Sr. Sustaining Engineer

Littelfuse; Piedras Negras; On-site; MXN 900,000 - 1,200,000; Full time

Job summary

Littelfuse is seeking a Sr. Sustaining Engineer to maintain health of the medium voltage fuse portfolio, ensuring compliance and manufacturability at the Piedras Negras facility.

This role partners with Manufacturing, Quality, Applications, and NPD to drive improvements on existing products. You will mentor junior engineers, lead VA/VE and cost-reduction initiatives, coordinate with customers and OEMs on design changes, and ensure timely certification activities with UL/IEC/IEEE standards.

Qualifications

• Bachelor’s degree in Electrical/Mechanical Engineering required.
• 10+ years of sustaining/design engineering experience in electrical products or manufacturing.
• Experience with medium voltage products preferred.
• Strong knowledge of UL/IEC/IEEE/ANSI standards and product certification process.
• Proven track record leading VA/VE and cost-reduction projects.
• Proficiency with 3D CAD (Autodesk Inventor) and GD&T.
• Experience with 8D, FMEA, and DOE.
• Excellent English communication and presentation skills.
• On-site availability at the manufacturing facility.

Responsibilities

• Lead sustaining engineering for existing Industrial Circuit Protection products, including medium voltage fuses.
• Partner with Product Management to identify and execute cost reduction and VA/VE opportunities.
• Collaborate with manufacturing, quality, and process engineering on the factory floor to resolve production issues.
• Work with customers and OEMs to improve design, specifications, and implement customizations.
• Review product ratings and specifications to ensure compliance with UL, CSA, IEC, and IEEE/ANSI standards.
• Manage certification and agency approvals with third‑party labs and bodies.
• Review and modernize prints and initiate engineering change orders as needed.
• Support New Product Development by developing validation plans and sharing lessons learned.
• Mentor and guide junior engineers and technicians.

Skills

Sustaining engineering

Product certifications

Root cause analysis

VA/VE leadership

Autodesk Inventor

GD&T

UL/IEC standards

Cross-functional collaboration

English communication

On-site availability

Education

Bachelor’s degree in Electrical or Mechanical Engineering

Tools

Autodesk Inventor

Job description

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

#LI-KRL

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. Our humble roots date back to 1927, where, in the back of a garage on Chicago’s northside, our founder, Edward Sundt, developed a small, fast‑acting, protective fuse for use in sensitive test meters. Sundt wanted to call his new company producing these small fuses, “Little Fuse,” but wasn’t allowed to trademark two such common words. So, instead he went with the one‑word, misspelled “Littelfuse.” For more than 95 years, Littelfuse has pioneered innovative products that help empower a sustainable, connected, and safer world. With the ever‑evolving electrification and electronification of customer applications, our product technologies are closely linked to sustainable applications such as electric vehicles and EV charging infrastructure, renewable energy and energy storage, factory automation, power management and more. Throughout our history, our people have been the foundation of our success — and that remains true today. Now more than ever, our bright and talented people are a strategic advantage for the company. From the production line to the engineering lab, the office or distribution center, Littelfuse people are an important part of a diverse, talented team of the best and brightest in the industry. While Littelfuse has experienced tremendous growth in recent years, we still maintain a small‑company, entrepreneurial approach where your efforts will drive our culture, our business, and the overall success of the organization. No matter where you work or what you do, your contributions will make a difference at Littelfuse — everywhere, every day.

Littelfuse is an Equal Opportunity/Affirmative Action employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, national origin, gender identity, sexual orientation, disability, protected veteran status, and/or any other protected class under federal, state, or local law.