Do Thanh Phung

Quality Engineer with 16 years of experience in supplier quality, incoming quality control (IQC), process validation, and continuous improvement within manufacturing environments. Strong background in ISO systems, process qualification, CAPA/SCAR management, 8D problem solving, FMEA, and statistical process control. Currently leading Incoming QA and Supplier quality activities at Coherent Vietnam, with expertise in calibration systems, first article evaluation (FAI), CMM programming, and risk-based quality management and Supplier management.

Senior QA Supervisor at Coherent Vietnam (2022-07 – Present)

• Led Incoming Quality Control (IQC) activities, developed inspection criteria, and implemented AQL sampling plans to ensure compliance with product specifications and quality standards.
• Reviewed and dispositioned Non-Conforming Materials (NCM) in coordination with Engineering and Production, ensuring appropriate containment, root cause analysis, and corrective actions.
• Managed Supplier NCR, SCAR, and 8D investigations; verified effectiveness of corrective and preventive actions (CAPA) to prevent recurrence.
• Executed First Article Inspection (FAI) and qualification for new suppliers, components, and engineering changes to ensure readiness for production release.
• Established and maintained internal calibration systems, ensuring measurement equipment control and preventive maintenance compliance.
• Supported Process Qualification and Validation activities (IQ/OQ/PQ), ensuring processes meet capability and regulatory requirements.
• Conducted supplier audits and capability assessments to ensure alignment with quality system and technical requirements.
• Performed advanced measurement and failure analysis support using CMM (Hexagon, Zeiss), optical measurement systems (Keyence), and material analysis tools (XRF/XRD).
• Ensured compliance with ISO 13485 quality system requirements and applied risk-based thinking in quality control and process validation activities.

QA Engineer at Coherent Vietnam (II-VI Vietnam) (2017-11 – 2022-07)

• Managed Incoming Inspection and AQL Control
• Non-Conforming Material (NCM) Review and Disposition
• Supplier Defect Trend & PPM Monitoring
• First Article Inspection (FAI) for New Parts
• Calibration and Inspection System Control

Quality Engineer at New Hanam (2015-02 – 2017-11)

• Conducted Process Capability Studies (Cp, Cpk) to evaluate process performance and drive continuous improvement initiatives.
• Identified Critical-to-Quality (CTQ) parameters and strengthened process control strategies to ensure product consistency.
• Developed and improved Process FMEA (pFMEA) to mitigate risks and enhance product reliability.
• Analyzed lot rejection trends and yield performance data to identify root causes and implement corrective and preventive actions.
• Led Product Failure Analysis (FA) using structured problem-solving methodologies (8D, Fishbone, 5Why) and effective corrective actions.
• Executed factory line audits and recommended Corrective Action Requests (CAR) to improve manufacturing compliance and process robustness.
• Performed production process validation and supported engineering in implementing process changes and ECNs.
• Evaluated non-conforming products and recommended appropriate rework, repair, or disposition decisions based on quality and risk assessment.
• Collaborated cross-functionally in project management meetings to ensure quality requirements are integrated during new product introduction (NPI).
• Participated in supplier and retailer factory assessment audits to ensure manufacturing processes meet quality and regulatory standards.

Supplier Quality Engineer at Vietnam Suzuki Corporation (2009-11 – 2015-02)

• Acted as the primary quality interface between suppliers and engineering to clarify technical specifications and ensure alignment with product requirements.
• Defined supplier quality requirements, including receiving inspection criteria, source inspection plans, and specification control drawings.
• Monitored supplier performance using 5-Panel KPIs (Quality, Delivery, Cost, Responsiveness, Compliance) and drove continuous improvement initiatives.
• Issued and managed Supplier Corrective Action Requests (SCAR) using structured problem-solving methodologies (8D), ensuring timely containment, root cause analysis, and corrective action effectiveness.
• Analyzed nonconforming trends, supplier Escaping PPM, and failure data on daily/weekly basis to prevent recurrence and reduce defect rates.
• Provided technical training, process guidance, and capability improvement recommendations to suppliers to enhance process stability and quality performance.
• Conducted supplier audits (process, system, and compliance audits) and supported internal, customer, and third-party audit activities.
• Collaborated with Procurement to perform annual Supplier Evaluation and maintain approved supplier list (ASL) qualification status.
• Reviewed and approved Supplier Process Change Notices (PCN), ensuring risk assessment, validation requirements, and documentation updates were properly implemented before production release.
• Ensured supplier compliance with IATF 16949 and regulatory quality system requirements.
• Applied risk-based evaluation (FMEA) during supplier process changes.
• Supported PPAP submission and qualification activities for critical components.

Bachelor in Mechanical Shipbuilding – Nha Trang University (2006 – 2010)