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Intern - Materials/Planning (Summer 2027)

Plexus · Neenah, WI · $22.00–$24.00 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 kept track of a lot of moving pieces at once. How did you stay organized?

What they are checking: Whether they have a real system for tracking details rather than relying on memory when the volume climbs.

Tell me about a time you made a mistake with numbers or data. How did you find it and what did you do?

What they are checking: Whether they own errors quickly, because in planning a hidden mistake turns into a shortage weeks later.

Describe a time you had to ask someone for information they were slow to give you. How did you get it?

What they are checking: Whether they follow up politely and persistently, since planners depend on buyers, engineers and the floor for answers.

What do you hope to learn this summer, and how would you know by August that the internship was worth it?

What they are checking: Whether they have real goals for the internship and will take ownership of their own learning.

What would you do

A build for a surgical system customer is scheduled next week, and one small resistor is short. Walk me through what you'd do first.

What they are checking: Whether they gather facts on quantity, lead time and alternates before raising an alarm or guessing at a fix.

A buyer tells you a part will be late, and production is asking you for a date. What do you tell production?

What they are checking: Whether they give an honest, sourced answer and a plan rather than a hopeful date they cannot back up.

About the work

What do you think a materials planner actually does all day at a contract manufacturer like Plexus?

What they are checking: Whether they understand planning means making sure the right parts arrive at the right time, not just ordering things.

Can you explain what a bill of materials is and why one wrong line on it causes trouble on the floor?

What they are checking: Whether they see how a single data error ripples into shortages, scrap or a stopped line.

How would you explain the difference between having too much inventory and having too little, and why both cost money?

What they are checking: Whether they grasp that excess stock ties up cash while shortages stop production, so balance is the real job.

How comfortable are you in Excel? Tell me about the most useful thing you've built or analyzed in a spreadsheet.

What they are checking: Whether they can actually work with large part lists and shortage reports, since planning runs on spreadsheet skill.

Plexus builds for aerospace, healthcare and industrial customers. Why might planning for a defense product feel different from planning for an industrial one?

What they are checking: Whether they can reason that regulated, low-volume products often have longer lead times and less room for substitutes.

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: $22 - $24/hr. OVERVIEW Responsible for coordinating customer expectations with organizational objectives by developing schedules that align with both stakeholder requirements and feasibility, ensuring a balance that enhances customer satisfaction while meeting organizational goals. RESPONSIBILITIES • Customer demand receipt and order acknowledgment. • Creation of what-if scenarios to simulate demand change impact. • Create and maintain a feasible Master Production Schedule, and liaise with Production Planning to execute a plan which results in product shipping on-time. • Highlight and escalate any area of the business which may impact Customer Service Excellence with regard to product delivery. • Able to resolve challenges through detailed instruction, policy and procedures. MINIMUM QUALIFICATIONS • Student working toward a Bachelor’s degree in Business or Supply Chain Management 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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