Engineer Principal, Supplier Quality

Job Title

Engineer Principal, Supplier Quality

Role Summary

Lead supplier quality for MEMS and LCOS semiconductor components to ensure robust supplier processes, consistent product quality, and successful NPI-to-production ramps. Work cross-functionally with Component Engineering, Manufacturing, Procurement, Operations, and external suppliers to drive supplier qualification, failure analysis, corrective actions, and continuous improvement.

Experience Level

Senior level. The role specifies 10+ years of relevant experience in semiconductor or supplier quality.

Responsibilities

Main responsibilities include:

• Manage supplier quality for MEMS, LCOS devices, wafers, components, assemblies, and related materials.
• Lead supplier qualification, capability assessment, audits, and ongoing performance monitoring.
• Conduct supplier process and product audits; assess quality systems and control plans.
• Evaluate wafer fabrication, MEMS formation, bonding, wafer-level packaging, dicing, assembly, optical alignment, testing, and inspection processes.
• Drive supplier quality activities from NPI to mass production: design reviews, process qualification, first article inspection, and production ramp-up.
• Review and approve supplier documentation (PFMEA, control plans, SPC, MSA, reliability plans, change-control).
• Lead root-cause analysis and corrective actions using structured methods (8D, 5 Why, DOE, etc.).
• Coordinate failure analysis for electrical, mechanical, optical, contamination, yield, and reliability issues.
• Monitor supplier KPIs (yield, DPPM, returns, corrective-action closure, capability, on-time delivery) and manage supplier change notifications.
• Develop and oversee supplier improvement plans and support customer/internal audits as needed.

Requirements

Must-have:

• 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, or optical component suppliers.
• Hands-on experience with root-cause analysis, 8D, CAPA, SPC, MSA, FMEA, control plans, and process capability analysis.
• Ability to interpret engineering drawings, test and process data, and reliability reports.
• Experience performing supplier audits and process qualifications; willingness to travel to supplier sites.
• Strong communication, negotiation, project management, and cross-functional collaboration skills.
• Fluent in written and spoken English.

Nice-to-have:

• Experience with MEMS, LCOS, wafer-level packaging, flip-chip, wire bonding, die attach, optical alignment, and active/passive assembly.
• Experience with optical/electrical characterization and semiconductor reliability testing.
• Familiarity with industry standards (ISO 9001, IATF 16949, ISO 13485, JEDEC, IPC) and statistical tools (Minitab, JMP) or equivalent.
• Master's degree in a relevant technical field (preferred).

Education Requirements

Bachelor's degree or above in Electrical Engineering, Semiconductor Engineering, Materials Science, Mechanical Engineering, Optics, Physics, or a related technical discipline. A Master's degree in a relevant field is preferred.

About the Company

Company: Lumentum

Headquarters: Milpitas, California, United States

Lumentum develops optical and photonic products and subsystems for telecommunications, data centers, cloud computing and industrial applications, providing lasers, modulators, transceivers and test solutions that enable high-speed networking and advanced photonics.