Jobs › Plexus

Intern - Test Engineer (Summer 2027)

Plexus · Buffalo Grove, IL · $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 lab or project where you tested hardware. What did you measure and why?

What they are checking: Whether they have hands-on test experience and understand the purpose behind measurements.

Tell me about a time you had to learn a new tool or instrument quickly.

What they are checking: Whether they can ramp up fast in a lab environment with new equipment.

What do you want to learn about test engineering this summer?

What they are checking: Whether they have clear goals and genuine interest in the work.

What would you do

A test keeps failing good boards about one time in twenty. How would you investigate?

What they are checking: Whether they think about test repeatability, fixture contact and limits rather than blaming the board.

How would you talk to a technician who says your test procedure is confusing?

What they are checking: Whether they take feedback from the floor and improve their work.

About the work

How would you design a test to check that a power supply board meets its specs?

What they are checking: Whether they can turn requirements into measurable test steps with limits.

What programming have you done for test automation, like Python, LabVIEW or TestStand?

What they are checking: Whether they can write code to control instruments and automate tests.

What is the difference between finding a defect in manufacturing test and validating a design?

What they are checking: Whether they understand that production test screens for build errors, not design flaws.

How do you set pass and fail limits for a measurement?

What they are checking: Whether they understand that limits balance catching defects against falsely rejecting good units.

Why do medical and aerospace customers care so much about test records?

What they are checking: Whether they understand traceability and proof of compliance in regulated products.

Practice this interview out loud.

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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 As a Test Intern you would be specifically working on Automated Functional Test Equipment, Programming Software, and Hipot Test Equipment. As a programmer and developer for these systems you will be developing assembly specific test programs that will be used in the manufacturing process. Along with programming, you will need to interact with other personnel on the team including the team leader, other engineers and manufacturing technicians. RESPONSIBILITIES • Support the development (or installation) and sustains (ECO support) test and inspection programs for one or multiple manufacturing test platforms • Support the development of Specific Function Training, Assembly Build Instructions, or other training to support to operation of the equipment for the Operators or Manufacturing Test Technicians • Supports manufacturing Operators and manufacturing Technicians on troubleshooting and debugging test equipment, test software and product supporting root cause failure analysis • Support continuous improvement through data monitoring of yields or cost down opportunities • Work with planners and manufacturing Supervisors/Leads to support established production schedule priorities • Lead test/program acceptance • Lead calibration and preventative maintenance of equipment • Recognize problems from test procedures and/or test results and make appropriate recommendations • Able to work from specifications, technical manuals, schematics, and verbal or written instructions. • Able to compile and record test results. MINIMUM QUALIFICATIONS • Student working toward a Bachelor’s degree in Electrical Engineering, Electrical Engineering Technology or related Engineering field for entire duration of internship. PREFERRED QUALIFICATIONS • Junior level status • GPA: 3.0 or higher is preferred • Excellent analytical, problem solving, and organizational skills • Strong communication skills 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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