Diesel Mechanic

DeWitt Guam; Tamuning (GU); On-site; USD 45,000 - 65,000; Full time

Benefits offered by this job

FSA Medical and Dependent Accounts

401(k) Plan

Paid Time Off

Paid Holidays

Job summary

DeWitt Guam is seeking a skilled Diesel Mechanic to service, repair, and maintain our diverse fleet across heavy‑duty, medium‑duty, and light‑duty vehicles on Guam. The role focuses on diesel engines, transmissions, hydraulics, and electrical systems with attention to safety and accurate service records.

You will diagnose issues, perform engine, brake, drive train, and A/C repairs, maintain logs, and use OEM diagnostics.

Qualifications

• Experience with diesel engines and heavy‑duty equipment.
• Ability to read electrical schematics and diagnose complex issues.
• Proficiency with diagnostic software and OEM resources.
• Must be able to obtain DBIDS clearance.
• Comfortable performing preventive maintenance and inspections.

Responsibilities

• Repair and maintain engines, transmissions, differentials, turbochargers, and fuel systems.
• Service Class 8 trucks and various duty vehicles on fleet.
• Tune and maintain engines and equipment including hydraulics and pumps.
• Perform engine, brake, drive train, electrical, and A/C repairs.
• Record all work orders and maintain maintenance logs.
• Use diagnostic programs and OEM resources for troubleshooting.
• Troubleshoot breakdowns and ensure operational readiness.
• Adhere to OSHA, DOT, and EPA safety standards.

Skills

Diagnostic software

Electrical troubleshooting

Electrical schematics

DBIDS access

Heavy equipment operation

Safety compliance

Job description

About Us:

DeWitt Guam operates a diverse fleet across the island and is committed to safety, reliability, and efficiency in transportation and logistics. We value skilled professionals who take pride in maintaining vehicles and equipment at the highest standards. Join our team and help keep our fleet running smoothly.

Position Overview:

We are seeking a skilled Diesel Mechanic to service, repair, and maintain our fleet vehicles and equipment. This role involves hands‑on work with diesel engines, transmissions, drive trains, hydraulics, and electrical systems across heavy‑duty, medium‑duty, and light‑duty vehicles. The ideal candidate is detail‑oriented, safety‑conscious, and able to work independently while maintaining accurate service records.

Key Responsibilities:

Engine and Transmission Repair

Repair and maintain engines, transmissions, differentials, turbochargers, and fuel system components.

Service Class 8 trucks (Freightliner, Peterbilt, Mack, International), medium‑duty, trailer, and light‑duty vehicles.

Tune and maintain fleet engines and equipment, including forklifts, scissors lifts, hydraulics, and pumps.

Perform all types of engine, brake, drive train, electrical, and A/C repairs.

Fleet Maintenance and Record Keeping

Record all work orders.

Maintain accurate records of service, repair, and parts usage.

Use diagnostic programs and OEM resources for engines, hydraulic systems, and brake systems.

Equipment and Troubleshooting

Service machinery and mechanical equipment, performing preventive maintenance and repairs.

Troubleshoot breakdowns and maintain operational readiness.

Ensure equipment operates efficiently by following instructions, maintaining supplies, and calling for external repairs when needed.

Regulatory Compliance

Adhere to OSHA, DOT, and EPA safety and regulatory standards.

Qualifications:

Proficient with computer diagnostic software.

Ability to solve complex electrical problems and read electrical schematics.

Must be able to obtain DBIDS.

Physical ability to lift, carry, push, and pull heavy objects, often exceeding 50 pounds.

Stamina to stand, crouch, and kneel for extended periods.

Ability to climb ladders or scaffolding and work under vehicles.

Personal tools required; large/specialty tools provided.

Willingness to travel locally for vehicle repairs if needed.

Welding knowledge preferred.

Strong independent work ethic and problem‑solving skills.

FSA Medical and Dependent Accounts

401(k) Plan

Paid Time Off

Paid Holidays

• Pay commensurate with experience

DeWitt Guam is an equal opportunity employer.

Equal Opportunity Employer/Protected Veterans/Individuals with Disabilities
This employer is required to notify all applicants of their rights pursuant to federal employment laws.For further information, please review the Know Your Rights notice from the Department of Labor.