Senior Planner

As a part of the global industrial organization Marmon Holdings, Sonnax is a leading provider of innovative transmission and drivetrain solutions, serving the automotive aftermarket with high-quality products and engineering expertise. The Senior Planner develops and maintains production plans that support manufacturing operations, material availability, and customer demand. This role uses Material Requirements Planning (MRP) systems to balance supply and demand, coordinate with Purchasing and Manufacturing, and manage production schedules to ensure timely delivery and efficient inventory management.

Responsibilities

Develop and maintain production plans, firm scheduling horizons, and production schedules to support operational efficiency and customer requirements; Support Sales and Operations Planning (S&OP) and Sales and Operations Execution processes; Analyze inventory levels, product demand, reorder points, economic order quantities, and safety stock to balance product availability with inventory costs; Partner with Sales, Product Line Management, Marketing, Purchasing, and Manufacturing to improve forecast accuracy, material availability, and on-time delivery; Monitor material supply and demand, evaluate MRP and Master Production Schedule (MPS) exception messages, and coordinate necessary schedule adjustments; Balance customer requirements with manufacturing capacity, material availability, and other production constraints; Coordinate subcontracted services and products, including supplier communication, order execution, and performance expectations; Evaluate insourcing and outsourcing options based on customer needs, production capacity, and internal constraints; Assess material and capacity requirements for new product introductions, including bills of material, cut-in dates, and build verification; Track backorders, communicate status updates, and work with department leaders to resolve scheduling issues; Manage the review and approval workflow for existing product customer forecast changes in Monday.com; Lead quarterly and semiannual internal forecast reviews for existing products; Support continuous improvement and Lean initiatives to improve planning processes, production efficiency, and cross-functional collaboration; Perform other duties as assigned

Requirements

Bachelor's degree preferred, with six or more years of experience in manufacturing planning, production scheduling, material planning, or supply chain; Experience in production planning, material requirements planning, inventory management, and production scheduling; Strong analytical, organizational, communication, and problem-solving skills, with attention to detail; Ability to collaborate effectively across Manufacturing, Purchasing, Sales, and other cross-functional teams; Proficiency in Microsoft Office, particularly Excel and Outlook; Ability to work in manufacturing environments and wear required personal protective equipment, including safety eyewear and steel-toed shoes

Nice to have

Experience with precision metal fabrication, industrial products, or machined assemblies; Familiarity with Epicor Kinetic or similar manufacturing ERP systems; Knowledge of continuous improvement, Six Sigma, or Lean methodologies; relevant certification is a plus

Benefits

Comprehensive benefits package that may include medical, dental, vision, 401k matching, and more; Opportunity to influence production planning, inventory management, and manufacturing performance; Exposure to cross-functional operations spanning manufacturing, purchasing, sales, and supply chain; Opportunity to drive continuous improvement initiatives that support operational efficiency and customer satisfaction