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Mechanical Engineer Intern (Year-Round)

Charter Manufacturing · Saukville, WI · Part time

Posted Sep 18, 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 an engineering project where you designed or improved something physical. What did you do yourself?

What they are checking: Whether they have hands-on project experience they can explain clearly and own.

Tell me about a time you managed your own project timeline. Did you hit it?

What they are checking: Project management skill, which the internship says interns will build and use.

How will you balance 15 to 20 hours a week with your classes?

What they are checking: Reliability and time management for a year-round, part-time internship.

Tell me about a time you had to explain a technical idea to someone outside engineering.

What they are checking: Communication skill across maintenance, quality and production teams.

What would you do

How would you approach a project to make a piece of equipment in a steel mill safer?

What they are checking: Practical safety thinking about guarding, access and maintenance in a heavy industrial setting.

How would you work with maintenance technicians who have been fixing this equipment for 20 years?

What they are checking: Humility and respect for floor experience, which makes interns effective in a plant.

About the work

What CAD tools have you used, and what have you modeled?

What they are checking: Whether they can produce drawings and models that support equipment upgrades.

A machine keeps breaking the same part. How would you figure out why?

What they are checking: Root cause thinking that considers loads, materials, wear and how the machine is operated.

What do you know about how steel bar and rod are made?

What they are checking: Curiosity and preparation about the process they will be working around.

How would you estimate whether an equipment upgrade is worth the cost?

What they are checking: Basic engineering economics, which helps an intern's projects get approved.

Practice this interview out loud.

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The full job description

As published by Charter Manufacturing.

Charter Manufacturing is a fourth-generation family-owned business where our will to grow drives us to do it better. Join the team and become part of our family! Charter Steel is a leading American supplier of carbon and alloy steel bar, rod and wire products, and the largest steel coil processor in North America. As a fully integrated steelmaker with locations in Ohio and Wisconsin, Charter Steel offers a full range of grade and size coiled products and vast technical service experience. Charter Steel is a member of the Charter Manufacturing   family of companies. About the Mechanical Engineering Internship: The Mechanical Engineering Intern will gain hands-on experience in a fast-paced manufacturing environment while building technical knowledge across engineering, maintenance, quality, and production. You’ll support and lead projects focused on process improvements, safety enhancements, and equipment upgrades while developing valuable problem-solving, collaboration, and project management skills. Program structure: • Schedule: Part-time (15-20 hours/week) during the academic year and full-time (40 hours/week) during the summer. • Location: Saukville, WI • Start Date: May 2027 • Duration: Year-round internship What we're looking for: • Enrollment in a four-year degree program in Mechanical Engineering, Industrial Engineering, Manufacturing Engineering or a related field. • Cumulative GPA of 2.75 or higher. • Proficient in Microsoft Office software: Excel, Word, and PowerPoint • Strong verbal and written communication skills • Strong interpersonal and relationship building skills. • Ability to succeed in a team environment. • Ability to handle multiple tasks. Preferred experience: • Advanced Excel and analyst skills. • AutoCAD experience. • Exposure to Lean manufacturing and Continuous Improvement Tools. What you'll focus on: • Create and update engineering drawings to support equipment and process needs. • Support plant-wide safety and ergonomic improvement projects. • Lead process improvement projects from initial concept through implementation and completion. • Collaborate with Engineering, Operations, and other internal teams to execute projects. • Work with contractors and suppliers to coordinate project needs and solutions. • Gain hands-on exposure to mechanical engineering in a manufacturing environment. What Sets Our Internship Program Apart: Work on meaningful projects while receiving mentorship, professional development, and networking opportunities that help launch your career. Our paid internship program also includes signature experiences like Charter's Intern Kickoff Day, volunteer opportunities, professional development workshops, and the Intern Summer Showcase. #LI-AF1 #LI-Onsite #CharterSteel Internship positions are not benefits-eligible.

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