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# Test Lab & Prototype Supervisor

- **Company:** Littelfuse, Inc.
- **Location:** San Sebastián, Spain
- **Contract:** Permanent contract
- **Skills:** 3D Printing, Software Prototyping, Rapid Prototyping Process, Reliability Engineering
- **Published:** November 12, 2026
- **Apply:** https://littelfuse.wd1.myworkdayjobs.com/Littelfuse-Careers/job/San-Sebastian/Test-Lab---Prototype-Supervisor_JR-112978

## About the Role

* 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.

## Description

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., 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.