Summary
Overview
Work History
Education
Skills
Certifications And Additional Skills
Timeline
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MARIO BARRIENTOS

Grand Prairie

Summary

Diesel Technician with 3+ years of experience in diagnostics, repair, and preventative maintenance in high-volume shop environments. Skilled in mechanical and electrical troubleshooting, inspections, and safety compliance. Experience supporting braking, suspension, and air systems on heavy equipment. Known for strong work ethic, efficiency, and maintaining equipment uptime. Seeking to transition into trailer and fleet maintenance with a focus on inspections, repair, and reliability.

Overview

3
3
years of professional experience

Work History

Diesel Technician (Level 2)

Holt CAT
Irving
01.2024 - Current
  • Perform diagnostics, preventative maintenance, and repairs on diesel engines and heavy equipment in a fast-paced shop environment
  • Troubleshoot mechanical and electrical systems using diagnostic tools, schematics, and service manuals
  • Assist with inspections and repairs involving braking, suspension, and air systems
  • Complete work orders accurately and efficiently to maintain equipment uptime and reliability
  • Maintain a clean, safe, and organized work environment in compliance with OSHA standards
  • Support and assist junior technicians and interns with troubleshooting and repair procedures

Diesel Technician Intern

Holt CAT
Irving
01.2023 - 07.2024
  • Assisted senior technicians with inspections, preventative maintenance, and repairs on diesel equipment
  • Gained hands-on experience with mechanical systems, electrical diagnostics, and shop operations
  • Followed safety procedures and contributed to overall shop productivity and workflow

Education

Diesel Technology Certification -

Dallas College

Automotive & Diesel Technology Program -

Dubiski Career High School

Skills

  • Diesel Engine Diagnostics & Repair
  • Preventative Maintenance & Inspections
  • Mechanical & Electrical Troubleshooting
  • Air Brake & Suspension Systems
  • Electrical Systems & Wiring
  • Steering & Suspension Systems
  • Diagnostic Tools & Shop Equipment
  • Shop Safety & OSHA Compliance
  • Engine rebuild

Certifications And Additional Skills

  • OSHA Safety Training
  • Bilingual: English & Spanish
  • Strong Teamwork & Communication
  • Customer Service Experience
  • Holt U
  • Smith System Driver

Timeline

Diesel Technician (Level 2)

Holt CAT
01.2024 - Current

Diesel Technician Intern

Holt CAT
01.2023 - 07.2024

Diesel Technology Certification -

Dallas College

Automotive & Diesel Technology Program -

Dubiski Career High School
MARIO BARRIENTOS