Amkor Technology Vietnam, LLC is hiring a Production Planner in Bac Ninh. Full-time, mid-level position in semiconductor manufacturing. Position Summary: The Planner translates customer demand into executable manufacturing plans, ensuring on-time delivery by coordinating materials, production schedules, capacity, and shipments. The role serves as a key interface between customers and internal functions including Production, Engineering, Procurement, Logistics, Quality, and Customer Service. Key Responsibilities: - Production Planning and Scheduling: Develop and maintain daily, weekly, and monthly production plans based on customer forecasts, purchase orders, and factory capacity; monitor production loading and optimize capacity utilization; create and manage production schedules in SAP, EMES, and related systems; coordinate schedule changes and expedite activities for customer priorities; ensure production readiness prior to manufacturing release. - Demand and Order Management: Review customer forecasts and purchase orders for demand accuracy; convert customer demand into executable manufacturing plans; track demand fluctuations and communicate risks to management; support customer delivery commitments and shipment planning. - Material Planning and Readiness: Monitor material availability against production requirements; coordinate with Procurement to resolve shortages; review BOM requirements and support material allocation; track customer-owned materials and inventory status. - WIP and Factory Performance Monitoring: Monitor WIP movement and cycle time; identify bottlenecks and coordinate corrective actions; drive recovery plans for schedule misses and capacity constraints; maintain production performance reports and KPIs. - Shipment and Customer Support: Coordinate finished goods shipment schedules with Logistics and Customer Service; ensure on-time delivery performance; support customer meetings, escalations, and business reviews; respond to customer inquiries regarding delivery, inventory, and production. - Cross-Functional Coordination: Work with Manufacturing, Engineering, Quality, Procurement, Logistics, and Customer Service; support new product ramp-up, line transfers, capacity expansion, and business continuity; participate in continuous improvement initiatives. Qualifications: - Bachelor's degree in Industrial Engineering, Supply Chain Management, Business Administration, or a related field. - 4+ years of experience in production planning, scheduling, supply chain, or semiconductor manufacturing preferred. - Strong analytical and problem-solving skills. - Proficiency in Excel, ERP systems (SAP preferred), and production planning tools. - Professional at Korean; good communication skills in English. - Ability to work in a fast-paced, cross-functional manufacturing environment.