Injection Molding Production Supervisor

Picture the start of your week at our Warren, MI facility: you walk the floor, greet a cross-functional team that trusts your judgment, and scan the boards to verify the plan for D Shift is locked in. You confirm labor alignment, spot-check a mold change, and coach a tech through an adjustment to keep quality on target. By mid-shift, you’ve validated safety checks, updated production notes, and huddled with Quality and Engineering to solve a materials variance—keeping throughput on track and costs in check.

MMI is a plastic injection molding and engineering solutions company headquartered in Saline, Michigan, with additional offices in Troy, Warren, and Monterrey, Mexico. We provide engineering solutions for advanced composites and engineered resins across multiple industries. Our mission: Deliver a Quality Product, On Time, at a Competitive Price. We value an inclusive, friendly culture where collaboration fuels innovation.

We’re hiring a hands-on leader to guide shift operations on the manufacturing floor in Warren, MI. You will champion safety, quality, and performance while coordinating closely with Scheduling, Engineering, and Quality.

Monday–Wednesday, 12:00am–6:15am and Thursday/Friday or Saturday/Sunday, 6:00pm–6:15am.

• Lead and support team members to achieve safety, quality, and production targets.
• Deploy labor, manage mold changes, and set up the floor to meet the production plan.
• Ensure adherence to standardized work, quality verifications, and all safety policies.
• Oversee setup and operation of injection molding machines and auxiliary systems.
• Track performance; escalate issues that risk output, quality, or cost.
• Drive 5S and lean practices to maintain an orderly, efficient workplace.
• Troubleshoot process, equipment, and material issues in real time.
• Maintain complete documentation and clear shift-to-shift communication.

• 3–5 years of supervisory experience in an injection molding environment.
• Strong command of molding variables (pressure, heat, material flow).
• Proven people leadership: coaching, feedback, and team development.
• Mechanical/process troubleshooting and problem-solving strengths.
• Microsoft Office proficiency (Excel, Outlook, Word); IQMS ERP experience is a plus.
• Clear communicator of standards, procedures, and expectations.
• Excellent organization and attention to detail in a fast-paced setting.
• Experience managing team timecards.
• Maintenance background in plastic injection molding preferred.

• Significant physical activity: frequent reaching, lifting, extended standing (7 hours), walking, and stepping in/out of equipment.
• Typical manufacturing setting—can be hot, noisy, and dusty.
• Authority to take corrective action when processes or safety rules are not followed.
• Empowered to stop production if parts do not meet quality standards.

• Comprehensive benefits: Medical, Dental, Vision, Company-Paid Short- and Long-Term Disability, robust Wellness Program, tuition reimbursement, and a 401(k) with company match.
• Three (3) weeks of Paid Time Off (PTO).
• Up to ten (10) paid holidays, including one diversity holiday.
• Perfect Attendance and Employee Referral Bonuses (up to $200 per referral).
• Career growth and training opportunities for energetic, career-minded individuals.

Join our team and help us deliver dependable service and operational excellence to our customers.