Job Family Description We are seeking a Principal Yield Engineer to provide technical leadership for fab-wide yield improvement, manufacturing process control, and new Fab ramp readiness in a rapidly growing InP photonic integrated circuit (PIC) wafer fab environment. This role serves as a recognized subject matter expert and thought leader, driving cross-functional alignment, establishing scalable yield-management systems, and defining long-term manufacturing quality and process-control strategies across the organization. Yield Strategy & Technical Leadership Establish factory-level frameworks for yield management, excursion response, process control, and quality governance. Lead technical reviews for major yield excursions, chronic manufacturing constraints, and technology-transfer readiness. Prioritize yield opportunities and lead cross-functional initiatives delivering measurable factory-level improvements in yield, scrap reduction, and manufacturing robustness. Excursion Leadership & Manufacturing Execution Lead resolution of critical yield excursions, wafer scrap events, and manufacturing quality incidents. Drive cross-functional investigations involving Integration, Process, Equipment, Manufacturing, Facilities, and Quality teams. Establish root cause, define corrective actions, and ensure sustainable closure through structured problem-solving methodologies. Organizational Influence & Mentorship Mentor Yield, Process, Integration, and Quality Engineers in SPC, DOE, root-cause analysis, and manufacturing problem-solving methodologies. Establish best practices and standard work to improve engineering execution across organizations. Serve as a recognized technical authority for yield, process-control, and manufacturing-quality decisions. Quality Governance Drive continuous improvement of manufacturing quality systems, including SPC governance, excursion management frameworks, control-plan execution, and factory-wide yield visibility. · PhD preferred, or MS in Materials Science, Electrical Engineering, Chemical Engineering, Physics, or a related engineering discipline. · 10+ years of semiconductor or HDD high-volume manufacturing experience. · Proven track record leading major yield-improvement programs resulting in measurable factory-level impact. Experience investigating yield excursions and driving structured problem-solving is strongly preferred. · Demonstrated experience leading complex technical initiatives with multiple engineering organizations. · Recognized technical expert in yield engineering, process control, manufacturing quality, or process integration. · Demonstrated ability to influence senior engineering and operations leadership and drive technical decisions without direct organizational authority. Preferred · Experience supporting technology transfer, fab replication, or manufacturing scale-up activities. · Demonstrated success building yield-management systems, SPC frameworks, or factory-wide process-control methodologies. · Previous technical leadership of engineers across multiple functional groups. · Lean Six Sigma Black Belt or equivalent manufacturing excellence experience.