Adam Medlin
Woodbury
Summary
Detail-oriented Diesel Mechanic with proven skills in diesel engine diagnostics, fuel injection repair, and electrical troubleshooting. Committed to ensuring vehicle safety and performance through thorough inspections and preventative maintenance.
Overview
40
40
years of professional experience
Work History
Diesel Mechanic level 2
Cummins
White Bear Lake
05.2025 - 01.2026
- Diagnosed diesel engine issues using specialized diagnostic tools.
- Conducted routine maintenance on heavy-duty trucks and equipment.
- Repaired fuel systems, brakes, and electrical components efficiently.
- Collaborated with team members to streamline repair processes, improving workflow efficiency.
- Maintained a clean and organized work environment for safety compliance.
- Inspected vehicles for compliance with industry standards and regulations.
- Documented service records accurately to ensure proper maintenance history.
- Installed new parts such as radiators, injectors, hoses, belts, alternators, starters.
- Performed preventative maintenance on diesel engines and equipment.
- Diagnosed mechanical problems and made necessary repairs.
- Inspected vehicles for safety issues and roadworthiness.
- Conducted a checklist of fluid levels, air filter, tire pressure, and additional maintenance tasks for service orders.
- Repaired fuel injection systems, turbochargers, brakes, and exhaust systems to restore vehicle functionality and reliability.
- Cleaned and lubricated parts before reassembly of the unit, engine, vehicle.
- Cleaned and organized tools after each use to maintain a safe work environment.
- Assisted in the removal of engines from vehicles in order to replace them with new ones.
- Welded broken metal parts using oxyacetylene torches and electric arc welders.
- Removed and disassembled defective diesel engines in automobiles, trucks, buses, and construction vehicles to complete repairs.
- Conducted in-depth inspections of vehicle brakes, steering, and other systems to ensure safety and performance standards.
- Improved function of engines by replacing spark plugs, fuel filters and defective sensors.
Diesel Mechanic level 1
Cummins
Avondale
04.2022 - 05.2025
- Performed routine maintenance on various diesel-powered equipment and vehicles.
- Repaired fuel systems, electrical systems, and exhaust systems on diesel engines.
- Documented service records and parts usage to support efficient repair processes.
- Ensured compliance with safety standards while working in a shop environment.
- Installed new parts such as radiators, injectors, hoses, belts, alternators, starters.
- Performed preventative maintenance on diesel engines and equipment.
- Maintained accurate records of all services performed on diesel engines.
- Identified and resolved mechanical issues to ensure vehicle reliability and safety.
- Inspected vehicles for safety issues and roadworthiness.
- Performed checklist of fluid levels, air filter, tire pressure, and other components during service orders.
- Followed safety guidelines while performing repair work on heavy-duty vehicles.
- Repaired fuel injection systems, turbochargers, brakes, and exhaust systems.
- Assisted in the removal of engines from vehicles in order to replace them with new ones.
- Welded broken metal parts using oxyacetylene torches and electric arc welders.
- Removed and disassembled defective diesel engines in automobiles, trucks, buses, and construction vehicles to complete repairs.
- Completed simple and advanced repairs according to specifications for brakes, exhaust and electrical systems.
- Conducted thorough inspections of vehicle systems to ensure optimal safety and performance.
- Raised trucks, buses and heavy parts or equipment with hydraulic jacks or hoists.
School Bus Mechanic
Tippecanoe School Corporation
Lafayette
10.2018 - 04.2022
- Inspected school buses for mechanical issues and safety compliance.
- Performed routine maintenance including oil changes and brake inspections.
- Repaired electrical systems, ensuring proper functionality of lights and signals.
- Maintained detailed records of repairs and maintenance activities to support operational integrity.
- Organized and maintained workshop environment to enhance efficiency and safety.
- Ensured that all tools were properly stored after use.
- Performed electrical system repairs, including wiring harnesses and starters.
- Assisted other mechanics with repairing vehicles when needed.
- Installed new accessories such as radios, lights, mirrors and horns on school buses according to customer requests.
- Adhered to safety protocols while working in the shop environment.
- Inspected, repaired and maintained school buses to ensure safe operation.
- Performed preventative maintenance on school buses including oil changes, tire rotations and brake repairs.
- Checked fluid levels regularly and topped up fluids.
- Repaired bus engines and replaced worn or defective parts.
- Attended seminars related to bus mechanic duties when available.
- Replaced fuel filters, air filters and spark plugs in accordance with manufacturer's recommendations.
- Cleared work area and disposed of waste to ensure safety.
- Adjusted brakes, steering systems and suspension components to manufacturer's specifications.
- Maintained vehicles by changing oil, checking batteries and lubricating components.
- Completed in-depth inspections of vehicle brakes, steering and other systems to check for safety and performance issues.
- Performed maintenance inspections, tune-ups, oil changes and other key services.
- Optimized brake systems by adjusting and replacing components.
- Used diagnostics and troubleshooting tools to identify failures and equipment issues.
- Raised trucks, buses and heavy parts or equipment with hydraulic jacks or hoists.
- Conducted test drives to verify functionality and safety of repairs performed.
