Diesel Mechanic

About Magnolia Plumbing, LLC

For over 75 years, Magnolia Plumbing, LLC has proudly served the DC metropolitan area, delivering reliable solutions for both residential and commercial customers across heating and cooling (HVAC), plumbing, wastewater management, and underground site utility work.

We believe the best service starts with the best people, so we hire the best and invest in their success.

 Magnolia Plumbing, Inc.'s Laurel-based office is seeking a knowledgeable and experienced Diesel Mechanic to join our team. The Diesel Mechanic will be responsible for maintaining, inspecting, diagnosing, and repairing Magnolia's fleet of commercial vehicles and equipment, including vacuum/scavenger trucks, diesel trucks, work vans, SUVs, and sedans.

This role plays an important part in ensuring our vehicles and equipment remain safe, reliable, and ready to support daily operations.

• Perform preventative maintenance, inspections, and repairs on diesel-powered vehicles, trucks, trailers, and equipment.
• Diagnose and troubleshoot diesel engines, electrical systems, hydraulic systems, and mechanical issues.
• Perform repairs on brakes, suspension, steering, engines, transmissions, and other vehicle components.
• Inspect vacuum/scavenger trucks and other fleet vehicles to identify maintenance needs, mechanical issues, and potential safety concerns.
• Service and maintain commercial trucks, work vans, SUVs, sedans, and utility equipment.
• Perform routine oil changes, fluid checks, filter replacements, tire inspections, and other scheduled maintenance.
• Troubleshoot and repair hydraulic components, hoses, pumps, and related systems as needed.
• Use diagnostic equipment, tools, and technical resources to identify problems and complete repairs.
• Complete scheduled maintenance, repairs, and emergency service requests in a timely manner.
• Test vehicles and equipment after repairs to ensure proper operation and safety.
• Maintain accurate maintenance records, inspection reports, and repair documentation.
• Track parts, materials, and supplies needed for vehicle maintenance and repairs.
• Communicate repair needs, equipment conditions, and maintenance recommendations to management.
• Coordinate with management and fleet personnel to prioritize repairs and minimize vehicle downtime.
• Maintain tools, equipment, and work areas in a clean, organized, and safe condition.
• Follow all company policies, manufacturer guidelines, and applicable safety procedures.

• High school diploma or GED preferred.
• Minimum of 2 years of experience as a diesel mechanic, fleet mechanic, or heavy equipment mechanic.
• Experience diagnosing and repairing diesel engines and commercial vehicles.
• Knowledge of hydraulic, electrical, brake, suspension, steering, and drivetrain systems.
• Experience working on trucks, trailers, vacuum trucks, utility vehicles, or construction equipment preferred.
• Ability to perform preventative maintenance and identify potential mechanical issues.
• Ability to use diagnostic tools, equipment, and repair manuals to troubleshoot mechanical problems.
• Valid driver's license required.
• CDL and ASE certifications preferred.
• Strong attention to detail, problem-solving, and organizational skills.
• Ability to work independently and manage multiple repair priorities.
• Ability to communicate effectively with management and team members.
• Ability to lift up to 75 pounds and perform physically demanding work.
• Commitment to workplace safety and maintaining a clean work environment.

Benefits & Culture

• Medical benefits starting the first of the month, plus company-paid life insurance and long-term disability.
• Company contributions to 401(k) and HSA.
• Company-paid Employee Assistance Program (EAP) and mental health coverage.
• Company-paid Basic Life Insurance Policy.
• Paid time off (PTO) available from day one.
• Empowered environment: we trust you to own your work.
• Opportunity to pursue trade school and ongoing professional development.
• Safety Incentive bonus.