Mobile Heavy-Duty Truck Mechanic – Field Service (DFW)

Interstate Companies, Inc.; Dallas (TX); On-site; USD 55,000 - 69,000; Full time

Benefits offered by this job

Competitive wages

Uniforms provided

Tool program

Tuition assistance

Health, dental and vision

PTO

Holidays

401K

Long Term Disability

Short Term Disability

Life Insurance

Healthiest You

PPE Reimbursement

Pet Insurance

Employee Discounts

Employee Assistance Program

Health screening

Job summary

Interstate Assembly Systems is seeking a skilled Field Service Mechanic to service and repair heavy‑duty trucks and equipment in the Dallas‑Fort Worth area. You will diagnose mechanical, hydraulic, electrical, and pneumatic issues, perform welding as needed, and test cranes for safety and function.

Travel daily to client sites, maintain equipment, and document repairs while ensuring OSHA and DOT compliance. CDL is a plus and a valid license is required.

Qualifications

• Minimum of 3-5 years of experience as a mechanic working on heavy‑duty trucks or equipment.
• Proven expertise in repairing hydraulic systems, cranes, welders, and air compressors.
• Strong knowledge of diesel engines, electrical systems, and heavy‑duty vehicle diagnostics.
• Welding and fabrication skills (e.g., MIG, TIG, stick welding) preferred.
• Ability to read and interpret technical manuals, schematics, and diagnostic codes.
• Valid driver's license required; CDL is a plus.
• Comfortable working independently in the field and in various weather conditions.
• Excellent problem‑solving skills and attention to detail.
• Physical ability to lift to 50 lbs. and work in confined spaces as needed.
• Certification in crane operation, welding, or heavy equipment repair is an advantage.

Responsibilities

• Conduct routine maintenance and inspections on heavy‑duty work trucks and their integrated systems (cranes, welders, air compressors, etc.).
• Diagnose and repair mechanical, hydraulic, electrical, and pneumatic issues on trucks and attached equipment.
• Perform welding and fabrication tasks as needed to repair or modify truck components.
• Operate and test cranes to ensure proper functionality and safety compliance.
• Service and maintain air compressors and other auxiliary equipment.
• Respond to client service calls in the field, providing timely and effective solutions.
• Document all service work, including parts used, time spent, and detailed repair notes.
• Adhere to safety standards and regulations, including OSHA and DOT requirements.
• Collaborate with clients to explain repairs and provide recommendations for preventative maintenance.

Skills

Heavy-duty repair

Hydraulics

Electrical systems

Diesel engines

Diagnostics

Welding

Tools

Cranes

Air compressors

Welding equipment

Diagnostic tools

Job description

Interstate Assembly Systems is seeking a skilled Field Service Mechanic to service and repair heavy‑duty trucks and equipment in the Dallas‑Fort Worth area. You will diagnose mechanical, hydraulic, electrical, and pneumatic issues, perform welding as needed, and test cranes for safety and function.

Travel daily to client sites, maintain equipment, and document repairs while ensuring OSHA and DOT compliance. CDL is a plus and a valid license is required.