- Black iron gas piping installation
- Electrical and mechanical troubleshooting
- Preventive maintenance programs
- Leadership and team supervision
- Customer service excellence
- Microsoft Office proficiency
- C programming (basic)
- Graphic design using Photoshop
Certification
• Tridium Niagara 4 TCP Certification, ThinkTech University, 2026
• EPA Universal Certification, 2017
• OSHA 30 Certification, 2020
• R410A Certification
• TracPipe CounterStrike & TracPipe PS-II Certification
• EPA Universal Certification, 2017
• OSHA 30 Certification, 2020
• R410A Certification
• TracPipe CounterStrike & TracPipe PS-II Certification
Languages
- English, Fluent
- Spanish, Conversational
Timeline
HVAC & Plant Operations Technician
Englewood Health
12.2021 - Current
HVAC Service Technician
Thermal Dynamics
11.2020 - 12.2021
HVAC Installation Apprentice
Reiner Group Inc
06.2017 - 11.2020
Tridium Niagara 4 TCP Certification -
ThinkTech University
HVAC/R Basic Refrigeration Certification -
Passaic County Technical Institute