Technical Documentation Engineer Jobs in California

Join a manufacturing leader with over 50 years of excellence, where every role contributes to building reliable transportation solutions that people depend on everyday across the United States and Canada. At ENC, we prioritize safety, quality, innovation, collaboration, and continuous growth – creating vehicles our teams can take pride in.

Founded in 1975, ENC (ElDorado National – California) is a leading U.S. transportation manufacturer specializing in design, engineering, and end‑to‑end production of heavy‑duty buses, shuttles, and cargo vehicles through a custom‑build, mixed‑model assembly process. Each vehicle is produced in our purpose‑built facility in Riverside, California supporting public agencies and private transportation providers nationwide. We offer one of the industry’s widest portfolios of power options, including 100% battery‑electric, diesel‑electric hybrid, CNG, and clean diesel.

ENC is committed to revitalizing American manufacturing through innovation, customer focus, and the delivery of high‑quality vehicles that keep communities connected, supported, and moving forward.

Aftermarket Technical Engineer, Field Service

Location: Riverside, CA

Salary Range: $95,000‑120,000/yr

Reports to: Warranty Manager

Position Summary

The Field Service Engineer role is responsible for supporting the Service Department through technical engineering expertise assistance on complex issues helping drive solution, service documentation, and product improvement initiatives while serving as a technical liaison between Engineering, Warranty, Production, and Field Service operations. The Field Service Engineer will assist with service‑related drawings, schematics, and field‑driven improvement solutions while also providing technical support to field technicians on an as‑needed basis during complex troubleshooting situations or when additional engineering assistance is required. The role will also work collaboratively with Sr. Technical Specialist to resolve concerns as well as the Field Service Trainer to support development of technical training material and service documentation as needed.

Key Responsibilities

• Provide technical engineering support to field service technicians on an as‑needed basis during complex troubleshooting or repair situations, stepping in on escalated issues when troubleshooting goes beyond the field team
• Assist with diagnosis and engineering evaluation of mechanical, electrical, multiplex, and high‑voltage vehicle systems when elevated technical support is required
• Work directly with the Sr. Technical Specialist on complex issues
• Develop, revise, and support engineering drawings, schematics, layouts, brackets, and service‑related design improvements
• Help lead root cause analysis and ensure implementation, supporting corrective action investigations related to recurring field concerns and warranty trends
• Lead troubleshooting activities involving repeat failures, complex system‑level issues, and unclear root causes, developing effective engineering solutions for real‑world application
• Collaborate with Engineering, Quality, Warranty, Production, and Service teams to improve vehicle reliability, serviceability, and product support
• Assist with development and review of technical service bulletins, troubleshooting guides, repair procedures, and service documentation
• Work collaboratively with the Field Service Trainer to support development of technical training material, presentations, manuals, videos, and customer support documentation as needed
• Participate in customer support visits, technical meetings, prototype reviews, and field campaigns when required
• Support continuous improvement initiatives focused on reducing vehicle downtime and improving customer satisfaction
• Review field feedback and provide recommendations for product improvements and service enhancements
• Maintain accurate technical documentation, engineering revisions, and support records
• Support special projects and other engineering‑related service initiatives as assigned

Position Requirements

• Bachelor’s degree in Mechanical Engineering, Electrical Engineering, Automotive Engineering, or related field
• Minimum 3‑5 years of experience in engineering, technical support, field service, heavy‑duty vehicle or related industry experience
• Experience supporting troubleshooting, product improvements, warranty support, root cause analysis or serviceability initiatives
• Strong mechanical and electrical troubleshooting skills
• Ability to read and interpret electrical schematics, wiring diagrams, engineering drawings, and technical documentation
• Knowledge of heavy‑duty vehicle systems including electrical, mechanical, HVAC, suspension, door, multiplex, and powertrain systems
• Strong analytical and problem‑solving abilities
• Proficiency with Microsoft Office products
• Effective verbal and written communication skills
• Strong organizational skills with the ability to manage multiple projects and priorities
• Ability to work independently and collaboratively across multiple departments
• Valid driver's license required
• Ability to obtain and maintain any required certifications or training related to vehicle systems, high‑voltage systems, or customer site access requirements
• Ability to occasionally travel in support of customer visits, field activities, and technical meetings

Preferred Qualifications

• Experience within the heavy‑duty vehicle, transit bus, commercial vehicle, or OEM manufacturing environment
• Experience supporting field repairs, reliability improvements, or serviceability enhancement initiatives
• Ability to develop practical engineering solutions to support field repairs and serviceability improvements
• Familiarity with CAN/J1939 diagnostics and vehicle communication networks
• Familiarity with heavy‑duty vehicle electrical and multiplex systems
• Understanding of high‑voltage and battery‑electric vehicle systems
• Familiarity with CAD or drafting software

Work Environment

• This is an onsite position based in Riverside, CA
• Travel frequency approximately up to 30% depending on field concerns

Benefits

• Comprehensive benefits package: Medical (including FSA & HSA), dental, vision, life and disability insurance, EAP, mental health, and wellness programs
• 401(k) with employer match
• Paid time off and twelve paid holidays
• Employee referral program
• Career growth and development opportunities

Career Growth at ENC

We believe great careers and leaders are built from within. Many of our team members have advanced into roles that lead or into specialized technical positions. We invest in hands‑on training, skill development, and long‑term career pathways within manufacturing operations.

Equal Opportunity Employer

ElDorado National California Inc. (ENC) is an equal‑opportunity employer and considers all qualified applicants for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, age, disability, veteran status, genetic information, or any other protected class under applicable federal, state, and local laws. We are committed to fostering a diverse and inclusive workplace where all employees feel valued and respected.

ENC takes affirmative action to employ and advance employment opportunities for minorities, women, protected veterans, and individuals with disabilities. We actively encourage qualified candidates from all backgrounds to apply and join our team.

ENC is also committed to ensuring that individuals with disabilities have equal access to opportunities. If you require a reasonable accommodation to complete the application process, please contact HR Department for assistance.

In accordance with California's wage transparency law (Senate Bill 1162), we are committed to pay equity and transparency. The salary range reflected on the job posting is our good faith estimate of what we expect to pay for this role at the time of posting. While we do not typically hire at the top of the salary range, initial offers are based on the candidate’s qualifications and experience, with opportunities for growth and increases over time.