Build Your Career with Liesfeld Contractor
We are seeking a highly skilled Diesel Mechanic to join our team and take on advanced diagnostics, repair, and maintenance of diesel-powered trucks and heavy construction equipment. This is a hands-on, high-skill role focused on major mechanical systems and plays a critical part in keeping our fleet and field operations running safely, efficiently, and without unnecessary downtime.
At Liesfeld Contractor, mechanics are trusted professionals who solve complex mechanical challenges—not just replace parts. From preventive maintenance and high-volume fleet repairs to advanced electrical, hydraulic, and diagnostic troubleshooting, you’ll work on a wide range of equipment that supports major site development and heavy civil construction projects across the region.
This position is ideal for an experienced mechanic who can confidently diagnose problems, complete repairs with minimal supervision, and take ownership of equipment reliability. We are looking for someone who takes pride in precision work, enjoys troubleshooting difficult problems, and wants to be part of a team that values experience, craftsmanship, and accountability.
Key Responsibilities
- Perform advanced diagnostics, maintenance, and repair on diesel trucks and heavy construction equipment
- Independently perform high-volume fleet repairs with minimal supervision, including:
- Wheel-end inspections and repairs, brake systems, and air brake components
- Kingpin inspections and replacement
- Preventative maintenance services, oil changes, and routine fleet servicing
- Tire mounting, dismounting, and tire-related repairs
- Hydraulic system diagnostics and repairs, including replacing hydraulic lines, changing hydraulic cylinders, and rebuilding cylinders when required
- Electrical troubleshooting, wiring repairs, lighting systems, and component replacement
- DPF/aftertreatment system diagnostics and repairs
- Reading and interpreting diagnostic scan tool data to identify root causes—not simply identifying fault codes
- Light welding, fabrication, and repair support as needed
- Complete engine and transmission pull-outs, rebuilds, and installations
- Troubleshoot and repair electrical, hydraulic, and mechanical systems through root-cause analysis
- Ensure all repairs meet company safety and quality standards while minimizing equipment downtime
- Maintain accurate service records, repair documentation, and maintenance logs
- Collaborate with field teams and supervisors to quickly resolve equipment issues
- Safely operate diagnostic tools, software, and shop equipment
- Follow all company safety policies and maintain a clean, organized work environment
Required Qualifications
- High school diploma or GED
- 3–5 years of hands-on diesel mechanic experience in construction, fleet, or heavy equipment environments
- Ability to independently diagnose and repair diesel trucks and heavy equipment with minimal supervision
- Strong experience with:
- Air brake systems and commercial truck brake repairs
- Hydraulic systems troubleshooting and repair
- Electrical diagnostics and troubleshooting
- Preventative maintenance and fleet service repairs
- Diagnostic scan tools and interpreting live data, fault codes, and system information
- Experience performing mechanical repairs including wheel ends, kingpins, tires, suspension, and drivetrain components
- Strong attention to detail, problem-solving ability, and commitment to quality workmanship
- Ability to manage workload efficiently in a fast-paced shop environment
- Legally authorized to work in the United States
- Valid Virginia driver’s license with a clean driving record
Preferred Qualifications
- Experience with heavy construction equipment repair
- Experience with CAT, John Deere, Komatsu, Link-Belt, Peterbilt, and similar equipment manufacturers
- ASE certification or equivalent industry credentials
- Experience with OEM diagnostic software and fleet maintenance systems
- Welding and fabrication experience
- CDL Class A or ability to obtain
- Experience mentoring or supporting mechanics
- Bilingual (Spanish) skills a plus
Physical Requirements
- Ability to work in shop and field environments with exposure to noise, dust, grease, diesel exhaust, and varying weather conditions
- Ability to stand, bend, kneel, crouch, and perform physical repair work for extended periods
- Ability to lift and carry up to 50 lbs or more
- Ability to climb ladders, steps, and equipment as needed
- Strong visual ability to diagnose mechanical issues and read technical information
· Ability to consistently wear and utilize all required personal protective equipment (PPE) in accordance with company and safety standards
· Ability to travel between job sites and handle tools, parts, and equipment as required
Why Join Us
- Full-time, stable position with a respected family-owned company in the Greater Richmond region
- Primarily shop-based work with occasional field support assignments
- Steady flow of diverse, challenging equipment repair work
- Opportunities for long-term career growth and advancement
- Supportive, team-oriented environment where skilled mechanics are valued and respected
Benefits
- Competitive compensation based on experience
- Opportunities for career advancement and professional development
- Health, dental, and vision benefits
- 401(k) retirement plan with company match
- Paid time off and company holidays
- Supportive and team-oriented work environment
Looking for a company where your skills in diagnostics, engines, hydraulics, electrical systems, air brakes, and heavy equipment repair are put to real use every day? We’d love to hear from you. Apply today and discover the difference at Liesfeld Contractor.
Please visit our website and apply today: https://liesfeld.com/job/mechanic/
Job Type: Full-time
Location:
- Rockville, VA 23146 (Required)
Work Location: In person
