Test Lab & Prototype Supervisor

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.

Littelfuse is seeking a Test Lab & Prototype Supervisor to build, lead, and continuously improve our Industrial Circuit Protection (ICP) Test Lab and Prototype Center in San Sebastián, Spain. This is a highly hands-on role for someone who enjoys working directly with equipment, troubleshooting technical issues, and bringing new laboratory capabilities to life. You will play a key role in setting up new test equipment, supporting prototype development, and ensuring the lab is fully prepared to support R&D and product qualification activities.

About the job:

• Lead the setup, commissioning, and day-to-day operation of the Test Lab and Prototype Center.
• Supervise and coordinate Test Lab and Prototype Technicians, setting priorities and providing technical guidance.
• Maintain, troubleshoot, and repair electrical test equipment, laboratory systems, and prototyping tools.
• Coordinate prototype builds and test activities in collaboration with R&D and Product Development teams.
• Support the acquisition, installation, and qualification of new laboratory equipment and tooling.
• Design, build, and improve prototype fixtures, tooling, and laboratory capabilities, including 3D printing solutions.
• Establish and execute preventive maintenance plans to maximize equipment reliability and minimize downtime.
• Diagnose and resolve technical issues encountered during prototype assembly and testing.
• Ensure equipment calibration, maintenance records, and laboratory documentation are kept up to date.
• Promote a safe working environment by enforcing laboratory safety procedures and PPE requirements.
• Develop relationships with external suppliers supporting tooling, maintenance, fixtures, and prototype manufacturing.

About you:

• 7+ years of hands-on experience in laboratory operations, maintenance engineering, industrial equipment, prototyping, or a related technical environment.
• Technical education in Electrical Engineering, Electromechanics, Industrial Maintenance, or a related field.
• Experience setting up, commissioning, installing, or maintaining industrial or laboratory equipment.
• Strong troubleshooting skills with electrical, electromechanical, and testing systems.
• Experience supporting prototype development, test setups, or custom equipment builds.
• Ability to supervise and coordinate a small technical team in a fast-paced R&D environment.
• Highly organized, with experience managing maintenance schedules, calibration activities, and technical documentation.
• Hands-on mindset with a genuine passion for understanding, building, and fixing equipment.
• Experience working with suppliers, equipment procurement, or laboratory infrastructure projects is an advantage.
• Fluency in Spanish and English.

Littelfuse strives to empower associate growth and development in a culture of ongoing collaboration and respect for diverse global perspectives and expertise.

Our Core Values – We Care, We Succeed With Our Customers, We Own The Outcome – support us in our mission to improve the safety, reliability, and performance of our customers’ products that use electrical energy.

We are an equal-opportunity employer that takes pride in giving every associate the means and courage to make a difference – everywhere, every day.

#LI-EW1

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.