Jobs › Plexus

Intern - Functional Test (Summer 2027)

Plexus · Neenah, WI · $23.00–$27.00 an hour · Full time

Posted Sep 1, 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 you debugged something tricky, in school or on your own. What finally cracked it?

What they are checking: Whether they have patience and a method for hard problems, which is most of the job in test.

Tell me about a time you had to document your work so someone else could repeat it.

What they are checking: Whether they write clear records, since test results and procedures must be traceable for regulated customers.

What would you do

A board fails functional test. Walk me through how you'd start troubleshooting it.

What they are checking: Whether they work step by step from the failure data and measurements instead of swapping parts at random.

The test fixture says a unit fails, but you think the product might be fine. How would you tell which one is wrong?

What they are checking: Whether they suspect the test setup as well as the product, and use a known good unit to compare.

Production says test is the bottleneck. How would you look at speeding it up without weakening coverage?

What they are checking: Whether they can balance throughput against quality and find waste without cutting tests that catch real defects.

About the work

What's the difference between functional test and something like in-circuit test or visual inspection?

What they are checking: Whether they know functional test checks that the product actually works as designed, not just that parts are placed.

How comfortable are you with lab equipment like a multimeter, oscilloscope or power supply? Tell me how you've used them.

What they are checking: Whether they have real hands-on experience with the tools test engineers use every day on the floor.

What programming have you done, and could it be used to automate a test sequence?

What they are checking: Whether they can write or modify test scripts, since much functional test work is automating measurements and pass or fail checks.

Why does a false pass worry a test engineer more than a false fail?

What they are checking: Whether they understand a false pass ships a bad product to a customer, possibly a medical or aerospace one.

How do you stay safe working around powered electronics and test equipment?

What they are checking: Whether they take electrical safety and ESD precautions seriously rather than treating them as an afterthought.

Practice this interview out loud.

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Practice this out loud

The full job description

As published by Plexus.

About us: At Plexus, our vision is to help create the products that build a better world. Driven by a passion for excellence, we partner with leading Aerospace/Defense, Healthcare/Life Sciences and Industrial companies to design, manufacture and service some of the world’s most transformative products, including advanced surgical systems, diagnostic instruments, healthcare imaging equipment, mission critical aerospace systems, and electric vehicle (EV) charging solutions. Visit Plexus.com to learn more about our unwavering commitment to our vision. When we invest in our people, we invest in building a better world. With a vision rooted in the wellbeing and inclusive engagement of our team members, our customers, their end users and our communities, people are the heart of what we do and who we are. It is our values that unite us and guide us in everything that we do, including how we operate, behave and interact to foster a workplace where every team member feels valued and empowered to contribute their best. Our values include: Growing our People, Building Belonging, Innovating Responsibly, Delivering Excellence and Creating Customer Success. As a team member, you will engage in impactful work through global collaboration and the use of emerging technologies, join an inclusive culture where every team member is valued and working toward a greater purpose, and be empowered to reach your full potential through various development programs designed to accelerate your growth. Plexus offers a comprehensive benefits package designed to support team members' wellbeing, including medical, dental, and vision insurance, paid time off, retirement savings, and opportunities for professional development. We also prioritize work-life balance and offer a variety of perks to enhance the team member experience. For more information, visit our US benefits website at usbenefits.plexus.com . Our commitment to pay range transparency fosters an equitable workplace, where everyone can feel valued. This is an internship position (Non-Exempt Salary); the hourly range is stated below. The rate offered within this range will be based upon the geographic location, work experience, education, licensure requirements and/or skill level. Hourly Rate: $23 - $27/hr. OVERVIEW To add value to Plexus through the development of high quality test solutions that meet or exceed established expectations for test performance, cost and on time delivery RESPONSIBILITIES • Architect and design test solutions for product commercialization via analysis of test strategies and collaboration with internal and customer product development teams • Support electrical/mechanical fabrication by providing documentation and assistance to ensure high quality test solutions in a timely manner • Perform test solution debug and integration of electrical/mechanical/software components • Develop and execute design verification and validation procedure(s) to ensure implementation meets intended uses and requirements • Generate project documentation in accordance with quality and change management procedures and guidelines to ensure project information is properly organized and archived • Deliver and support controlled test solutions to customers MINIMUM QUALIFICATIONS • Student working toward a Bachelor’s degree in Computer Engineering, Software Engineering or Electrical Engineering for entire duration of internship. PREFERRED QUALIFICATIONS • Sophomore or Junior level status • GPA: 3.0 or higher is preferred • Excellent analytical, problem solving, and organizational skills • Strong communication skills • Utilization of common lab or electronic measuring equipment (i.e. multimeter, oscilloscope, etc.) via project or prior work experiences • Exposure to software/coding best practices. Working knowledge of a software language such as C++, Python, or other is a plus. • Mechatronics related experiences This document does not represent a contract of employment and is not intended to capture every possible assignment the incumbent could be asked to perform. We are pleased to provide reasonable accommodations to individuals with disabilities or special requirements. If you need an application accommodation, please contact us by email at GHQ.TA@plexus.com . Please include your contact information and clearly describe how we can help you. This email is for accommodation requests only and cannot be used to inquire about the status of applications. We are an Equal Opportunity Employer (EOE) and do not discriminate based on race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status. Some offers of employment are contingent upon successfully passing a drug screen and/or background check.

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