Senior Planner​/Buyer - Manufacturing

Join Mac Lean-Fogg’s Engineered Plastics Company in Menomonee Falls, a growing manufacturer of close-tolerance engineered plastic components supporting leading automotive and industrial customers. Our Wisconsin operations specialize in advanced injection molding, insert molding, automation, and complex functional components within a quality-driven manufacturing environment.

We are seeking a Senior Planner/Buyer who brings strong materials and production planning expertise to help drive operational performance, inventory optimization, and supply continuity. This role is planning-focused, with purchasing responsibilities supporting overall material flow and production execution.

This position also offers long-term growth potential for a high-performing supply chain professional interested in developing into future Materials Management leadership opportunities.

• Lead production and materials planning activities to support customer delivery and operational performance.
• Manage inventory levels, forecasts, production schedules, and material availability through ERP/MRP systems.
• Coordinate with operations, production, customer service, and suppliers to resolve shortages and scheduling challenges.
• Support purchasing activities including purchase orders, supplier communication, and delivery management.
• Analyze planning and inventory data to improve schedule accuracy, inventory performance, and material flow.
• Support Sales & Operations Planning (S&OP) and continuous improvement initiatives.
• Build strong supplier and cross-functional relationships to support long-term operational success.

• Bachelor’s degree in Supply Chain Management, Business, Operations, Manufacturing, or a related field.
• 4 to 6+ years of experience in a Senior Planner, Materials Planner, Production Planner, Buyer Planner, Supply Chain Planner, or related manufacturing supply chain role.
• Strong expertise in production planning, materials planning, inventory control, forecasting, and supply chain execution.
• Working knowledge of purchasing, procurement coordination, and supplier management.
• Experience working with ERP/MRP systems in a manufacturing setting.
• Ability to analyze data, prioritize competing demands, and make sound operational decisions.
• Strong communication and collaboration skills across cross-functional teams.
• Proficiency with Microsoft Excel and reporting tools.
• Experience managing supplier performance, purchase orders, and delivery schedules.

• APICS/CPIM, CSCP, CPSM, or related certification.
• Experience in automotive, plastics, injection molding, or engineered manufacturing environments.
• Knowledge of lean manufacturing, inventory optimization, or continuous improvement practices.
• Advanced ERP, MRP, or supply chain analytics experience.