About the role#
Flex is hiring an Automation/Controls Engineering Co-Op for our site in Libertyville, Illinois. You will report to the Process and Automation Engineering team and work alongside engineers to support PLC-based automation systems. This role focuses on molding, coiling, and buffer integration projects.
What you'll do#
- Assist with PLC testing and troubleshooting.
- Support the preparation and execution of FAT/SAT procedures.
- Troubleshoot sensors, actuators, and HMIs.
- Support automation documentation and architecture reviews.
- Validate buffer timing logic and perform system re-testing.
- Attend team meetings to support ongoing project work.
What you'll need#
- Current enrollment in a 4-year accredited university pursuing a BS in Electrical Engineering, Mechatronics, or Automation Engineering.
- A minimum 3.0 GPA.
- Basic knowledge of PLCs, industrial sensors, actuators, and HMIs.
- Ability to read electrical schematics and understand control panels.
- Familiarity with automation architecture and timing or sequence logic.
- Understanding of FAT/SAT testing and system validation concepts.
- Strong documentation, troubleshooting, and teamwork skills.
- Previous manufacturing floor internship or co-op experience is a plus.
Location & details#
- Location: Libertyville, Illinois.
- Term: Winter 2027.
- Schedule: Full-time, 40 hours per week, on-site.
- Compensation: This is a paid position.
- Note: Sponsorship is not available for this role.
About Flex
Flex is a manufacturing partner that provides design, build, and logistics services for various brands. The company operates across sectors including medical, automotive, and consumer digital electronics. It maintains a global presence with headquarters in Austin, Texas. The firm employs over 56,000 people and functions as a public company.
How to get in at Flex
Securing an internship at Flex requires speed because high-volume manufacturing firms often receive a large number of applications. Intern Insider sends an instant alert the moment a role matching your target is published, so you apply among the first. Early applicants get seen before the pile grows, which helps you stand out in a crowded field. You can also use Intern Insider to surface the recruiters behind these roles. Reaching out directly to ask about the position or a referral materially improves response rates compared to waiting in a queue.



