Senior Production Planner - MRP, S&OP & Lean

Marmon Holdings; Bellows Falls (VT); On-site; USD 68,000 - 102,000; Full time

Benefits offered by this job

Medical insurance

Dental insurance

Vision care

401k matching

Job summary

Sonnax Transmission Company, part of Marmon Holdings, is seeking a Senior Planner to develop and maintain production plans that support manufacturing operations and customer demand. You will balance supply and demand using MRP systems and coordinate with Purchasing and Manufacturing to ensure on‑time delivery.

The role emphasizes forecasting accuracy, inventory optimization, and continuous improvement through Lean practices, with opportunities to impact production efficiency and cross‑functional

Qualifications

• 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.

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.

Skills

Production planning

Production scheduling

Material planning

Supply chain

Lean methodologies

Education

Bachelor's degree

Tools

Epicor Kinetic

Job description

Sonnax Transmission Company, part of Marmon Holdings, is seeking a Senior Planner to develop and maintain production plans that support manufacturing operations and customer demand. You will balance supply and demand using MRP systems and coordinate with Purchasing and Manufacturing to ensure on‑time delivery.

The role emphasizes forecasting accuracy, inventory optimization, and continuous improvement through Lean practices, with opportunities to impact production efficiency and cross‑functional