Summary
Overview
Work history
Education
Skills
Languages
Affiliations
Accomplishments
Timeline
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Marvin Lorenzana

Marvin Lorenzana

ABU ,UAE

Summary

Experienced operation and maintenance expert with extensive expertise in refrigeration systems, preventive and predictive maintenance, and ventilation control. Demonstrates proficiency in leak detection, control circuit testing, and the installation of air conditioning units. Skilled in technical reporting and adept at using Maximo system, Excel, and Word for efficient work documentation. Committed to environmental awareness and safety with hazardous materials training and defensive driving certification. A dedicated team player with a strong focus on routine maintenance, system diagnostics, and enhancing operational efficiency through VFDs knowledge. Career goals include advancing expertise in industrial refrigeration systems while contributing to sustainable practices.

Experienced technician with focus on HVAC systems, offering solid foundation in installation, maintenance, and troubleshooting. Capable of enhancing energy efficiency and system performance through precise diagnostics and skilled repairs. Committed to delivering reliable climate control solutions and ensuring optimal operational standards.

Overview

12
12
years of professional experience

Work history

Sr. HVAC technician

Enova by viola
Abu Dhabi, UAE
02.2025 - Current
  • Project site: Abu Dhabi international airport power complex
  • Maintaining 1500tr water cold chiller York
  • Maintaining 900tr air cooled chiller carrier
  • Daily routine check
  • Daily Preventive maintenance for HVAC and chiller system, pump motor with 110kwt base on PPM from Maximo system
  • Dossing of chemical treatment for water cooled condenser to prevent corrosion of condenser.
  • Chemical dossing for chilled water
  • Preventive maintenance of air cooled condenser tower by checking the belt tension greasing of motor and cleaning the condenser
  • Preventive maintenance of water cooled tower by greasing the motor, inspection the belt, and cleaning the evaporative water guard panel
  • Preventive maintenance for all VFD panel
  • Monitoring the parameter reading and make a daily report for both chiller.

HVAC technician

HRH Prince Khaled Bin Sultan Bin Abdul Aziz
Riyad, Saudi Arabia
09.2022 - 10.2024
  • Fulltime electrician and HVAC maintenance for four palace
  • Kitchen maintenance for gas burner, gas oven
  • Maintained HVAC systems for optimal performance.
  • Replacing busted bulb inside and outside palace
  • Making modified garden light for decor
  • Installing additional power outlet
  • Conducting preventive maintenance for garden post light, wall light
  • Conducting preventive maintenance for HVAC when family is absence
  • Driver technician

HVAC technician

Arabian Castle and General Contracting
Dammam, Saudi Arabia
12.2017 - 08.2022
  • Project site. Tabuk royal Saudi air force base
  • Maintained HVAC systems for optimal performance.
  • Maintaining three unit of 120tr royal temp, two unit of 120tr of carrier air cooled chiller and others HVAC system
  • Daily routine check for HVAC system
  • Conducting daily preventive maintenance from computerize maintenance management system (cmms system)
  • We are two technician for one hangar building and with 300 HVAC system
  • Conducting corrective maintenance
  • Troubleshooting for fault alarm appeared in DDC and BMS control room
  • Replaced bearing for condenser motor 75kwt
  • Replaced electrical motors and HVAC systems up to 380 volts after main disconnect.
  • Connected motors and compressors by following schematics.
  • Analyzed, modified and repaired digital control systems.
  • Interpreted blueprints and manuals to install equipment and diagnose faults.
  • Inspected mechanical components to identify issues and determine proper corrective actions.
  • Fully overhauling for semi hermitic compressor 06E carrier
  • Conducted system diagnostics, resulting in efficient troubleshooting of HVAC equipment.
  • Troubleshot technically challenging breakdowns, both in-person and via computer or phone linkups.
  • Improved system efficiency via regular inspections and necessary repairs.
  • Monitored humidity level inside simulation flight dome to ensure all equipment are safe
  • mixing chemical water treatment to the chilled water system to prevent any form of corrosion.

HVACR technician

BR CAT international llc
DAMMAM, Saudi Arabia
05.2015 - 07.2017
  • Project site . Saudi Aramco Site Offices and Aramco accommodation
  • Maintained and serviced HVAC systems and refrigeration equipment.
  • Disassembled units, repaired broken components and restored to operating condition.
  • Completed preventive maintenance on refrigerators and freezers.
  • Restored equipment to operational condition by removing and replacing or repairing components.
  • Installed new split air conditioning as per client request
  • Preventive Maintenance for split A/C, package A/C and window A/C
  • Complying call for non work hours for ac breakdown

HVAC technician

Al Zamil Cool care
Jubail, Saudi Arabia
01.2013 - 02.2015
  • Project site at Saudi petrochemical company for two years
  • Maintaining one 90tr Al Zamil air cooled chiller one 60tr air cooled chiller and others HVAC system
  • Prepared for PPE equipment, verry important the gas detector, before start the day
  • Daily routine check of all HVAC equipment
  • Visiting building management system control room to check any alarm and temperature changes
  • preparing cold work permit
  • proceed to the daily preventive maintenance schedule. for example in task sheet PM for today is two AHU and two Exhaust Fan
  • Prepare material to be needed in PM such as grease gun, degreaser spray, rug, pressure washer, new bag filter size 24 by 24 by 18 and 12 by 24 by 18 , tools, clamp meter.
  • troubleshooting fault alarm for HVAC
  • Conducting corrective
  • Top overhauling for semi hermetic compressor and change new part of any deform
  • Connected motors and compressors by following schematics.
  • Part of corrective is to clean the chilled water supply strainer for AHU.

Education

Higher National Diploma - refrigeration and air condition

southern Isabela college of art and trade
Philippines
07.2009 - 09.2009

Skills

  • Leak detection
  • Preventive and predictive maintenance
  • Refrigeration systems
  • Ventilation control
  • Control circuit testing
  • Pumps, fans and cooling towers
  • Changing compressor, fan motor etc
  • Defensive driving training
  • Technical reporting
  • In-depth knowledge of refrigeration systems
  • Preventive maintenance
  • Defrost controls
  • Industrial refrigeration systems
  • Hazardous materials training
  • Operation and maintenance expert
  • Dedicated team player
  • Routine maintenance
  • Leak checks
  • System diagnostics
  • Environmental awareness
  • VFDs knowledge
  • Overhauling compressor
  • Installation of air conditioning
  • charging refrigerant
  • oxy acitilyn welding, copper , aluminum, brass
  • Work report
  • Maximo system
  • Excel
  • Word
  • Emailing

Languages

English
Fluent

Affiliations

  • hobbit reading and watching you tube related to my work to more enhance my knowledge

Accomplishments

recognition turn over at Petro chemical

Timeline

Sr. HVAC technician

Enova by viola
02.2025 - Current

HVAC technician

HRH Prince Khaled Bin Sultan Bin Abdul Aziz
09.2022 - 10.2024

HVAC technician

Arabian Castle and General Contracting
12.2017 - 08.2022

HVACR technician

BR CAT international llc
05.2015 - 07.2017

HVAC technician

Al Zamil Cool care
01.2013 - 02.2015

Higher National Diploma - refrigeration and air condition

southern Isabela college of art and trade
07.2009 - 09.2009

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Marvin Lorenzana