Fleet Diesel Technician — Maintenance & Diagnostics

Kelly Generator & Equipment Inc; Owings Mills (MD); On-site; USD 42,000 - 66,000; Full time

Job summary

Kelly Generator & Equipment, Inc. is seeking an experienced Fleet Mechanic to maintain and repair our fleet of service vehicles, trucks, trailers, and equipment across the Mid‑Atlantic region.

You will perform preventative maintenance, diagnostics, and repairs while documenting service history to support field operations. The ideal candidate has hands‑on experience with commercial vehicles, diesel engines, and heavy‑duty machinery, with a focus on safety, quality workmanship, and keeping

Qualifications

• Strong mechanical aptitude and problem‑solving skills.
• Ability to diagnose issues rather than simply replace components.
• Knowledge of preventive maintenance practices.
• Ability to use hand tools, power tools, and diagnostic equipment.
• Strong organizational and documentation skills.
• Ability to communicate effectively with internal teams.
• Ability to prioritize urgent repairs while maintaining attention to detail.

Responsibilities

• Perform preventative maintenance and repairs on company vehicles, trucks, trailers, and equipment.
• Conduct routine inspections to identify potential safety concerns and maintenance needs.
• Perform oil changes, brake repairs, suspension repairs, tire services, fluid services, and general mechanical repairs.
• Diagnose and repair mechanical, electrical, hydraulic, and engine‑related issues.
• Troubleshoot vehicle and equipment failures using diagnostic tools and technical resources.
• Complete repairs efficiently while maintaining high‑quality workmanship.
• Diagnose vehicle and equipment issues through systematic troubleshooting.
• Utilize computerized diagnostic equipment, service manuals, wiring diagrams, and technical resources.
• Identify root causes of failures and recommend appropriate repairs.
• Communicate repair needs, parts requirements, and estimated timelines.
• Maintain accurate records of inspections, repairs, parts used, and maintenance history.
• Follow preventative maintenance schedules to minimize downtime.
• Maintain fleet readiness for field service operations.
• Assist with tracking parts, inventory, and repair‑related expenses.
• Ensure all work is completed according to manufacturer specifications and company safety standards.
• Follow all company safety policies and procedures.
• Perform work in a safe manner using proper tools, equipment, and PPE.
• Ensure vehicles and equipment meet operational and safety requirements.
• Maintain a clean, organized, and professional work environment.
• Work closely with Service Operations, Field Technicians, and leadership to support business needs.
• Prioritize repairs based on operational urgency.
• Provide recommendations to improve fleet reliability and reduce downtime.
• Support other maintenance‑related projects as needed.

Skills

Mechanical aptitude

Diagnostics

Preventive maintenance

Documentation

Communication

Prioritization

Tools

Diagnostic equipment

Wiring diagrams

Job description

Kelly Generator & Equipment, Inc. is seeking an experienced Fleet Mechanic to maintain and repair our fleet of service vehicles, trucks, trailers, and equipment across the Mid‑Atlantic region.

You will perform preventative maintenance, diagnostics, and repairs while documenting service history to support field operations. The ideal candidate has hands‑on experience with commercial vehicles, diesel engines, and heavy‑duty machinery, with a focus on safety, quality workmanship, and keeping