Summary
Overview
Work History
Education
Skills
Timeline
Generic

JOHN JENKINS

Oklahoma City,OK

Summary

Heavy-duty truck technician with extensive experience servicing Peterbilt, Freightliner, Volvo, and International vehicles. Proven expertise in diesel engine teardown and rebuilds, including in-frame and out-of-frame overhauls and troubleshooting. Skilled with 24V Cummins, 6.7L Cummins, ISX15 Cummins, Detroit Diesel Series 60, and DD15 engines. Committed to safe, dependable repairs that minimize downtime.

I have extensive experience working on Peterbilt, Freightliner, Volvo, and International trucks. While I consider myself a well-rounded technician with experience across many systems of a truck, my strongest area of expertise is diesel engine teardown, and rebuilding, including in and out of frame rebuilds/overhauls. My experience includes the 24v, cummins, 6.7L Cummins, ISX15 Cummins, Detroit Diesel Series 60, and Detroit DD15 engines.

My experience extends well beyond over-the-road trucks. I have significant experience working as a heavy equipment technician on equipment including skid steers, mini excavators, bulldozers, excavators, front-end loaders, telehandlers, generators, scissor lifts, and aerial lifts. I also have experience working on fire apparatus. While working for a leading E-ONE dealership in Oklahoma City, I gained experience servicing fire trucks, including pumps, PTO systems, gearboxes, and gearbox rebuilding.

In addition to my civilian experience, I served four years in the United States Army as a Heavy Equipment Mechanic. That experience taught me the importance of discipline, attention to detail, troubleshooting, teamwork, and completing a job correctly and safely. I also attended a technical school for welding and fabrication and have hands-on experience with both MIG and arc welding.

I take pride in being the kind of technician who is willing to tackle difficult jobs, learn when necessary, and see a repair through from diagnosis to completion. I understand the importance of keeping equipment reliable and minimizing downtime, and I bring a strong work ethic and a willingness to do whatever is necessary to get the job done right.

I am also seeking a company that aligns with my core values and is willing to invest in my continued growth as a technician, just as I am committed to investing my time, effort, and skills into growing with the company long-term.

My wife and I are raising our two boys. My family is extremely important to me, and my faith in Christ and my values of honesty, hard work, responsibility, and treating others with respect are principles I carry into my professional life as well.

I would appreciate the opportunity to speak with you about how my experience could benefit your company. I am willing to bring my knowledge of heavy-duty diesel engines, trucks, heavy equipment, fire apparatus, welding, and mechanical troubleshooting to your team and to continue growing as a technician.

Thank you for your time and consideration. I look forward to the opportunity to discuss a position with your company.

Sincerely.

John Jenkins

Overview

6
6
years of professional experience

Work History

diesel engine technician

Stevens trucking
Oklahoma City
07.2026 - Current
  • Executed complete overhauls on various diesel engines to restore functionality.
  • Executed head replacements on diesel engines to optimize operational efficiency.
  • Diagnosed engine, brake, and electrical issues
  • Repaired transmissions, suspensions, and cooling systems to restore vehicle performance.
  • Serviced diesel trucks for the Stevens trucking fleet to maintain vehicle reliability.
  • Performed preventive maintenance on company vehicles
  • Replaced worn parts using hand and power tools

Emergency Vehicle Technician

Banner fire equipment
Oklahoma City
01.2026 - 07.2026
  • Serviced emergency vehicle pumps, hoses, and valves for Banner fire equipment clients.
  • Inspected lights, sirens, and warning systems on fire apparatus and rescue trucks.
  • Diagnosed electrical and hydraulic issues in emergency response vehicles.
  • Repaired chassis components, brakes, and suspension on fire equipment fleet units.
  • Tested installed equipment for proper operation and safety compliance.
  • Communicated repair needs with firefighters, fleet staff, and service coordinators.
  • Provided technical support to staff members regarding the operation of various types of communications equipment installed in the vehicles.
  • Assisted in the installation of communication devices such as radios, computers and GPS units into emergency response vehicles.
  • Performed preventive maintenance inspections, repairs and services on emergency vehicles.
  • Conducted regular tests of all systems on emergency vehicles including lighting and siren operations.
  • Replaced worn parts using hand tools, power tools and other specialized diagnostic equipment.
  • Inspected emergency vehicles for compliance with state safety regulations.

Heavy Equipment Technician

Central Power Systems & Services
Oklahoma City
08.2024 - 01.2026
  • Maintained rental and retail heavy equipment, including excavators, dozers, skid steers, and material handlers, ensuring optimal performance and availability.
  • Conducted thorough inspections and diagnostic checks to ensure fleet readiness and compliance with safety standards.
  • Troubleshoot diesel engines, hydraulics, and electrical systems on power equipment.
  • Carry out repairs on hydraulic systems and structural parts.
  • Repaired fuel systems, cooling systems, and drivetrains using shop tools.
  • Serviced generators, compressors, and construction equipment for Central Power Systems clients.
  • Performed preventive maintenance on fleet machinery and service trucks.
  • Updated dispatch on repair status to ensure timely service with dispatch, supervisors, and field service teams.

