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.

The Sr. Sustaining Engineer is responsible for ensuring our existing product offering, including our medium voltage fuse portfolio, is healthy and in good standing with the various stakeholders including internal engineering teams, customers, and certification bodies. As a senior technical contributor, this role will lead efforts to maintain standards certifications, add new and increased approvals to existing solutions, and execute VA/VE strategies for our core products. Candidates should be self-motivated, detail-oriented engineers who work well both independently and in a team role, and who are comfortable guiding and mentoring others. The Sr. Sustaining Engineer must have a proven track record of scoping, leading, and executing projects. The individual will work with the Manufacturing, Quality, Applications, and New Product Development teams along with key customers, so strong communication and presentation skills are a must. Collaboration with the Product Management team will be critical to ensure the appropriate efforts and projects are being prioritized.

Reporting to the Engineering Manager and located within our manufacturing facility, the Sr. Sustaining Engineer is a critical role ensuring we continue to deliver cost-effective and high-quality solutions to our customers, bringing them the most value possible. Being based in the factory allows this engineer to work hands-on with production, quality, and process teams to resolve product issues quickly and put improvements into practice.

About Your Job:

·   Lead sustaining engineering activities for existing Industrial Circuit Protection products, including medium voltage fuses, to ensure product health, manufacturability, and compliance

·   Partner with Product Management to identify and execute cost reduction and VA/VE opportunities across assigned product lines

·   Work directly with manufacturing, quality, and process engineering on the factory floor to resolve production issues and drive root cause and corrective actions

·   Work closely with customers and key OEMs to improve product design and specifications, implement customizations, and mitigate future product complaints

·   Review product ratings and specifications ensuring our solutions maintain compliance to new and revised UL, CSA, IEC, and IEEE/ANSI standards

·   Manage certification and agency approval activities, including test planning and coordination with third-party labs and certification bodies

·   Review and modernize prints for legacy solutions, and initiate engineering change orders when suppliers or manufacturing update or modify requirements

·   Support New Product Development teams by developing product validation plans and sharing lessons learned from the field and the factory

·   Mentor and provide technical guidance to junior engineers and technicians

About You:

·   Bachelor’s degree in Electrical Engineering, Mechanical Engineering, or a related engineering discipline

·   10+ years of engineering experience in sustaining, product, or design engineering within an electrical products or manufacturing environment

·   Prior experience with medium voltage products is highly preferred, with direct experience in medium voltage fuses strongly preferred

·   Strong working knowledge of relevant UL, IEC, and IEEE/ANSI standards and the product certification process

·   Demonstrated experience leading VA/VE and cost reduction projects from concept through implementation

·   Proficiency with 3D CAD (Autodesk Inventor preferred) and engineering drawings, including GD&T

·   Experience with structured root cause analysis and problem-solving methods such as 8D, FMEA, and DOE

·   Strong communication skills and fluent in English (written and verbal), with the ability to present to customers and leadership

·   Strong analytical, critical thinking, and problem-solving skills; highly organized with high attention to detail

·   Proficient in Microsoft Office products, with the ability to collect, interpret, and compile data efficiently and independently

·   Available to work full time on site at our manufacturing facility

·   Experience working with new products introduction.

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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.