You are responsible for: - Participate in the strategic development and operational implementation of the purchasing strategy for sustainable, cost- and quality-optimized material and service supply as well as cost reduction and standardization - Selection of suppliers (national, international), their support & evaluation taking into account targets at the WITTUR Group location - Preparing, agreeing and conducting price and contact negotiations under “Total Cost of Ownership” aspects - Monitoring compliance with contracts & measuring the success of bundling & cost reduction initiatives - Timely identification of purchasing risks & derivation of appropriate measures - Supporting scheduling problems in the purchasing process as well as enforcing claims and initiating compensation measures - Maintaining inventory of goods at optional levels - Recording orders & framework contracts, master data maintenance, appointment tracking, price & invoice verification