Jobs › Plexus

Intern - Product 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 time you took a project from an idea to something physical.

What they are checking: Whether they have hands-on build experience and understand the gap between design and reality.

Tell me about a time you used data to make a decision on a project.

What they are checking: Whether they base conclusions on evidence rather than assumptions.

How do you manage your time when several people need things from you at once?

What they are checking: Whether they can prioritize and communicate in a fast-moving manufacturing environment.

What do you want to accomplish during your fall co-op?

What they are checking: Whether they have clear goals and will drive their own development.

What would you do

A product is failing at a high rate on the line. How would you start investigating?

What they are checking: Whether they can approach a production problem with a structured method.

How would you communicate an issue to a customer's engineering team?

What they are checking: Whether they can write and speak clearly and professionally to external engineers.

About the work

What do you think a product engineer does at a contract manufacturer like Plexus?

What they are checking: Whether they understand that product engineers bridge the customer's design and production on the floor.

How would you read a bill of materials and spot a problem before production starts?

What they are checking: Whether they can review documentation carefully for missing or wrong parts.

What is design for manufacturability, and can you give an example of a design choice that makes building harder?

What they are checking: Whether they understand how design decisions affect cost, quality and assembly.

What is an engineering change order, and why must it be tightly controlled?

What they are checking: Whether they understand that building the wrong revision can cause recalls in regulated industries.

Practice this interview out loud.

Offer builds a real interview for this exact role at Plexus from your resume and this job description, asks the questions one at a time, and tells you what landed. The first one is free.

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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 The role of the Product Intern is to participate in and lead appropriately scoped supporting processes, using classical manufacturing engineering skills. This position will focus on manufacturing process development in Surface Mount or Electro Mechanical assembly areas. The goal will be to develop sound and repeatable processes that maximize employee safety, product yield, and process efficiency. The individual will collaborate with other engineers at the Focus Factory, Site, and Corporate level to achieve project objectives. All interns will be assigned a mentor for direction and support. RESPONSIBILITIES • Support, recognize, define, and solve problems/opportunities within the Factory. • Support of manufacturing process, including layout and concepts. • Review labor quotes versus actual times and implement process improvements where opportunities arise. • Review Engineering Change Orders (ECO) and provide feedback on labor impact of change. • Gain understanding of manufacturing process controls and the statistical applications associated. • Assist with Manufacturing Readiness Reviews (MRR's). • Develop knowledge of Plexus Design for Manufacturing (DFM) Guidelines. • Assist with recommendations as to what format (e.g. tape-n-reel vs. bulk, etc.) to receive raw material in, to optimize the manufacturing process. • Assist in determining facility requirements (floor space, utilities, ancillary equipment, etc.) for new processes or equipment, adhering to safety and ergonomic practices. • Assist in process Validation activities, per SOP 37, as required. Participates on customer support teams, representing manufacturing and engineering. • Additional duties as assigned by Management. MINIMUM QUALIFICATIONS • Student working toward a Bachelor’s degree in Manufacturing Engineering, Mechanical Engineering or related field for entire duration of internship. • Experience in Solidworks, AutoCAD, and Lean Sigma • Proficient in Google Applications 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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