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Legend Biotech is a global biotechnology company dedicated to treating, and one day curing, life-threatening diseases. Headquartered in Somerset, New Jersey, we are developing advanced cell therapies across a diverse array of technology platforms, including autologous and allogenic chimeric antigen receptor T-cell, T-cell receptor (TCR-T), and natural killer (NK) cell-based immunotherapy. From our three R&D sites around the world, we apply these innovative technologies to pursue the discovery of safe, efficacious and cutting-edge therapeutics for patients worldwide.   Legend Biotech entered into a global collaboration agreement with Janssen, one of the pharmaceutical companies of Johnson & Johnson, to jointly develop and commercialize ciltacabtagene autolecuel (cilta-cel). Our strategic partnership is designed to combine the strengths and expertise of both companies to advance the promise of an immunotherapy in the treatment of multiple myeloma. Legend Biotech is seeking a Sr. Manager, Supply Chain Planning a s part of the Manufacturing & Supply team based in Raritan, NJ.    Role Overview The Senior Manager, Supply Chain Planning & MRP will lead the Raritan CAR-T site Materials Planning and MRP function in support of commercial CAR-T manufacturing. This position is accountable for the creation, execution, and continuous improvement of the site Supply Plan and Material Requirements Planning (MRP) processes to ensure uninterrupted manufacturing execution and patient supply. This role serves as the site leader for material planning and inventory management activities and is responsible for translating demand, production schedules, inventory strategies, and supplier commitments into executable material and inventory plans that support current manufacturing requirements and future site growth. The individual will partner closely with Capacity Planning, Production Scheduling, Manufacturing Operations, Warehouse & Logistics, Procurement, Quality, MS&T, Finance, and Enterprise Supply Chain teams to proactively identify and mitigate supply risks, maintain inventory health, and ensure material readiness across short-, medium-, and long-term planning horizons. The position will lead a team of MRP planners and inventory professionals while driving planning excellence through standardized processes, KPI management, SAP S/4HANA optimization, inventory governance, digital planning adoption, and continuous improvement initiatives. Success in this role requires strong technical supply chain expertise, advanced analytical capabilities, the ability to lead through influence, and the potential to develop into a strong people leader within a highly regulated cell and gene therapy manufacturing environment.   Key Responsibilities  Own the end-to-end Material Requirements Planning (MRP) process supporting CAR-T manufacturing operations at the Raritan site. Lead creation, execution, and governance of material supply plans ensuring alignment to manufacturing demand, inventory strategy, and capacity plans. Own inventory management strategy and execution for planning-controlled materials, including coverage analysis, safety stock, inventory targets, shelf-life risk, scrap/obsolescence risk, and inventory health governance. Establish and maintain planning master data including planning parameters, lead-times, lot sizing, safety stock strategies, reorder points, and inventory policies. Drive accurate material coverage analysis and proactively identify future supply constraints, shortages, inventory exposure, and material readiness risks. Serve as the site subject matter expert (SME) for SAP S/4HANA planning processes and associated planning systems. Lead the Site Critical Materials Review process including supply risk identification, escalation, mitigation planning, and executive communication. Establish proactive inve