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Principal Engineer, Customer Quality

Littelfuse · IL · Remote available · $123,100–$190,780 a year · Full time

Posted Jun 24, 2026 · We last checked this listing on Oct 6, 2026

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Likely interview questions for this role

Written from this job description, not a generic list. Each one notes what the interviewer is really checking.

About your past

Tell me about a time the factory didn't agree the problem was theirs. How did you get to the truth?

What they are checking: Whether they can lead an investigation across groups using data rather than taking sides.

How do you build a customer-centric quality culture inside a factory that rarely talks to customers?

What they are checking: Whether they can bring the customer's view inside the company, which the role explicitly asks for.

Tell me about a time sales wanted you to accept a customer claim you didn't think was valid.

What they are checking: Whether they balance the relationship with technical honesty.

What would you do

A key automotive customer wants an answer today and you don't have root cause yet. What do you tell them?

What they are checking: Whether they stay honest about what is known while showing a clear plan and containment.

How do you work with factories in other countries and time zones on one complaint?

What they are checking: Whether they can keep a global investigation moving without being in the room.

About the work

You'd be the customer's main contact for quality complaints. Walk me through how you handle a new complaint in the first forty-eight hours.

What they are checking: Whether they contain, communicate and start investigating fast, which is what customers judge first.

How do you run an 8D, and where do teams usually cut corners?

What they are checking: Whether they truly drive root cause and verified corrective action instead of filling out a form.

How do you analyze a failed circuit protection device returned from the field?

What they are checking: Whether they understand failure analysis on fuses and protection parts and how to tell misuse from defect.

What quality tools do you lean on most, like FMEA, control plans or SPC, and why?

What they are checking: Whether they know which tools prevent repeat problems, not just which ones exist.

What metrics would you use to show your customer quality program is working?

What they are checking: Whether they measure things like PPM, response time and repeat complaints to show progress.

Practice this interview out loud.

Offer builds a real interview for this exact role at Littelfuse from your resume and this job description, asks the questions one at a time, and tells you what landed. The first one is free.

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The full job description

As published by Littelfuse.

Littelfuse (NASDAQ: LFUS) is a diversified industrial technology manufacturing company shaping solutions for the safe and efficient transfer of electrical energy. Headquartered in Chicago, Illinois, USA, we serve customers across industrial, transportation, and electronics markets worldwide. With approximately 16,000 employees we design and manufacture innovative technologies that support electrification, energy efficiency, and advanced automation. Our global reach is matched by a culture that empowers innovation and long-term growth. Guided by our principles We Care, We Succeed With Our Customers, and We Own the Outcome, we work collaboratively, think boldly, and deliver solutions that move industries forward. Summary of the role This role serves as the customer’s key contact and interface for all quality related aspects and is responsible for handling customer quality complaints. This position works globally and closely with factory, engineering, sales & marketing, technical teams, and external customers to resolve the quality issue with root cause/corrective actions. The Customer Quality Engineer will build a high-engagement, customer-centric quality culture and deliver a consistent, high-quality customer experience by acting as a trusted partner to key customers while driving internal alignment, execution, and continuous improvement. Key Responsibilities • Act as focal point for all quality-related customer communications including quality complaints. Serve as the voice of the customer to internal team, drive solution for the customer and provide updates to the customer in a timely manner. Lead customer-facing quality discussion including issue resolution and quality reviews. • Establish and deploy global customer quality standards. Collect customer specific requirements and support the review, disposition, and execution of such requirements within the product, manufacturing, and operations environment. • Facilitate Product change management (PCN) to meet customer requirements and support timely implementation. • Work with factories to organize and facilitate customer audits to demonstrate Quality Management System compliance and effectiveness to standards including ISO, IATF, VDA. • Support business reviews, new business opportunities while contributing to product lifecycle management decisions. • Prepare and present quality performance summaries at internal management reviews. Lead the development and execution of Quality Improvement Plans (QIPs) to drive continuous improvement in customer quality scores including product quality, service and responsiveness, and customer specific requirements. • Support customer product inquiries for both existing products and new product opportunities. • Other duties as assigned. Education Bachelor's degree in an Engineering discipline including Electrical Semiconductor Technology, Microelectronics, Electronic, Automation, Mechanical, Electrical Master’s degree is preferred. Qualifications • 10+ years in Quality, Manufacturing or Engineering. • Knowledge of semiconductor manufacturing principles and processes, with failure analysis or reliability experience a plus. • Knowledge of complex electrical or mechanical assemblies. • Understanding of quality management systems such ISO9000, IATF16949 / VDA, ISO13485; audit experience in automotive or medical standards is a plus. • Knowledge of 8D problem solving, requirements management, change management. • Strong analytical and problem-solving skills with high attention to detail. • Experience in a global manufacturing environment preferred, with understanding of operations / planning / logistics. • Knowledge of executing safe launch procedures and product/process transfer activities. • Advanced knowledge in MS Office. • Excellent verbal and written communication skills, with ability to interface effectively with all levels of the organization. • Team oriented and responsive. • Ability to multi-task, prioritize and work in a high-pressure environment. • Up to 25% travel. #LIOB1 

Artificial intelligence (AI) tools may be used in some portions of the candidate review process for this position, however, all final employment decisions will be made by a person. Salary Range: $123,100 - $190,780 The salary offered will vary depending on your location, job-related skills, knowledge, and experience. At Littelfuse, we support employee growth and development. Guided by our culture principles, our teams work together to deliver value for customers and make a positive impact in the communities where we operate. We are an equal opportunity employer committed to fostering an inclusive workplace where everyone has the opportunity to grow and contribute. We offer competitive compensation and benefits, performance-based incentives, flexible work arrangements, and development opportunities.

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