Diesel Shop Manager 

Rockville, VA

 

Job Overview
The Shop Manager is responsible for the day-to-day leadership and operations of the maintenance shop, including mechanics, the parts department, and auto body. This role focuses primarily on the repair and maintenance of the company’s ready-mix concrete mixer truck fleet, while also supporting heavy equipment and other support vehicles. The position ensures high-quality, efficient, and safe maintenance work that maximizes up time for concrete production and delivery operations. The ideal candidate is an experienced mechanic who has advanced into management. Hands-on technical knowledge is essential so the Shop Manager can effectively supervise work quality, diagnose issues, support the team, and keep equipment reliable.

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Key Responsibilities

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Leadership & Team Management

• Directly supervise mechanics, shop helpers, parts personnel, and auto body technicians.

• Lead hiring, training, coaching, performance evaluations, and accountability for shop staff.

• Foster a high-performing, safety-focused team culture and support ongoing skill development.

• Set clear work standards and ensure consistent quality of repairs and maintenance.

 

Shop Operations & Technical Oversight

• Oversee daily shop workflow, work orders, prioritization, and scheduling to maximize uptime.

• Use personal mechanical experience to review diagnoses, repair plans, and completed work.

• Ensure preventive maintenance, repairs, and quality control are performed correctly and cost-effectively.

• Coordinate closely with the parts department on inventory, ordering, and availability.

• Support and oversee auto body repair, painting, and refinishing work as needed.

• Maintain a clean, organized, secure, and professional shop environment.

 

Communication & Coordination

• Work with drivers, dispatch, plant/operations teams, and the Fleet and Equipment Manager to address vehicle and equipment issues promptly.

• Communicate status of repairs, estimated timelines, and any delays that could affect production or deliveries.

• Provide practical input on recurring mechanical problems and recommended corrective actions.

 

Compliance, Safety & Standards

• Enforce all company safety policies, OSHA, DOT/FMCSA, environmental, and shop-specific requirements.

• Ensure proper use of PPE, tools, and equipment, and maintain safe working conditions.

• Support accident/incident investigations related to shop or equipment issues and help implement preventive measures.

 

Performance & Continuous Improvement

• Monitor shop productivity, repair quality, downtime, and costs; identify opportunities to improve efficiency.

• Assist with maintenance records, documentation, and use of fleet/maintenance software systems.

• Contribute practical recommendations on tools, processes, training, and equipment reliability.

 

Qualifications & Requirements

• Proven hands-on experience as a diesel/heavy-equipment mechanic (preferably on ready-mix trucks, dump trucks, loaders, or similar heavy vehicles), followed by supervisory or shop-lead experience.

• Strong technical knowledge of heavy truck and equipment systems, diagnostics, and repair procedures.

• Demonstrated ability to lead and develop a shop team while maintaining high standards of workmanship.

• Working knowledge of preventive maintenance programs, work-order systems, and basic parts inventory practices.

• Familiarity with DOT, OSHA, and shop safety requirements.

• Solid communication, organization, and problem-solving skills.

• Proficiency with basic computer systems and willingness to use maintenance management software.

• Valid driver’s license required; CDL preferred.

• Ability to work in a shop environment, prioritize under pressure, and support operational needs.

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Preferred

• Experience in the ready-mix concrete, aggregates, construction, or heavy-truck fleet industry.

• Prior supervision of both mechanical and auto body/parts functions.