Jobs › Plexus

Intern - Digital Engineer (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 digital logic or circuit design project you have worked on.

What they are checking: Whether they have hands-on digital design experience they can explain clearly.

Tell me about a time you worked with teammates from different engineering disciplines.

What they are checking: Whether they can collaborate across mechanical, software and electrical teams.

What part of digital engineering do you most want to explore during this internship?

What they are checking: Whether they have direction and will take initiative in their learning.

What would you do

Walk me through how you would bring up a new board with a microcontroller or FPGA for the first time.

What they are checking: Whether they think through power, clocks and basic checks before deeper debugging.

You are debugging a board and the problem could be hardware or firmware. How do you narrow it down?

What they are checking: Whether they isolate problems methodically across hardware and software.

About the work

Have you written Verilog or VHDL? Describe a module you designed and how you tested it.

What they are checking: Whether they can write and simulate HDL code for FPGA work.

What is a timing violation, and how would you fix setup time problems?

What they are checking: Whether they understand basic timing analysis in digital design.

How do you handle a signal crossing between two different clock domains?

What they are checking: Whether they know about metastability and synchronizers, which cause real hardware bugs.

What is the difference between I2C, SPI and UART, and when would you choose each?

What they are checking: Whether they know the common board-level communication protocols they will meet on real hardware.

What lab equipment have you used, like oscilloscopes or logic analyzers?

What they are checking: Whether they can measure and debug real digital signals.

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 To develop hardware and system concepts that satisfy our customers' requirements. RESPONSIBILITIES • Implement and verify the hardware design by using the appropriate EDA tools • Deliver prototype hardware to customers by implementing physical hardware design components, capturing schematics and supervising PCB layouts • Develop project documentation in accordance with quality and change management procedures and guidelines to ensure project information is properly organized and archived • Participate in performance review to ensure employee continuous improvement and growth • Utilize schematic capture tools and guide printed circuit board layout • Analyze circuit designs with simulation tools such as SPICE and finite element tools • Perform hands-on, in-the-lab, troubleshooting and bring up of prototype hardware • Take detailed measurements of analog hardware using standard electrical measurement tools including oscilloscopes, multimeters, spectrum analyzers, and network analyzers to assess circuit performance and inform design improvements • Work as a team with other analog, digital, software, and mechanical engineers to review and improve hardware designs • Receive expert mentorship, guidance, and coaching from experienced hardware engineers MINIMUM QUALIFICATIONS • Student working toward a Bachelor’s degree in Electrical/Electronics/Computer Engineering for the entire duration of internship. PREFERRED QUALIFICATIONS • Sophomore or Junior level status • GPA: 3.0 or higher is preferred • Relevant course work in FPGA design and test benching (VHDL / Verilog / System Verilog) or Circuit Design and Layout 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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