The Opportunity We’re looking for an experienced Manufacturing Planning Manager to play a key role in a major SAP S/4HANA transformation programme within the Defence sector. This is a high-impact position where you will act as the UK Subject Matter Expert for Planning & Control within Manufacturing. You will help define, validate, and implement future-state SAP S/4HANA processes while ensuring business continuity throughout the transformation. This role sits at the heart of manufacturing operations and digital transformation — offering real influence over how planning and execution processes operate long-term. What You’ll Be Doing * Leading the definition and validation of future-state SAP S/4HANA Planning & Control processes * Reviewing and signing off detailed process design documentation * Driving harmonisation of manufacturing planning processes across international teams * Leading system testing activities within your functional area * Supporting data migration and data cleansing activities * Working closely with change and training leads to support adoption * Engaging senior stakeholders across UK and European sites * Ensuring continuity of manufacturing planning operations during system transition What We’re Looking For * Strong experience using SAP ERP in a manufacturing environment (Planning & Control focus) * Deep understanding of manufacturing planning processes (MRP, production planning, execution control) * Experience in SAP S/4HANA programmes or ERP transformations * Confident stakeholder manager, comfortable in multinational environments * Strong analytical and problem-solving skills * British Citizenship required * Must be ok with monthly international travel What’s On Offer * Competitive salary * Performance bonus (up to 20%) * Strong pension contribution * Hybrid working model * Long-term involvement in a major digital transformation programme This is an excellent opportunity for a Manufacturing Planning professional with strong SAP expertise who wants to shape the future of manufacturing systems within a complex, engineering-led defence organisation. Please reach out for an exploratory conversation to find out more details about the opportunity