Heavy Equipment Mechanic

United States Army / National Guard
Fort Chaffee
03.2021 - 09.2024
  • Maintained and repaired installation's main fleet of heavy equipment, hauling trucks, and fire department vehicles, ensuring operational reliability.
  • Ensured mission readiness through rigorous preventive maintenance and prompt emergency repairs, minimizing downtime and enhancing operational capability.
  • Inspected Army tactical vehicles for mechanical and safety defects.
  • Diagnosed engine, hydraulic, and electrical faults using technical manuals.
  • Repaired diesel engines, transmissions, and brake systems on National Guard equipment.

Diesel Technician

Rush Enterprises
Oklahoma City
12.2023 - 04.2024
  • Diagnosed and repaired the engine, transmission, and HVAC systems, restoring functionality and extending vehicle lifespan.
  • Replaced and serviced critical components, enhancing vehicle safety and operational efficiency.
  • Refurbished and repaired specialized Hydrovac truck fleet, ensuring optimal performance and reliability.

Heavy Equipment Mechanic

EquipmentShare
Oklahoma City
06.2023 - 12.2023
  • Diagnosed and repaired diverse rental fleet of large-scale machinery, enhancing reliability across all major brands.
  • Conducted detailed inspections for rental contracts, contributing to 100% operational uptime.
  • Maintained safe, clean, organized workspace, boosting overall shop efficiency.

Diesel Technician

Dyess Customs
Edmond
03.2022 - 04.2023
  • Diagnosed and repaired semi-trucks and trailers to ensure optimal performance and reliability.
  • Executed full engine overhauls, rebuilds, and major component replacements to restore vehicle functionality.
  • Diagnosed diesel engine, transmission, brake, and electrical issues at Rush Truck Centers.
  • Performed preventive maintenance on trucks using shop tools and diagnostic software.
  • Inspected vehicles for DOT compliance and safety defects.

Diesel Technician

Carco International
Fort Smith
05.2020 - 01.2021
  • Diagnosed and repaired semi-trucks to resolve air leaks, wheel hubs, and perform PM services, ensuring optimal vehicle performance.
  • Diagnosed diesel engine, transmission, and electrical issues using diagnostic software
  • Performed preventive maintenance on trucks, trailers, and heavy-duty equipment
  • Repaired brakes, suspension, steering, and aftertreatment systems

Education

Welding Technology & Blueprint Fabrication

University of Arkansas
Fort Smith
05-2022

Skills

  • Mechanical:Diesel overhauls, Transmission Repair, Brake Systems (Air & Hydraulic), Suspension & Chassis, HVAC Systems, Drive Train Maintenance
  • Diagnostics: Advanced diagnostics, Electrical diagnostics, Drivability Testing, Vehicle Inspections
  • Heavy Equipment: Excavators (Large & Mini), Dozers, Skid Steers, Front End Loaders, Telehandlers, Scissor Lifts, Hydrovac Trucks
  • Technical: Welding and fabrication, Blueprint Reading, Fleet Management Software, Preventive maintenance
  • Engine diagnostics
  • Brake system maintenance
  • Hydraulic system repair
  • Electrical troubleshooting
  • Preventive maintenance
  • Vehicle inspections
  • Fleet servicing
  • Parts installation
  • Service records
  • Safety regulations
  • Teamwork
  • Emission control
  • Inspection protocols
  • Mechanical understanding
  • Computerized tracking
  • Record keeping
  • Safety oversight
  • Quality control
  • Electrical maintenance
  • Pneumatic repair
  • Transmission maintenance
  • Brake and tire service
  • Suspension repair
  • Drivetrain maintenance
  • Steering system repair
  • Hydraulic servicing
  • Steering system maintenance
  • Transmission repair
  • Industrial machinery maintenance
  • Fluid replacement
  • AC system repair
  • Automotive repair
  • Engine restoration
  • Diagnostic evaluations
  • System diagnostics
  • Maintenance planning
  • Performance enhancement
  • Fuel injection
  • Diesel repair
  • Vehicle assessments
  • Computer troubleshooting
  • Root cause identification
  • Shop operations
  • Site safety
  • Cooling system repair
  • Fuel maintenance
  • Clutch repair
  • Turbocharger maintenance
  • Oil maintenance
  • Oil replacement
  • Fuel maintenance
  • Fluid servicing
  • Powertrain maintenance
  • Fluid management
  • Fleet operations
  • Inspection forms

Timeline

diesel engine technician

Stevens trucking
07.2026 - Current

Emergency Vehicle Technician

Banner fire equipment
01.2026 - 07.2026

Heavy Equipment Technician

Central Power Systems & Services
08.2024 - 01.2026

Diesel Technician

Rush Enterprises
12.2023 - 04.2024

Heavy Equipment Mechanic

EquipmentShare
06.2023 - 12.2023

Diesel Technician

Dyess Customs
03.2022 - 04.2023

Heavy Equipment Mechanic

United States Army / National Guard
03.2021 - 09.2024

Diesel Technician

Carco International
05.2020 - 01.2021

Welding Technology & Blueprint Fabrication

University of Arkansas
JOHN JENKINS