Planner Buyer

Owens Corning; Corona (CA); On-site; USD 60,000 - 90,000; Full time

Job summary

Owens Corning is seeking a Planner Buyer in Corona, CA to plan and purchase materials, ensuring on-time production while balancing costs and stock levels. The role coordinates with production, warehouse, and engineering teams to optimize inventory and supplier performance on site.

Responsibilities include managing lead times, safety stock, and purchase orders from requisition through receipt, while tracking metrics and driving improvements in inventory turns and availability.

Qualifications

• Experience planning, purchasing, and controlling inventory to support production schedules.
• Proven ability to balance service levels, cost, supplier performance and inventory.
• Familiarity with demand forecasts, MRP, purchasing processes and data accuracy.

Responsibilities

• Plan and purchase materials, components, finished goods, and supplies to meet production and operational demand.
• Monitor daily inventory levels to maintain stock availability while minimizing excess and obsolete inventory.
• Review MRP outputs, forecasts, min/max levels, safety stock, reorder points, lead times and open POs for accuracy.
• Convert approved requisitions or planning recommendations into purchase orders and manage through receipt.
• Expedite, defer, cancel, or adjust orders based on demand and priority changes.
• Collaborate with production, warehouse, customer service, sales, engineering, quality and finance teams.
• Identify potential shortages or disruptions and communicate risks with corrective actions.
• Maintain accurate planning data, including supplier lead times, pricing, quantities, and item master data.
• Support cycle counts, physical inventories, root-cause analysis and reconciliation of discrepancies.
• Monitor supplier delivery performance, resolve delays, address quality issues, and negotiate pricing.
• Recommend inventory control improvements to reduce costs and improve turns.
• Track key purchasing and inventory metrics such as turns, stockouts, and on-time delivery.

Skills

Planning

Purchasing

Inventory control

Demand forecasting

MRP

Supplier management

Cross-functional collaboration

Vendor negotiation

Tools

ERP systems

Job description

Planner Buyer

Location: Corona, CA, 92879

Function: Manufacturing

Audience: Hourly

Work Arrangement: On Site

Requisition ID: 69770

The Planner Buyer is responsible for planning, purchasing, and controlling inventory to ensure materials, components, and supplies are available to support production schedules, customer requirements, and operational needs. This role balances service levels, cost, supplier performance, and inventory investment by using demand forecasts, material requirements planning, purchasing processes, and inventory control practices to prevent shortages, reduce excess stock, and improve overall supply chain efficiency.

Essential Duties and Responsibilities

• Plan and purchase assigned materials, components, finished goods, and supplies to meet production, customer, and operational demand.
• Monitor inventory levels daily to maintain appropriate stock availability while minimizing excess, obsolete, and slow-moving inventory.
• Review material requirements planning outputs, demand forecasts, min/max levels, safety stock, reorder points, lead times, and open purchase orders to ensure inventory accuracy and continuity of supply.
• Convert approved requisitions or planning recommendations into purchase orders and follow through from order placement to receipt.
• Expedite, defer, cancel, or adjust purchase orders based on changing demand, supplier performance, inventory position, and production priorities.
• Partner with production, warehouse, customer service, sales, engineering, quality, and finance teams to align purchasing plans with business requirements.
• Identify potential shortages, supply disruptions, or inventory imbalances and communicate risks with recommended corrective actions.
• Maintain accurate planning and purchasing data, including supplier lead times, pricing, order quantities, safety stock, item master data, and inventory parameters.
• Support cycle counts, physical inventory activities, root-cause analysis, and reconciliation of inventory discrepancies.
• Analyze inventory trends, usage history, forecast accuracy, supplier reliability, and demand changes to improve inventory planning decisions.
• Work with suppliers to confirm delivery dates, resolve late shipments, address quality issues, negotiate pricing, and improve on-time delivery performance.
• Recommend inventory control improvements that reduce carrying costs, improve turns, prevent stockouts, and strengthen material availability.
• Track and report key purchasing and inventory metrics, including inventory turns, stockouts, excess inventory, supplier on-time delivery, purchase price variance, and order accuracy.
• Ensure purchasing activities comply with company policies, approval requirements, ethical standards, and applicable regulations.