Diego Roybal
Safford,AZ
Summary
Seasoned Heavy Duty Diesel Technician , adept in machine diagnostics and problem-solving, with a proven track record of enhancing equipment reliability and workplace safety. Excelled in mechanical troubleshooting and customer service, ensuring zero safety incidents and fostering strong client relationships. Detail-oriented professional with proven knowledge of inspections, safety assessments, and repair actions.
Overview
9
9
years of professional experience
1
1
Certification
Work History
Mechanic
City of Safford
06.2025 - Current
- Inspected and tested equipment to locate worn and damaged parts.
- Replaced damaged, missing, or defective parts with new and refurbished components.
- Performed diagnostic and troubleshooting procedures to find and identify root causes of mechanical issues.
- Performed preventative maintenance oil changes and brake jobs to preserve performance and reliability of vehicles.
- Maintained a safe working environment at all times by adhering to company guidelines and OSHA regulations, reducing workplace accidents.
- Improved vehicle performance by conducting thorough inspections and identifying necessary repairs.
- Maintained accurate records of completed work orders, ensuring transparency for customers and management alike.
- Upheld quality control standards for all completed work, ensuring each vehicle left the shop operating at peak performance.
Heavy Duty Diesel Technician
Empire Southwest LLC
08.2022 - 06.2025
- Performed preventive maintenance checks in accordance with caterpillar specifications.
- Repaired or replaced defective parts on all types of heavy-duty trucks and support equipment.
- Identified potential problems before they caused major damage by regularly inspecting equipment for signs of wear or malfunctioning components.
- Determined equipment condition by conducting inspections and diagnostic tests.
- Diagnosed and repaired electrical systems, fuel systems, cooling systems, power steering and brakes.
- Performed preventive maintenance on diesel engines, including oil changes, lubrication and filter replacements.
- Maintained accurate records of labor performed on equipment in order to provide an accurate invoice for customers.
- Kept abreast of the latest cat developments through attending training and classes.
- Developed strong mechanical skills while working closely with experienced technicians in a team environment.
- Serviced air conditioning, heating and engine-cooling systems.
- Built relationships with customers by providing excellent customer service during interactions at various locations onsite.
- Dismantled engines to remove worn out components for rebuilding or replacement and being shipped back to mesa with all cores being sealed corretly.
- Evaluated warranty requests and conducted parts evaluation for required services.
Firefighter
City of Safford
05.2020 - 03.2025
- Performed life-saving procedures during medical emergencies, administering CPR and first aid as needed.
- Responded to emergency medical calls to perform lifesaving procedures and other emergency medical services.
- Collaborated with fellow firefighters to execute efficient firefighting strategies, mitigating property damage and loss of life.
- Operated fire hoses, hydrants and extinguishers to eliminate fire and prevent from spreading.
- Demonstrated strong leadership skills while serving as a mentor to new firefighters, fostering a culture of teamwork and professionalism within the department.
- Maintained optimal readiness for emergency situations by regularly participating in drills and training exercises.
- Improved operational efficiency by helping maintain apparatuses, equipment, and facilities according to established standards.
- Utilized technical expertise in operating specialized firefighting equipment such as aerial ladders, hydraulic extrication tools, and thermal imaging cameras.
- Participated in physical fitness and training programs to maintain preparedness and stamina for fire rescues.
- Educated the local community on fire safety practices through presentations at schools, businesses, and other public venues.
- Assisted in wildfire suppression efforts by coordinating with local, state, and federal agencies to establish containment lines and protect threatened structures.
- Enhanced overall departmental performance by attending professional development courses and conferences, sharing acquired knowledge with colleagues upon return.
- Reduced risk of fire spread in wildland areas by executing controlled burn procedures.
- Laid and connected hoses, held nozzles and directed water streams as part of fire suppression activities at active scenes.
- Maintained close contact with dispatch to receive and share information about current fires, equipment movements, and incoming personnel.
- Reduced property damage from fires with quick and strategic firefighting tactics.
Heavy Duty Diesel Diagnostic Mechanic
Freeport McMoRan
05.2016 - 08.2022
- Inspected brake systems, steered mechanisms and any other major components to ensure that they were in proper operating condition.
- Repaired exhaust emissions devices on tier 4 interim and tier 5 final.
- Disassembled engines, pump suspensions, torque converters, beds, transmissions, finals, and differential units.
- Maintained and promote a safe work environment with no write-ups, reworks or safety incidents.
- Inspected brake systems, steering mechanisms, transmissions, engines, and other parts of Equipment.
- Installed new radiators, water pumps, ignition systems, starters and alternators as needed.
- Diagnosed mechanical problems and determined the best course of action to repair machines.
- Documented services and repairs on work orders.
- Repaired and replaced worn or defective parts using hand tools, power tools, and precision measuring instruments.
- Followed all safety protocols while performing repairs in accordance with company standards.
- Conducted routine inspections to identify potential issues before they became major repairs.
- Assisted in training junior mechanics as needed in order to increase overall team productivity.
Education
Business Management -
Pima Community College
Tucson, AZEmergency Medical Technician - Emergency Medicine
Eastern Arizona College
Thatcher, AZ05.2021
High School Diploma -
Morenci High School
Morenci, AZ05.2015
Skills
- Problem-Solving
- Truck operations and support equipment repairs
- Steering systems
- Equipment and Machinery Lubrication
- Engine diagnostics
- Attention to Detail
- Workplace Safety
- Equipment Inspection
- Parts Ordering
- Reliability
- Turbocharger Repair
- Excellent Communication
- Hydraulic Repair
- Vehicle repairs
- Critical Thinking
- Service Documentation
- Welding and fabrication
- Mechanical Troubleshooting
- Completing task and deadlines in a safe and efficient time frame
- First aid certified
- Emergency response
- Firefighting
- Search and rescue techniques
- Emergency medical response
- Radio communication proficiency
- Fireground communications
- Map reading and navigation
- Fire containment
- Fire hose deployment
- Fire behavior analysis
- Triaging
- Wildland firefighting
Certification
- 3500 Engine Tune Certification
- Mobile Air Conditioning Society Worldwide Certification 1234yf
- Medical Examination Certificate / Can obtain CDL if needed
- Emergency Medical Technician Certification
- CPR and AED Certification
- Multiple certificates from Arizona state fire school
Timeline
Mechanic
City of Safford
06.2025 - Current
Heavy Duty Diesel Technician
Empire Southwest LLC
08.2022 - 06.2025
Firefighter
City of Safford
05.2020 - 03.2025
Heavy Duty Diesel Diagnostic Mechanic
Freeport McMoRan
05.2016 - 08.2022
Business Management -
Pima Community College
High School Diploma -
Morenci High School
Emergency Medical Technician - Emergency Medicine
Eastern Arizona College