MACK MAJOR
Frisco
Summary
Experienced maintenance technician with 3+ years of direct HVAC/R hands-on work, including servicing air-cooled/water-cooled systems up to 10 tons, ammonia/glycol refrigeration, and troubleshooting cooling equipment. Hold Universal EPA Certification (Types I, II, III) and HVAC/Refrigeration training from Lindsey-Cooper School. Proven in industrial electrical/mechanical troubleshooting, pneumatics, and controls from roles in aerospace, automotive, and food manufacturing. Seeking to leverage transferable skills in diagnostics, safety protocols, and system repairs to transition into an HVAC/R technician role, contributing to efficient operations and minimal downtime. Authorized to work in the US for any employer; willing to relocate anywhere.
Overview
28
28
years of professional experience
1
1
Certification
Work History
Senior Field Service Industrial Maintenance Tech
R&E Automated Systems
Various US cities
09.2022 - Current
- Provided electrical/mechanical support in manufacturing plants, including troubleshooting HVAC-related systems like pneumatic air lines, regulators, solenoid valves, and controls cabinets (24V–480V 3-phase).
- Installed/wired electrical panels, profinet cables, and precision instruments using schematics; maintained hydraulic presses, VFD drives, sensors, and 480V motors, transferable to HVAC diagnostics and repairs.
- Key projects: Supported SpaceX robot cells with wiring and pneumatics; repaired weld robots and CNC machines at Volvo, BorgWarner, and Schneider Electric; minimized downtime during strikes at Metalsa and Clarios by fixing hoists, presses, and overhead doors.
- Used CMMS for preventive maintenance; troubleshot PLCs, safety relays, and control circuits in food (Nature's Bakery) and auto plants, aligning with refrigeration/HVAC system upkeep.
Electro-Mechanical Maintenance Technician
Pioneer Frozen Foods
Duncanville
09.2019 - 08.2022
- Serviced, troubleshot, and maintained heating/cooling equipment, including air-cooled/water-cooled systems up to 10 tons, air handlers, pumps, cooling towers, spot coolers, and electric/gas heaters, ensuring smooth production with minimal downtime.
- Gained experience with ammonia/glycol refrigeration systems, replacing/servicing valves, isolating lines, and working on large spiral freezers.
- Broke down and set up production lines/equipment (e.g., ovens, pumps, conveyors, palletizers), applying mechanical/electrical repairs and chemical/sensory checks.
- Monitored inventories, programmed formulas, and conducted audits to meet OSHA guidelines; assisted vendors on repairs and supported cross-departmental maintenance.
- Performed product/machinery tests for performance, reducing breakdowns in high-volume food manufacturing.
Maintenance Mechanic
Nixon Medical
New Castle
12.2018 - 07.2019
- Troubleshot and repaired production equipment, including conveyor systems, pneumatic lines/hoses/actuators, proximity switches, sensors, and mechanical components (bearings, gears, chains), skills directly applicable to HVAC maintenance.
- Minimized downtime with emergency repairs and scheduled preventive maintenance using eMaint CMMS; adhered to OSHA 10 and 5S Lean Six Sigma standards.
- Identified potential issues proactively, supporting facility upkeep and safety.
Electrician
Major And Major Electric, INC
Atlanta
01.2000 - 08.2018
- Installed, diagnosed, and repaired electrical systems/components (e.g., breaker boxes, circuits, lighting, conduits); troubleshot residential AC units up to 2 tons, including service disconnects, whips, furnaces, and thermostat wires.
- Managed projects, pulled permits, coordinated inspections, and ensured code compliance for residential/commercial/industrial clients.
- Oversaw operations, provided customer service, and handled complaints, achieving high satisfaction.
Maintenance Supervisor
Staff Force
Houston
03.2013 - 04.2014
- Supervised maintenance in plastics manufacturing, rebuilding pumps/motors/valves and rewiring electrical components; assigned duties and trained staff, reducing downtime.
