Quality Engineer

Job Description:

• Quality Engineer Location: Carson, CA Department: Quality Reports To: Quality Manager Employment Type: Full-Time, Exempt About Us Woojin IS America, Inc. (WISA), locations in Santa Fe Springs and Carson, CA, is a fast-growing manufacturer specializing in electric equipment for rolling stock and light rail vehicles.
• We proudly serve North American customers with advanced technologies that deliver safe, reliable, and long-lasting transportation equipment.
• About the Role Quality Engineer is responsible for ensuring that rail vehicle equipment and components meet engineering specifications, customer requirements, and internal quality standards throughout the product lifecycle.
• The role supports manufacturing quality, supplier quality, and field performance by investigating product nonconformances, performing root cause analysis, and implementing corrective actions.
• Responsibilities and Accountabilities Product & Manufacturing Quality Ensure manufactured products comply with engineering drawings, specifications, and customer requirements.
• Monitor production processes and quality checkpoints to ensure consistent product quality.
• Support implementation and maintenance of the Quality Management System (QMS) in accordance with standards such as ISO 9001 and ISO 22163.
• Review inspection and test documentation prior to product release or shipment.
• First Article Inspection (FAI) Plan, coordinate, and execute First Article Inspections for new products, engineering design changes, and new suppliers.
• Review engineering drawings, bills of materials (BOM), and technical specifications to develop FAI inspection plans.
• Prepare or review ballooned drawings and dimensional inspection requirements.
• Verify that first production parts meet all dimensional, functional, and material requirements.
• Coordinate with manufacturing, engineering, and supply chain teams to ensure all required documentation and components are available for FAI.

Review and validate supporting documentation including:

• Dimensional inspection results Material certifications Test reports and validation records Document FAI results and prepare formal FAI reports for internal and customer review.
• Identify discrepancies during FAI and initiate Non-Conformance Reports (NCRs) when required.
• Track resolution and closure of FAI-related issues prior to production release.

Nonconformance Management & Root Cause Analysis Investigate product nonconformances identified during:

• Assembly and manufacturing processes Internal testing and validation procedures Customer acceptance testing Field operations or commissioning Document and manage Non-Conformance Reports (NCRs) .

Lead root cause investigations using structured problem-solving methods such as:

• 8D methodology 5 Why analysis Fishbone diagrams Implement and track Corrective and Preventive Actions (CAPA) to prevent recurrence.
• Field Quality & Customer Support Travel to project sites when required to investigate and resolve quality issues.
• Support commissioning, testing, and troubleshooting of rail equipment.
• Prepare technical reports documenting investigation findings and corrective actions.
• Coordinate with project teams and customers to ensure timely resolution of field quality issues.
• Process Improvement Analyze quality trends, defect data, and production metrics.
• Identify opportunities to improve manufacturing processes and product reliability.
• Recommend updates to procedures, inspection plans, or product design to reduce defects.
• Participate in continuous improvement initiatives such as Lean Manufacturing or Six Sigma projects.
• Supplier Quality Support Work with procurement and engineering teams to resolve supplier-related quality issues.
• Support supplier qualification and corrective action activities.
• Review supplier documentation and component compliance with technical specifications.
• Project & Proposal Support Assist with preparation of technical and quality documentation for project proposals.
• Review project specifications to ensure quality requirements are understood and implemented.
• Participate in technical evaluations of components or subsystems proposed for new projects.
• Educational Requirements High School Diploma or Equivalent Required.
• Bachelor’s degree in Mechanical Engineering, Electrical, Mechanical, Industrial, Manufacturing Degree or related technical field preferred.
• Experience Minimum 3~5 years of quality engineering experience in manufacturing.
• Skills & Knowledge Strong knowledge of quality management systems and manufacturing quality processes.
• Experience managing FAI processes, NCRs, and CAPA activities .
• Ability to interpret engineering drawings, technical specifications, and inspection requirements.
• Familiarity with root cause analysis tools and quality methodologies.
• Strong analytical, troubleshooting, and documentation skills.
• Effective cross-functional communication skills.
• Preferred Experience in rail, transportation, aerospace, or heavy equipment manufacturing .
• Familiarity with rail industry standards such as ISO 22163.
• Experience supporting field service, commissioning, or system testing activities .
• Benefits Health Insurance (Medical, Dental, Vision, STD, Critical Illness).
• Paid Time Off (Holidays, Vacation, Sick, Bereavement). 401(k) Plan with Company Match.
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