Warehouse/Flex Supervisor
Mmi Engineered Solutions, Inc.
People & HR, Operations
Saline, MI, USA
Posted on Dec 11, 2025
MMI Engineered Solutions is seeking a Flex & Warehouse Supervisor to join our Operations team. In this role, you will oversee the Assembly, Shipping, and Warehouse functions while also providing flexible supervisory coverage for production shifts as needed. You'll ensure materials flow efficiently, production and shipping schedules are met, and quality standards are maintained across all areas. Your leadership will directly impact operational performance, safety, and customer satisfaction.
Key Responsibilities
Warehouse Leadership:
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Supervise and develop warehouse personnel to maintain a motivated, efficient, and skilled workforce.
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Oversee freight scheduling to ensure on-time delivery and fulfillment of customer commitments.
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Assist in managing warehouse inventory, including raw materials, finished goods, and WIP.
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Monitor inventory levels to ensure product availability for production and sales.
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Ensure warehouse maintenance, organization, and security.
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Lead and support daily activities within the Assembly and Shipping departments.
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Maintain 5S and workplace organization across warehouse areas.
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Achieve shipping schedule attainment.
Flex Production Supervison:
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Provide supervisory coverage for any production shift when needed, including short-notice or extended coverage.
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Oversee mold changes and coordinate with Process Techs, Mold Setters, and Material Handlers.
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Adjust labor allocation based on production demands.
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Support, guide, and direct Mold Setters, Press Operators, and other production personnel.
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Set up production work cells, including reviewing work orders and preparing quality documentation.
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Verify first-piece inspection and ensure all parts meet dimensional and quality standards.
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Ensure operators follow documented processes, safety procedures, and quality system requirements.
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Provide daily production reporting and communicate issues impacting quality, cost, or output.
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Identify and correct nonconforming conditions, setup issues, or equipment concerns.
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Oversee injection molding equipment and auxiliary systems (robot pickers, water heaters, conveyors, chillers, dryers, etc.).
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Maintain a clean, safe, and organized production environment.
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Promote and lead safe work practices and continuous improvement activities.
Qualifications:
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3–5 years of supervisory experience in injection molding, warehousing, or a manufacturing environment.
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Strong problem-solving and reasoning skills.
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Solid understanding of warehouse logistics and injection molding processes.
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Ability to explain mechanical concepts such as pressure, force, heat transfer, and fluid flow.
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Proficiency in Microsoft Office (Excel, Outlook, Word); IQMS experience is a plus.
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Demonstrated success in coaching, motivating, and developing employees.
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Experience providing performance feedback, supporting training needs, and addressing disciplinary actions.
Work Environment & Expectations:
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Hands-on work in manufacturing, warehouse, and production environments.
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Extended periods of standing, walking, and working around heat, noise, and moving equipment.
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Must be flexible and comfortable supervising multiple departments with shifting priorities.
Why Work at MMI?
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A rich Benefits Package including Medical, Dental, Vision, Long and Short-Term Disability (Company Paid), a robust Wellness Program, tuition reimbursement, and a 401(k) Retirement Plan with matching.
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PTO
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Up to Ten (10) paid holidays (including one diversity holiday)
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Perfect Attendance and Employee Referral Bonus opportunities (up to $200 per referral)
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Opportunities for growth and job training for energetic, career-minded individuals.
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Located in Saline, MI just minutes from Planet Fitness, Emagine Saline, Briarwood Mall, Costco, and hundreds of local businesses!
Who We Are:
MMI is a plastic injection molding and engineering solutions provider headquartered in Saline, Michigan, with offices in Troy, Warren, and Monterrey, Mexico. We specialize in delivering engineering solutions for advanced composites and engineered resins across diverse industries.
Our mission is simple: Deliver a Quality Product, On Time, at a Competitive Price.
We are committed to fostering an inclusive, welcoming workplace where innovation thrives and collaboration is at the heart of everything we do.
Bring your leadership, problem-solving skills, and operational expertise to MMI as a Flex & Warehouse Supervisor. Help us drive efficiency, support production excellence, and deliver quality products that keep our customers moving forward.
MMI Engineered Solutions is an Equal Opportunity Employer.