- Removed old oil, replaced filters, and added correct amounts of fluids.
- Completed simple and advanced repairs according to specifications for brakes, exhaust and electrical systems.
- Reviewed brakes and assessed whether pads needed replacement, discs should be turned or other service requirements.
- Improved function of engines by replacing spark plugs, fuel filters and defective sensors.
- Examined and adjusted protective guards, loose bolts and specified safety devices.
- Conducted visual inspections of compressed natural gas fuel systems to identify cracks, discoloration and abrasions.
Parts Manager /Heavy Diesel Mechanic
MacAllister Machinery Company
Lafayette
03.2010 - 10.2018
- Managed inventory levels for parts and equipment at MacAllister Machinery Company.
- Trained staff on best practices in parts management and inventory control.
- Implemented efficient storage solutions to optimize warehouse space and accessibility.
- Built vendor relationships to secure favorable purchase terms.
- Streamlined order processing to improve workflow in parts department.
- Monitored compliance with safety standards and regulations within the warehouse environment.
- Maintained inventory accuracy by counting stock-on-hand and reconciling discrepancies.
- Maintained records of all orders placed, received, and shipped.
- Tracked inventory levels for parts, tools, and supplies to ensure adequate stock.
- Developed and maintained positive working relationships with vendors.
- Resolved customer inquiries related to part availability or quality issues.
- Coordinated delivery schedules for incoming orders.
- Provided technical advice on the selection of replacement parts.
- Investigated discrepancies between physical inventories and records.
- Established individual parts inventory levels to balance stock for maximum inventory turns.
- Received, examined and reshelved returned parts.
- Performed scheduled inventory audits to verify accuracy and product availability.
- Implemented ordering process improvements to enhance efficiency.
- Analyzed pricing trends to optimize cost savings.
- Improved function of engines by replacing spark plugs, fuel filters and defective sensors.
- Completed simple and advanced repairs according to specifications for brakes, exhaust and electrical systems.
- Removed old oil, replaced filters, and added correct amounts of fluids.
- Examined and adjusted protective guards, loose bolts and specified safety devices.
- Optimized brake systems by adjusting and replacing components.
- Installed accessories and non-OEM components to meet vehicle operator needs.
- Checked vehicle mileage and determined necessary belts, fluids flushing or gasket replacements.
- Installed new vehicle systems and components.
- Performed checklist of fluid levels, air filter, tire pressure and more as part of service orders.
Parts Specialist
Empire Machinery
Flagstaff
04.2006 - 03.2010
- Managed inventory of parts for machinery and equipment.
- Advised customers on optimal parts selection to meet their specific needs.
- Coordinated with suppliers to order necessary components.
- Maintained accurate inventory records to support efficient parts management.
- Processed customer orders efficiently and accurately.
- Collaborated with service technicians to ensure timely parts availability.
- Resolved customer inquiries regarding parts and services promptly.
- Processed returns, exchanges, and refunds in a timely manner.
- Detected and addressed potential issues with defective or damaged parts prior to customer delivery.
- Maintained parts system with current order and sales data.
- Coordinated shipping arrangements for outbound orders.
- Inspected and verified incoming parts for accuracy against invoices, delivery notes, and packing slips.
- Assisted customers with product selection based on their needs.
- Assisted retail, wholesale and service customers with selecting optimal parts for different needs.
- Coordinated and executed daily parts deliveries to local businesses.
- Made recommendations to customers to promote brand effectiveness and product benefits.
Fleet Manager/Truck Driver/Repair Technician
Graves Propane
Flagstaff
06.1996 - 04.2006
- Managed fleet operations to ensure timely delivery of propane products.
- Coordinated vehicle maintenance schedules to enhance performance and ensure safety compliance.
- Oversaw driver training programs to enhance safety protocols and service quality.
- Analyzed fleet performance data to identify areas for operational improvement.
- Maintained fleet of vehicles by scheduling preventative maintenance and repairs to minimize downtime.
- Conducted regular vehicle inspections to identify potential problems or issues.
- Detected mechanical issues in work vehicles and submitted maintenance requests to the shop department.
- Ensured all drivers had valid licenses, completed required training, and adhered to safety standards.
- Reviewed driver logs for accuracy to ensure compliance with regulatory standards.
- Mentored drivers and encouraged employees to successfully manage time for optimal mileage performance.
- Created reports on vehicle utilization and mileage tracking.
- Managed daily operations of the fleet department including staffing, scheduling and performance management.
- Coordinated with vendors for parts ordering, repairs and services.
- Prepared weekly report summarizing key performance indicators for senior management review.
- Supervised driver information, including estimated time of arrival and planned time of arrival, which helped in all delivery scheduling.
- Performed accident investigations to determine cause and liability.
- Mitigated regulatory risks by monitoring vehicles to ensure operational, state and federal compliance.
- Supervised employees to promote optimal productivity in job tasks and duties.
- Assessed fuel usage and developed strategies to reduce costs and improve efficiency.
- Identified gaps and opportunities for improvements and implemented corrective action to maintain optimal fleet performance.
- Monitored budget expenses to ensure compliance with company guidelines.
