Diesel Technician II - Fleet Diagnostics & Repairs

Zum Transportation; Oakland (CA); On-site; USD 52,000 - 68,000; Full time

Job summary

Zūm Services, Inc. is seeking a Technician II for its San Bernardino, CA maintenance site. You will diagnose and repair vehicles, assist with major rebuilds, and perform preventive maintenance to keep the fleet safe and reliable for student transportation.

The role requires 2–4 years of fleet repair experience, strong diagnostic, electrical, and AC skills, and CDL/ASE credentials. You will work with senior technicians, document work, and uphold safety standards in a fast-paced setting.

Qualifications

• Minimum of 2–4 years of medium/heavy truck fleet mechanic repair experience.
• Diagnostic, electrical, and AC skills are required.
• Technical knowledge of major vehicle systems and diesel equipment.
• Familiarity with diesel and gasoline systems is preferred.
• Must possess essential hand tools for Medium/Heavy Duty Diesel Technician.
• CDL license must be obtainable within 90 days of employment.

Responsibilities

• Diagnose malfunctions and perform repairs across steering, electrical, cooling, brakes, drive trains, and transmissions.
• Assist with rebuilding engines, transmissions, and differentials as directed.
• Conduct test drives during Preventative Maintenance and verify repairs.
• Coordinate inspections and obtain approvals before releasing vehicles.
• Record time, parts, and maintenance performed; perform on-road repairs as needed.
• Maintain a safe, organized work area and comply with guidelines.

Skills

Fleet mechanic repair

Diagnostics

Electrical systems

Air conditioning (AC) knowledge

Judgment/Decision-making

CDL license

Education

ASE Certification (Brake, Suspension, Engine, Electrical, A/C)

Master School Bus Technician or Master Truck Technician

Job description

Zūm Services, Inc. is seeking a Technician II for its San Bernardino, CA maintenance site. You will diagnose and repair vehicles, assist with major rebuilds, and perform preventive maintenance to keep the fleet safe and reliable for student transportation.

The role requires 2–4 years of fleet repair experience, strong diagnostic, electrical, and AC skills, and CDL/ASE credentials. You will work with senior technicians, document work, and uphold safety standards in a fast-paced setting.