- Troubleshot electrical/mechanical issues in mixers/ovens, preparing reports for production manager—skills transferable to HVAC team leadership.
Maintenance Mechanic
QVC
West Chester
02.2012 - 03.2013
- Performed routine/preventive maintenance on HVAC-related systems, including Liebert CRAC units, York chillers, boilers, pumps, condensers, air handlers, VFDs, and motors.
- Maintained uninterrupted power during outages via generators/switchgear; replaced motors in CRAC units, cleared condensation lines, and inspected mechanical/electrical systems.
- Logged inspections, wrote reports, and handled minor repairs (e.g., electrical circuits, light bulbs/ballasts), ensuring compliance in high-security data centers.
Gas Turbine Systems Technician (Mechanical)
United States Navy
07.1997 - 12.1999
- Maintained/repaired gas turbine engines and auxiliary systems, including pumps, air compressors, dehydrators, valves, and fuel/water systems.
- Tested oils/fuels, adjusted switches/sensors, and performed preventive maintenance; trained personnel and ensured safe operations.
Education
Associate of Science - Advanced Automation
DeVry University
Online01-2026
Certificate - Level 1 & 2 Allen Bradley ControlLogix-5000 & RS-L
Key Automation Training
Atlanta, GA10-2024
Certificate - HVAC/R; Universal EPA; Ammonia/Glycol
Lindsey-Cooper Refrigeration School
Irving, TX05-2023
Skills
HVAC/R-Specific:
- Refrigeration (Ammonia/Glycol Systems)
- HVAC/R Repairs & Troubleshooting
- Boilers, Chillers, Air Handlers, Cooling Towers
- EPA Universal Certification (Types I, II, III)
- Pneumatics & Hydraulics
Electrical/Mechanical:
- Electrical Troubleshooting (10 years)
- High/Low Voltage (5 years)
- Programmable Logic Controllers (PLCs)
- Schematics & Blueprint Reading
- Preventive Maintenance & Root Cause Analysis
Tools/Software:
- CMMS (eMaint)
- Microsoft Office/Excel/Word
- Robot Programming (FANUC/Allen Bradley)
- Precision Measuring Instruments (Calipers, Micrometers)
Professional/Soft Skills:
- Leadership & Mentoring
- Project Management
- OSHA 10 & Safety Protocols
- Customer Service
- Time Management & Process Improvement
Certification
- HVAC-Refrigeration Certification (Lindsey-Cooper, 2023)
- EPA Universal Certification (2023)
- EPA Refrigeration Certification (2023)
- Allen Bradley PLC Maintenance and Troubleshooting (2023)
- FANUC Handling Tool Operation and Programming (2024)
- Level 1 & 2 Allen Bradley ControlLogix-5000 & RS-Logix 500 (2024)
- OSHA 10
- Driver's License (Non-CDL Class C)
- Electrician Apprentice
- Stationary Engineer's License
- Additional: Advanced Controls Methods, PLC Programming, Data Acquisition Strategies (Present)
Timeline
Senior Field Service Industrial Maintenance Tech
R&E Automated Systems
09.2022 - Current
Electro-Mechanical Maintenance Technician
Pioneer Frozen Foods
09.2019 - 08.2022
Maintenance Mechanic
Nixon Medical
12.2018 - 07.2019
Maintenance Supervisor
Staff Force
03.2013 - 04.2014
Maintenance Mechanic
QVC
02.2012 - 03.2013
Electrician
Major And Major Electric, INC
01.2000 - 08.2018
Gas Turbine Systems Technician (Mechanical)
United States Navy
07.1997 - 12.1999
Associate of Science - Advanced Automation
DeVry University
Certificate - Level 1 & 2 Allen Bradley ControlLogix-5000 & RS-L
Key Automation Training
Certificate - HVAC/R; Universal EPA; Ammonia/Glycol
Lindsey-Cooper Refrigeration School