Mechanical Engineer Temporary Jobs in California

Position:Supplier Quality Engineer - Temporary

Location: Riverside, CA

Job Id:372

# of Openings:1

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.

Location: Riverside, CA

Salary Range: $95,000 - $130,000/year.

Project Assignment: 6-weeks

The Supplier Quality Engineer is responsible for ensuring that the quality of products and services provided by suppliers meets established specifications and standards. This includes performing audits, managing supplier quality issues, developing improvement plans, and ensuring compliance with industry regulations.

• Assist in the evaluation and selection of suppliers based on quality performance, production capabilities, and cost efficiency.
• Conduct supplier assessments and audits to ensure quality systems meet company requirements.
• Perform regular supplier audits and inspections to verify compliance with quality standards and regulatory requirements.
• Develop and implement quality control plans to monitor supplier performance.
• Collaborate with suppliers to address quality issues and provide guidance on improvement processes.
• Problem Resolution & Root Cause Analysis:
• Investigate and resolve supplier quality issues, including product defects or failures.
• Lead or support root cause analysis (e.g., 5 Whys, Fishbone Diagrams) and corrective action processes for non-conformances.
• Collaborate with suppliers to ensure corrective actions are implemented and sustained.
• Work closely with suppliers to improve their quality systems, processes, and product quality.
• Support continuous improvement initiatives such as Six Sigma, Lean Manufacturing, and other methodologies.
• Develop and maintain quality documentation, including inspection plans, specifications, and reports.
• Monitor and report supplier performance metrics (e.g., supplier scorecards, defect rates, on-time delivery).
• Document non-conformances, deviations, and corrective actions taken.
• Collaborate with internal teams such as Purchasing, Manufacturing, Engineering, and R&D to ensure that supplier quality aligns with company standards.
• Provide quality input during new product development and product lifecycle management.
• Track and evaluate supplier performance based on quality, delivery, and cost.
• Coordinate with the procurement team to ensure the timely delivery of quality materials and components.

Required:

• Bachelor's degree in Engineering (Industrial, Mechanical, Electrical, or a related field) or equivalent experience.
• At least 3-5 years of experience in quality engineering or supplier quality management.
• Experience with supplier audits, inspections, and quality control processes.
• Strong knowledge of quality control methodologies, standards (e.g., ISO 9001, IATF 16949, or other relevant industry standards).
• Proficiency in root cause analysis and problem-solving techniques.
• Experience with statistical tools (SPC, DOE) and quality software systems (e.g., SAP, Minitab, etc.).
• Strong communication skills for working with suppliers and internal teams.
• Problem-solving and analytical thinking.
• Attention to detail and ability to manage multiple tasks.
• Willingness to travel to supplier locations, as required.

Preferred:

• ASQ (American Society for Quality) certifications (e.g., CQE, CQA) are a plus.
• Typically works in an office setting with occasional to frequent travel to supplier facilities or manufacturing sites.
• May require extended hours or availability based on project deadlines or urgent supplier issues.

• 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.

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.