Purpose: Customer Buyer is responsible to strategically manage the supply chain during the whole lifecycle of an assigned customer program. This includes supplier selection based on Total Cost of Ownership, managing and negotiating material cost and securing customer kit availability. The Customer Buyer engages in expediting, assurance of security of supply and inventory control (optimize cash flow) of the assigned critical components. Main responsabilities Project Sourcing :  Provide the material cost calculation, select suppliers and define and develop the best supply chain setup in scope of the assigned customer program. Mitigate risk and, for the critical components, decide upon optimal order quantities, drive price-benchmarks and place POs. Expedite delivery, manage pull-in, push-out, cancellation and record the status updates in SAP. Material Cost Management and Controlling: Deliver benchmark material cost for winning or defending business. Generate cost reduction opportunities and utilize strategically preferred suppliers. Control material cost development and engage in benchmarks, price negotiations and potential alternative sources. Supply Chain Management: Advising customers on optimal supply chains and project-specific sourcing strategies as sales support and customer loyalty measure, Responsibility for all assigned customer materials including after sales, ensure best price / material for customer project. Supplier Management: Utilizing the strategically preferred supplier portfolio for supplier selection, engage in price negotiations and potential second sources within existing supplier network, enhance network with suppliers, qualification of new suppliers in coordination with Quality Assurance and Global Procurement. Master Data Maintenance: Since a BOM splits in critical and uncritical components, initially, support SAP utilization through continuous master data maintenance for all critical components (e.g. purchasing conditions, packaging, lead time). In case of decreased criticality of components, use the workflow to change assignment to Factory Procurement.