OfferDrill.

Jobs › Flex

Mechanical Engineering Co-Op - Spring 2027

Flex · Libertyville, IL · $27.50–$44.50 an hour · Full time

Posted Sep 18, 2026 · We last checked this listing on Oct 6, 2026

Apply at Flex

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 had to learn something technical quickly with little guidance.

What they are checking: Whether they take initiative to learn, which matters a lot for a co-op who joins mid-project.

Describe a time you wrote a report or presented findings to a group. How did you make it clear?

What they are checking: Whether they can explain results simply, since reporting findings to the team is part of this co-op's job.

Tell me about a team project where people disagreed on the approach. What was your part?

What they are checking: Whether they can collaborate across a mix of engineers and cross-functional people without stalling or shutting down.

Why manufacturing, and why a co-op in a production environment rather than a pure design role?

What they are checking: Whether they genuinely want to be on a factory floor, which predicts how engaged they will be all semester.

What would you do

If you were asked to write work instructions for a machine operator, how would you make sure they actually get followed?

What they are checking: Whether they think about the operator's point of view, since instructions nobody can follow do not prevent errors.

An engineer gives you a task and you realize halfway through that you misunderstood it. What do you do?

What they are checking: Whether they speak up early instead of hiding a mistake, which saves the team time and builds trust.

About the work

Tell me about a project, in class or on a team, where you used CAD. What did you design and what tool did you use?

What they are checking: Whether they have hands-on CAD experience they can talk about specifically, since reviewing drawings and CAD is daily work here.

Have you ever done a time study, or can you tell me how you would set one up on a manufacturing line?

What they are checking: Whether they understand how to measure a process fairly and repeatably, which is the base of most line improvements.

What is a design of experiments, and how would you help set one up for a process the team wants to improve?

What they are checking: Whether they grasp changing factors on purpose and measuring results, instead of tweaking one thing at a time by guess.

How would you go about researching and recommending a piece of support equipment for continuous production?

What they are checking: Whether they can weigh cost, reliability and fit with the line rather than just picking the first option found.

Practice this interview out loud.

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

Practice this out loud

The full job description

As published by Flex.

Flex is the diversified manufacturing partner of choice that helps market-leading brands design, build and deliver innovative products that improve the world. A career at Flex offers the opportunity to make a difference and invest in your growth in a respectful, inclusive, and collaborative environment. If you are excited about a role but don't meet every bullet point, we encourage you to apply and join us to create the extraordinary. Job Summary 

 To support our extraordinary teams who build great products and contribute to our growth, we’re looking to add a Mechanical Engineering Co-Op located in our Libertyville, IL site. Reporting to the Senior Process Engineering Manager, the student will assist with daily engineering tasks while learning, collaborating and working alongside Engineers and cross-functional teams. What a typical day looks like: • Assist Engineering Team with time studies, reviewing documentation, drawings and CAD • Assist in writing working instructions, check list and other documents related to manufacturing equipment • Help research and recommend support equipment required for continuous production • Help design and monitor Engineering DOE (Design Of Experiment) projects • Collaborate with Engineering Team with writing reports and reporting findings to team • Attend team meetings and support project work as needed Student qualities we’re seeking for this Co-Op assignment: • Current BS/MS student pursuing Mechanical Engineering major • 2D and 3D CAD tools (AutoCAD, Inventor or Solidworks) experience • Lean/Six Sigma helpful • Enthusiastic about working in a manufacturing environment • Highly collaborative, creative and excellent communication skills • Previous co-op/internship experience a plus! Co-Op Program Requirements: • Available to work 40 hours/week (in-person) for the Spring 2027 co-op assignment • Currently enrolled in 4-year accredited university • 3.0 minimum GPA 

 Application Deadline: Applications for this job position will be accepted for at least five days following the job posting start date below and continuing until the end date below or until the position is filled. This posting may close sooner due to application volume. Job Posting Start Date 09-18-2026 Job Posting End Date

 The base pay range for this position is provided below. The final base rate offered will be determined using job-related, non-discriminatory criteria, including but not limited to experience, qualifications, geographic location, education, external market data, and internal equity. Pay Range $27.50 - $44.50 Hourly Job Category Intern Relocation: Not eligible Is Sponsorship Available? No Flex is an Equal Opportunity Employer and employment selection decisions are based on merit, qualifications, and abilities. We do not discriminate based on: age, race, religion, color, sex, national origin, marital status, sexual orientation, gender identity, veteran status, disability, pregnancy status, or any other status protected by law. We're happy to provide reasonable accommodations to those with a disability for assistance in the application process. Please email accessibility@flex.com and we'll discuss your specific situation and next steps (NOTE: this email does not accept or consider resumes or applications. This is only for disability assistance. To be considered for a position at Flex, you must complete the application process first).

Apply at Flex