Engineer Principal, Supplier Quality - Thailand - Pathumthani (Navanakorn), Thailand

Originally posted 5 October 2026 by the employer.

Drive supplier quality excellence for semiconductor commodities supporting MEMS and LCOS devices.

About the role

The major tasks involve improving the quality performance of suppliers supporting MEMS and LCOS devices.

What you'll do

• Manage supplier quality for MEMS and LCOS devices, wafers, components, assemblies, and related semiconductor materials.
• Lead supplier qualification, capability assessment, and ongoing performance monitoring.
• Conduct supplier process audits, product audits, and quality system assessments.
• Evaluate semiconductor manufacturing processes, including wafer fabrication, MEMS structure formation, bonding, wafer-level packaging, dicing, assembly, optical alignment, testing, and final inspection.
• Lead root-cause analysis and corrective actions for supplier-related issues using 8D, Fishbone, 5 Why, and DOE.
• Monitor supplier quality dashboard, including yield, DPPM, customer returns, corrective-action closure, process capability, and on-time delivery.

What you'll need

• Bachelor’s degree or above in Electrical Engineering, Semiconductor Engineering, Materials Science, Mechanical Engineering, Optics, or Physics.
• 10+ years of experience in semiconductor quality, supplier quality, wafer manufacturing, optical components, or advanced packaging.
• Experience working with semiconductor suppliers, wafer fabs, OSATs, MEMS manufacturers, optical component suppliers, or display-related suppliers.
• Strong knowledge of semiconductor manufacturing processes, quality systems, and supplier management practices.
• Hands-on experience with root-cause analysis, 8D, CAPA, SPC, MSA, FMEA, control plans, and process capability analysis.
• Ability to interpret engineering drawings, specifications, test data, process data, and reliability reports.
• Experience with supplier audits and process qualification.

Nice to have

• Experience with MEMS, LCOS cell, or related optical electro products.
• Knowledge of wafer-level packaging, flip-chip, wire bonding, die attach, optical alignment, and active/passive assembly.
• Experience with optical and electrical characterization, including wavelength response, uniformity, contrast ratio, switching performance, leakage current, image quality, and reliability testing.
• Familiarity with ISO 9001, IATF 16949, ISO 13485, JEDEC, IPC, or other relevant industry standards.
• Experience with statistical data analysis and quality tools such as Minitab, JMP, or equivalent software.
• Master’s degree in a relevant technical field.