Keenan Johnston
Mount Sterling
Summary
Results-driven diesel technician and team leader with progressive experience advancing from entry-level yard laborer to Lead Technician within four years. Strong background in heavy-duty truck maintenance, advanced diagnostics, and repair operations. Proven leadership abilities, effective communication skills, and a commitment to safety, efficiency, and team development. Seeking to leverage technical expertise and leadership experience into a Maintenance Supervisor role.
Overview
5
5
years of professional experience
Work History
Lead Technician (Tech 1)
Penske Truck Leasing
08.2025 - Current
- Lead and support a team of technicians in daily maintenance and repair operations
- Assist in workflow coordination, job prioritization, and maintaining shop productivity
- Provide technical guidance and troubleshooting support on complex mechanical and electrical issues
- Ensure repairs meet safety standards and company procedures
- Mentor junior technicians and support skill development across the team
Technician 1
Penske Truck Leasing
09.2024 - 08.2025
- Performed advanced diagnostics and heavy repairs on diesel trucks and fleet equipment
- Completed repairs including turbos, injectors, wiring systems, EGR coolers/valves, and one-box systems
- Utilized OEM diagnostic software to troubleshoot and resolve complex engine and emissions issues
- Managed exhaust stream and emissions system repairs
Technician 2
Penske Truck Leasing
06.2023 - 09.2024
- Conducted repairs including brakes, tires, lighting systems, wheel seals, and DPF replacements
- Diagnosed check engine lights and performed necessary corrective actions
- Maintained high standards of quality and safety in all repair work
Technician 3
Penske Truck Leasing
03.2022 - 06.2023
- Performed preventative maintenance (PM) inspections on fleet vehicles
- Completed light mechanical repairs and assisted senior technicians
- Maintained accurate service records and inspection documentation
Yard Laborer / Vehicle Maintenance
Paul Peterson Company
03.2021 - 03.2022
- Supported yard operations and performed basic vehicle maintenance tasks
- Assisted with inspections, upkeep, and general fleet readiness
- Maintained a clean and organized work environment
Education
Diesel Technology Training -
American Diesel Tech School
07-2021
High School Diploma - undefined
Bishop Ready High School
01-2021
Skills
- Leadership & Team Development
- Communication & Coordination
- Advanced Diesel Diagnostics
- Electrical Systems Troubleshooting
- Heavy-Duty Repairs (Turbos, Injectors, EGR Systems)
- Brake & Suspension Systems
- Exhaust Stream & Emissions Systems
- OEM Diagnostic Software
- Preventative Maintenance Programs
- Transmission Diagnostics
ADDITIONAL STRENGTHS
- Rapid career progression demonstrating strong work ethic and technical ability
- Ability to lead by example and maintain high performance standards
- Strong problem-solving skills in high-pressure environments
- Committed to continuous improvement and career advancement into leadership roles
Timeline
Lead Technician (Tech 1)
Penske Truck Leasing
08.2025 - Current
Technician 1
Penske Truck Leasing
09.2024 - 08.2025
Technician 2
Penske Truck Leasing
06.2023 - 09.2024
Technician 3
Penske Truck Leasing
03.2022 - 06.2023
Yard Laborer / Vehicle Maintenance
Paul Peterson Company
03.2021 - 03.2022
High School Diploma - undefined
Bishop Ready High School
Diesel Technology Training -
American Diesel Tech School