On-Site Mobile Diesel Technician

Job Overview

As an On-site Mobile Diesel Technician with Fast Fleet, you’ll ensure our client’s vehicles operate efficiently and safely. This role involves independently diagnosing and performing preventive maintenance on light, medium, and heavy-duty trucks and trailers in a mobile setting, where no two days are the same. From handling basic repairs to conducting DOT inspections and managing inventory on your company-issued service truck, you’ll take ownership of your daily schedule, prioritize tasks, and apply technical expertise to keep fleets on the road. Supported by Fast Fleet’s dispatch team, you’ll work alongside skilled professionals committed to quality service and customer satisfaction.

Fast Fleet offers a collaborative, problem-solving environment where technicians receive competitive hourly compensation, a weekly payroll, and a sign-on bonus. As a technician, you’ll engage in ongoing development, building diagnostic skills and experience with advanced repairs under minimal supervision. With opportunities to work on a wide range of vehicle systems—including electrical, hydraulic, and fuel—this position is ideal for those with a strong mechanical background, a customer-focused approach, and a desire to take the next step in their career with a growing, national leader in mobile fleet maintenance.

• Weekly payroll frequency
• Hourly pay: $22 to $26 per house based on experience
• $1,000 sign-on bonus after 90 days
• Typical schedule: Monday - Friday (7 am to 4 pm)

Qualifications

• High School Diploma or equivalent preferred; vocational or technical certifications a plus
• Minimum 3 years of experience with diagnostics and mechanical repairs for heavy-duty and medium-duty vehicles
• Valid driver’s license and ability to obtain a DOT Medical Card within 72 hours of hire
• Capability to handle physically demanding tasks, including lifting, bending, and standing for extended periods
• Must supply a set of hand tools required for job duties
• Pass Fast Fleet's background check, 3-year MVR check, drug test, and DOT physical
• requirements
• Must be 21 years or older and able to take home the assigned service truck, securing
• vehicle and contents as needed

Responsibilities and Job Duties

• Decision Making: Independently diagnose and troubleshoot vehicle issues, performing necessary repairs with minimal guidance.
• Repair & Maintenance: Conduct preventive maintenance, DOT inspections, and comprehensive repairs for light, medium, and heavy-duty vehicles in field environments.
• Technical Expertise: Perform and manage repairs on various vehicle systems,
• including electrical, cooling, brake, and fuel systems; execute basic and advanced diagnostic assessments.
• Inventory and Equipment Management: Maintain, track, and manage parts inventory and tools on the assigned service truck.
• Documentation: Complete DOT and company-required forms and documentation accurately and promptly.
• Communication: Engage in effective two-way communication with team members and management for support and guidance.
• Preventive Maintenance: Conduct routine checks and maintain vehicle systems, including brakes, steering, suspension, and A/C and heater systems.

Preventive Maintenance (PM) and Vehicle Repair Responsibilities:

• A/C and Heater: Assess cooling function; check compressor power, condenser, and belt tension; identify Freon and oil leaks.
• Air Brakes: Inspect air brake components; listen for irregular noises and air leaks; perform basic system tests, measure components, and adjust brakes.
• Hydraulic Brakes: Conduct road tests; inspect for leaks; check fluid levels and brake operation; adjust and repair brakes as needed.
• Cargo Handling/Liftgates: Identify leaks, check fluid levels, operate lift gates, make minor adjustments, and identify common issues.
• Charging Systems: Inspect batteries, connections, and belts; test and replace as necessary; perform standard charging system checks.
• Clutch: Lubricate key components; ensure proper clutch and clutch brake operation.
• Cooling System: Check coolant levels, inspect for leaks, replace hoses, and conduct system flushes; use refractometers and pressure testers.
• Cranking System: Inspect and test batteries and cables; clean and replace components as needed.
• Lighting/Electrical Accessories: Address minor wiring issues, replace bulbs and assemblies, and install accessories.
• Drive Axles: Inspect for leaks, change oil, and maintain clean breathers.
• Driveline: Lubricate and inspect for wear.
• Engines: Check and adjust oil levels; listen for unusual noises and detect leaks.
• Fuel Systems: Replace filters, and inspect fuel lines and components.
• General PM: Conduct lube services, check tires, brakes, batteries, and components, and identify initial fault codes.
• Steering/Alignment: Lubricate fittings, adjust fluid levels, check steering components, and ensure trailer alignment.
• Suspension/Chassis: Identify wear on bushings, broken springs, and other common issues.
• Tires/Wheels: Check air pressure and tread; replace tires, rotate, and conduct basic tire inspections.
• Coupling System: Lubricate and test the fifth wheel and slider mechanisms.

Skills and Competencies

• Strong problem-solving abilities and sound judgment in identifying and addressing vehicle issues
• Self-motivated with the ability to work independently, manage multiple priorities, and meet productivity standards
• Proficient with diagnostic tools and hand tools, maintaining and adjusting equipment to ensure reliability and safety on the road

Job Type: Full-time

Pay: $22.00 - $26.00 per hour

Expected hours: 40 per week

Benefits:

• 401(k)
• Paid time off
• Professional development assistance

Schedule:

• 8 hour shift
• Monday to Friday

Experience:

• Diesel engine repair: 2 years (Required)
• Mechanical knowledge: 1 year (Required)
• Preventative maintenance: 1 year (Required)

Ability to Commute:

• Columbia, TN 38401 (Required)

Work Location: In person

Salary : $22 - $26