A leading Defence organisation are seeking an experienced Senior Buyer to take ownership of key commodities and drive supplier performance across major programmes.Duration: 12 Month ContractPay: 500- 600 p/day (Inside IR35)Location: Marlow (Hybrid - 2/3 days on-site)Clearance: SC EligibleAs a Senior Buyer based in Marlow, you''ll play a critical role in managing high-value and high-risk categories, ensuring the effective end-to-end supply of materials and services that keep complex defence projects moving.Key Responsibilities:Lead procurement activities for assigned commodities, ensuring best-in-class sourcing and supplier management.Deliver year-on-year cost savings and productivity improvements in line with business objectives.Negotiate and manage supplier contracts.Oversee supplier quality, delivery, and performance metrics, including SOTIF and SDPPM.Support bid and new product introduction (NPI) activities with strategic sourcing input.Work closely with engineering and operations teams to optimise design for manufacture and supplier involvement.Identify and implement continuous improvement and total cost reduction initiatives.Key Requirements:Extensive experience in procurement or purchasing within a defence or aerospace environment.Proven track record in supplier relationship management and cost reduction.Strong understanding of MRP systems and commodity management.Excellent negotiation, communication, and stakeholder management skills.A proactive self-starter with the a