Molding Process Engineering Co-op

Job Posting Start Date 02-22-2026 Job Posting End Date 02-27-2026<p style="text-align:inherit"></p><p style="text-align:inherit"></p>Flex is the diversified manufacturing partner of choice that helps market-leading brands design, build and deliver innovative products that improve the world.<p style="text-align:inherit"></p><p style="text-align:inherit"></p>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.<p style="text-align:inherit"></p><p style="text-align:inherit"></p><h2>Job Summary</h2><p><span>To support our extraordinary teams who build great products and contribute to our growth, this Summer, we’re looking to add a </span><b><span>Molding Process Engineering Co-Op</span></b> <span>located in our </span><b><span>Libertyville, IL</span></b><span> site.</span></p><p></p><p><span>Reporting to</span><b><span> Process &amp; Automation Engineering Team,</span></b> <span>the Intern will support injection molding process development and validation activities for high-precision medical components, while collaborating and working alongside Engineers and cross-functional teams. </span></p><p></p><p><b><span>What a typical day looks like:</span></b></p><ul><li><span>Assist in injection mold trials and process window development</span></li><li><span>Support startup optimization and parameter validation</span></li><li><span>Perform short-shot and imbalance studies</span></li><li><span>Support defect analysis and root cause investigations</span></li><li><span>Assist with IQ/OQ/PQ documentation</span></li><li><span>Support tooling PM and mold performance assessments</span></li><li><span>Attend team meetings to support project work as needed</span></li></ul><p></p><p><b>Student qualities we’re seeking for this internship assignment:</b></p><ul><li>Junior/Senior student pursuing Bachelors degree in Plastics Engineering, Polymer Engineering, Mechanical Engineering, or Materials Science major</li><li>Understanding of Injection Molding Process (injection molding fundamentals)</li><li>Basic process validation knowledge in highly regulated environments</li><li>Defect &amp; root cause analysis experience</li><li>Understanding of mold tooling components and ability to read basic mechanical drawings</li><li>Strong documentation and communication skills</li><li>Previous manufacturing floor internship experience a plus!</li></ul><p></p><p><b>Co-Op Program Requirements:</b></p><ul><li>Ability to work 40 hours/week (in person) during the co-op assignment</li><li>Currently enrolled in 4-year accredited university</li><li>3.0 GPA</li></ul>Pay Range (Applicable to Illinois)<h3></h3><h3></h3>$16.74 USD - $23.02 USD Hourly<p style="text-align:inherit"></p><p style="text-align:inherit"></p><h2></h2><h2>Job Category</h2>Intern<p style="text-align:inherit"></p><p style="text-align:inherit"></p>Relocation: Not eligible<p style="text-align:inherit"></p><p style="text-align:inherit"></p><h2></h2><p style="text-align:inherit"></p><p style="text-align:left">Is Sponsorship Available?</p>No<p style="text-align:inherit"></p><p style="text-align:inherit"></p><p style="text-align:inherit"></p><p style="text-align:inherit"></p><p style="text-align:inherit"></p><p style="text-align:inherit"></p><p style="text-align:inherit"></p><p style="text-align:inherit"></p>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).