Diagnostic Diesel Technician (Fleet & Maintenance Department)
About The Position
Ecology Auto Parts, Inc. is seeking a highly skilled and tech-savvy Diagnostic Diesel Technician to join our dynamic Fleet & Maintenance team. This position requires advanced knowledge in diesel mechanics paired with modern diagnostic expertise, specifically with Cummins and Paccar engine platforms. The ideal candidate will bring a deep understanding of electronic diagnostic software, data analysis, and fault resolution to ensure our fleet is operating at peak performance. Working under the direction of the Shop Manager, the selected candidate will serve as the go-to technician for engine diagnostics, root cause analysis, and smart repair strategies, supporting operations at either our Long Beach or Santa Fe Springs locations.
Requirements
- Minimum 3 years of diesel mechanic experience with advanced troubleshooting abilities
- Proven experience with Cummins and Paccar engine diagnostics, software use, and repairs
- High School Diploma or equivalent (required); technical certification in Diesel Technology (preferred)
- Valid Driver’s License and eligibility to work in the U.S.
- Strong proficiency in electronic diagnostic tools, laptops, and OEM software systems
- Ability to read and interpret wiring diagrams, schematics, and technical service bulletins
- Highly organized, self-motivated, and able to prioritize tasks in a fast-paced environment
- Capable of lifting 50–75 pounds, bending, standing, and working in physically demanding conditions
- Commitment to safe practices and compliance with all federal and state regulations
Nice To Haves
- technical certification in Diesel Technology (preferred)
Responsibilities
- Diagnose and repair engine issues using OEM diagnostic platforms (Cummins Insite, Paccar DAVIE4, etc.)
- Conduct electrical, emission system, and sensor diagnostics across a variety of heavy-duty diesel trucks
- Interpret fault codes and performance data, update ECU software, and calibrate sensors as needed
- Perform advanced preventative maintenance and major component overhauls when necessary
- Troubleshoot aftertreatment systems, DEF issues, DPF regens, and other emissions-related concerns
- Document all repair activities in fleet maintenance software systems with accuracy and clarity
- Assist in training junior mechanics on electronic diagnostics and standard repair techniques
- Provide input on fleet condition and recommend strategies to reduce downtime and improve efficiency
- Maintain cleanliness, organization, and safety of assigned workspaces in accordance with OSHA and company standards
Benefits
- medical, dental, and vision insurance
- a 401k plan with employer matching
- generous paid time off
- life insurance coverage
Stand Out From the Crowd
Upload your resume and get instant feedback on how well it matches this job.
What This Job Offers
Job Type
Full-time
Career Level
Mid Level
Education Level
High school or GED
Number of Employees
1,001-5,000 employees