- Sustained safety protocols, ensuring proper and cost-effective usage of equipment and materials.
- Managed inventory levels of spare parts used in maintenance activities.
- Analyzed route efficiency and implemented changes to reduce fuel consumption and improve delivery times.
- Maintained accurate delivery logs and paperwork for regulatory compliance.
- Conducted pre-trip inspections to ensure vehicle safety and compliance.
- Inspected truck before and after trips, ensuring all safety regulations were followed.
- Demonstrated safe driving by observing road rules, exercising caution in unfamiliar areas and maintaining vehicle control.
- Performed daily pre-trip inspections on vehicles to ensure safe operation on the roadways.
- Ensured deliveries were on time by following designated routes and adhering to traffic laws.
- Maintained records such as vehicle logs, records of cargo, or billing statements in accordance with regulations.
- Complied with DOT requirements for background checks prior to operating a CMV.
- Reported all accidents or violations to management immediately upon occurrence.
- Followed appropriate safety procedures for transporting hazardous materials when applicable.
- Notified customers of potential late deliveries, resulting in decrease in calls to company support line.
- Utilized hand tools and diagnostic equipment for troubleshooting issues effectively.
- Conducted routine maintenance on propane systems to ensure safety and efficiency.
- Replaced defective components with compatible replacements sourced from suppliers.
- Repaired and performed quality testing of products to meet established specifications.
- Maintained equipment performance by cleaning and lubricating components.
- Coordinated with suppliers to order replacement parts as needed.
- Developed and maintained positive relationships with customers to encourage repeat business.
- Filled out work orders, repair logs and maintenance plans to document work completed.
Diesel Mechanic - Mobile
Minute Man Road Service (Self-employed)
Flagstaff
01.1991 - 06.1996
- Diagnosed mechanical issues in diesel engines and related systems.
- Performed routine maintenance on various diesel-powered vehicles and equipment.
- Repaired and replaced damaged parts using hand and power tools.
- Conducted inspections to ensure compliance with safety regulations.
- Collaborated with clients to assess service needs, ensuring customer satisfaction.
- Installed new parts such as radiators, injectors, hoses, belts, alternators, starters.
- Performed preventative maintenance on diesel engines and equipment.
- Maintained accurate service records for diesel engines, facilitating efficient repairs and tracking.
- Diagnosed mechanical problems and made necessary repairs.
- Inspected vehicles for safety compliance, enhancing roadworthiness and reliability.
- Performed checklist of fluid levels, air filter, tire pressure and more as part of service orders.
- Followed safety guidelines while performing repair work on heavy-duty vehicles.
- Checked all fluid levels regularly; topped off when necessary.
- Cleaned and lubricated parts before reassembly of the unit, engine, vehicle.
- Cleaned and organized all tools after use to maintain a safe and efficient workspace.
- Assisted in the removal of engines from vehicles in order to replace them with new ones.
- Welded broken metal parts using oxyacetylene torches and electric arc welders.
- Tested electrical circuits for faults using diagnostic computers.
- Completed simple and advanced repairs according to specifications for brakes, exhaust and electrical systems.
- Removed old oil, replaced filters, and added correct amounts of fluids.
- Completed standard inspections to assess wear and damage to vehicles.
Shop Technician
Little America Truck Stop
Flagstaff
06.1986 - 01.1991
- Maintained and repaired truck stop equipment to ensure operational efficiency.
- Replaced worn or defective parts on machines using hand tools or power tools.
- Utilized knowledge of mechanical and electrical systems to effectively troubleshoot and resolve various issues.
- Assisted in troubleshooting electrical problems with machinery and equipment.
- Cleaned and lubricated moving parts of machinery to maintain operational efficiency.
- Conducted thorough cleaning, inspection, and verification of equipment operations to identify repair and maintenance needs.
- Implemented best practices for maintaining a clean and organized workspace.
- Completed work orders accurately in the shop management system.
- Provided prompt assistance to customers with inquiries, enhancing overall service experience at the shop.
Education
Occupational Associates Degree - Automotive And Diesel Repair
Universal Technical Institute
Phoenix, AZ06-1986
High School Diploma -
El Toro High School
El Toro, CA05-1985
Skills
- Diesel engine diagnostics
- Fuel injection repair
- Electrical troubleshooting
- Preventive maintenance
- Brake inspection
- Vehicle inspection
Timeline
Diesel Mechanic level 2
Cummins
05.2025 - 01.2026
Diesel Mechanic level 1
Cummins
04.2022 - 05.2025
School Bus Mechanic
Tippecanoe School Corporation
10.2018 - 04.2022
Parts Manager /Heavy Diesel Mechanic
MacAllister Machinery Company
03.2010 - 10.2018
Parts Specialist
Empire Machinery
04.2006 - 03.2010
Fleet Manager/Truck Driver/Repair Technician
Graves Propane
06.1996 - 04.2006
Diesel Mechanic - Mobile
Minute Man Road Service (Self-employed)
01.1991 - 06.1996
Shop Technician
Little America Truck Stop
06.1986 - 01.1991
Occupational Associates Degree - Automotive And Diesel Repair
Universal Technical Institute
High School Diploma -
El Toro High School