The Senior Engineer,, Applications Engineering (APC) is responsible for developing, implementing, and sustaining Advanced Process Control (APC) systems—including run‑to‑run (R2R) control and fault detection & classification (FDC)—to improve manufacturing yield, process capability, cycle time, and equipment productivity. The role requires close collaboration with process, equipment, and IT engineering teams to deploy scalable APC solutions, advance automation initiatives, and drive continuous improvement across wafer manufacturing operations.

As part of the industry’s transition from traditional feedback‑based APC to AI‑augmented, model‑driven control, the Senior Engineer will help integrate predictive and data‑driven methods that more accurately identify process drift, reduce variability, and minimize scrap. These next‑generation APC capabilities leverage machine learning, virtual metrology, and advanced equipment analytics to enhance system stability and responsiveness.

The Senior Engineer plays a critical role in enabling these AI‑enhanced manufacturing capabilities while ensuring stable, high‑quality, and efficient wafer production.

ESSENTIAL DUTIES & RESPONSIBILITIES

• Implement APC solutions in collaboration with Process Engineering, Equipment Engineering, IT, and external partners. 
• Lead APC/automation projects through production release and quantify improvements against baseline metrics. 
• Perform data analysis to develop and optimize FDC models for real‑time fault detection.
• Configure and deploy new control strategies and automation recipes; support recipe management and specification database setups. 
• Develop and tune R2R control models using feedback and feed‑forward algorithms. 
• Create advanced FDC models for scrap prevention, tool matching, predictive maintenance, and condition‑based maintenance.
• Conduct system integration testing for R2R, FDC, and automation host systems. 
• Maintain R2R and FDC systems; monitor controller/model performance and initiate continuous improvement activities.
• Increasing use of predictive maintenance and health‑monitoring models leveraging FDC + ML to identify faults earlier and reduce unplanned downtime. 
• Troubleshoot system issues and support system recovery during failures. 
• Participate in roadmap planning for future APC and automation capabilities. 
• Work effectively in a fast‑paced, cross‑functional environment and model continuous improvement behaviors.

Qualifications

REQUIRED-Must Have The Following

• BS/MS in Engineering (Computer, Electrical, Chemical, Industrial, Mechanical), Applied Physics, Operations Research, Data Science or Statistics.
• Experience with semiconductor R2R control and FDC systems.
• Strong analytical and programming skills; proficiency with statistical analysis and ML tools such as JMP, Python, and multivariate analysis platforms.
• Knowledge of semiconductor processing technologies and equipment.
• Solid understanding of IT systems, including:
  • Linux system administration and shell‑based workflow,
  • Windows OS,
  • SQL Server & SQL queries,
  • Networking,
  • SECS/GEM communications, and
  • Data acquisition systems.

SKILLS

• Experience applying large language models (LLMs) or AI‑assisted engineering workflows for data analysis, troubleshooting support, automation scripting, documentation generation, or accelerating APC/FDC model development.
• Effective verbal and written communication skills with project‑management experience.

Additional information

Western Digital is committed to providing equal opportunities to all applicants and employees and will not discriminate against any applicant or employee based on their race, color, ancestry, religion (including religious dress and grooming standards), sex (including pregnancy, childbirth or related medical conditions, breastfeeding or related medical conditions), gender (including a person’s gender identity, gender expression, and gender-related appearance and behavior, whether or not stereotypically associated with the person’s assigned sex at birth), age, national origin, sexual orientation, medical condition, marital status (including domestic partnership status), physical disability, mental disability, medical condition, genetic information, protected medical and family care leave, Civil Air Patrol status, military and veteran status, or other legally protected characteristics. We also prohibit harassment of any individual on any of the characteristics listed above. Our non-discrimination policy applies to all aspects of employment. We comply with the laws and regulations set forth in the "Know Your Rights: Workplace Discrimination is Illegal” poster. Our pay transparency policy is available here.

Western Digital thrives on the power and potential of diversity. As a global company, we believe the most effective way to embrace the diversity of our customers and communities is to mirror it from within. We believe the fusion of various perspectives results in the best outcomes for our employees, our company, our customers, and the world around us. We are committed to an inclusive environment where every individual can thrive through a sense of belonging, respect and contribution.

Western Digital is committed to offering opportunities to applicants with disabilities and ensuring all candidates can successfully navigate our careers website and our hiring process. Please contact us at jobs.accommodations@wdc.com to advise us of your accommodation request. In your email, please include a description of the specific accommodation you are requesting as well as the job title and requisition number of the position for which you are applying.

Based on our experience, we anticipate that the application deadline will be 12-17-2026 (3 months from posting), although we reserve the right to close the application process sooner if we hire an applicant for this position before the application deadline. If we are not able to hire someone from this role before the application deadline, we will update this posting with a new anticipated application deadline.

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Compensation & Benefits Details

• An employee’s pay position within the salary range may be based on several factors including but not limited to (1) relevant education; qualifications; certifications; and experience; (2) skills, ability, knowledge of the job; (3) performance, contribution and results; (4) geographic location; (5) shift; (6) internal and external equity; and (7) business and organizational needs.
• The salary range is what we believe to be the range of possible compensation for this role at the time of this posting.  We may ultimately pay more or less than the posted range and this range is only applicable for jobs to be performed in California, Colorado, New York or remote jobs that can be performed in California, Colorado and New York.  This range may be modified in the future.
• If your position is non-exempt, you are eligible for overtime pay pursuant to company policy and applicable laws.  You may also be eligible for shift differential pay, depending on the shift to which you are assigned.

• You will be eligible to be considered for bonuses under either WD’s Short Term Incentive Plan (“STI Plan”) or the Sales Incentive Plan (“SIP”) which provides incentive awards based on Company and individual performance, depending on your role and your performance. You may be eligible to participate in our annual Long-Term Incentive (LTI) program, which consists of restricted stock units (RSUs) or cash equivalents, pursuant to the terms of the LTI plan. Please note that not all roles are eligible to participate in the LTI program, and not all roles are eligible for equity under the LTI plan. RSU awards are also available to eligible new hires, subject to WD's Standard Terms and Conditions for Restricted Stock Unit Awards.

• We offer a comprehensive package of benefits including paid vacation time; paid sick leave; medical/dental/vision insurance; life, accident and disability insurance; tax-advantaged flexible spending and health savings accounts; employee assistance program; other voluntary benefit programs such as supplemental life and AD&D, legal plan, pet insurance, critical illness, accident and hospital indemnity; tuition reimbursement; transit; the Applause Program; employee stock purchase plan; and the WD Savings 401(k) Plan.
• Note: No amount of pay is considered to be wages or compensation until such amount is earned, vested, and determinable. The amount and availability of any bonus, commission, benefits, or any other form of compensation and benefits that are allocable to a particular employee remains in the Company's sole discretion unless and until paid and may be modified at the Company’s sole discretion, consistent with the law.

Notice To Candidates:

Please be aware that WD and its subsidiaries will never request payment as a condition for applying for a position or receiving an offer of employment. Should you encounter any such requests, please report it immediately to WD Ethics Helpline or email compliance@wdc.com.

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