Senior Process Engineer

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.

Senior Process Engineer

Location: Riverside, CA

Salary Range: $123,000 - $133,000

Position Summary

We are seeking a Senior Process Engineer to establish and improve the manufacturing processes required to build vehicles safely, consistently, and efficiently.

This is a key new position within the organization and will serve as the bridge between Design Engineering and Production. The Senior Process Engineer will take engineering designs, drawings, and Bills of Materials (BOMs) and translate them into clear, controlled, production-ready processes that manufacturing personnel can reliably follow.

The successful candidate will play a critical role in supporting the company's current pilot bus program, documenting lessons learned and establishing standardized processes that can be carried forward into future production and mass-production programs. It will also help transit production from skill-based personnel to document-based personnel.

Key Responsibilities

This list of essential duties is not all-inclusive and may be expanded to include other duties, as management may deem necessary from time to time. The team member must be able to perform each essential job duty identified below satisfactorily. Reasonable accommodations may be made to enable qualified individuals with disabilities to perform the essential duties of this position unless doing so would create an undue hardship.

Manufacturing Process Development

• Develop and document assembly and manufacturing processes for transit buses/future models.
• Translate engineering drawings, BOMs, and specifications into practical production processes.
• Define assembly sequences, required tools, materials, fasteners, and quality checkpoints.
• Identify opportunities to improve efficiency, quality, and repeatability.

Work Instructions & Documentation

• Create clear, easy-to-follow work instructions for production personnel.
• Include part numbers, quantities, tools, torque requirements, fasteners, installation procedures, and inspection points.
• Maintain accurate and revision-controlled manufacturing documentation.
• Develop visual instructions using photographs, drawings, or illustrations when appropriate.

BOM & Part Identification

• Review engineering BOMs and drawings for completeness and manufacturability.
• Identify missing parts, hardware, information, or discrepancies before production.
• Establish clear part identification and labeling practices.
• Help develop and maintain manufacturing BOMs and production documentation.

Pilot Build Support

• Work directly with Production during pilot vehicle builds.
• Document assembly issues, missing information, design problems, and production difficulties.
• Maintain a structured pilot-build issue and lessons-learned log.
• Work with Design Engineering and Production to resolve issues.
• Update processes, BOMs, and work instructions based on lessons learned.
• Investigate production problems and identify root causes.
• Reduce assembly errors, rework, and production delays.
• Establish repeatable processes that can be scaled to future production.
• Capture lessons learned from pilot builds and incorporate them into future manufacturing standards.

Position Requirements

• Bachelor's degree in Manufacturing, Mechanical, Industrial Engineering, or related field.
• 7+ years of experience in automotive, transit bus, commercial vehicle, heavy equipment, or other complex assembly manufacturing.
• Experience in manufacturing, process engineering, or production engineering.
• Ability to read and interpret engineering drawings and BOMs.
• Experience creating work instructions and manufacturing documentation.
• Strong mechanical and manufacturing knowledge.
• Strong organizational and problem-solving skills.
• Comfortable working directly with production personnel on the manufacturing floor.

This is an onsite position based in Riverside, CA and requires being onsite.

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 (12) 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 positing 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.