Senior Materials Planner

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About the role

About IonQ: IonQ, Inc . [NYSE: IONQ] is the world’s leading quantum platform and merchant supplier - delivering integrated quantum solutions across computing, networking, sensing, and security. IonQ’s newest generation of quantum computers, the IonQ Tempo, is the latest in a line of cutting-edge systems that have been helping customers and partners including Amazon Web Services, and AstraZeneca achieve 20x performance results and accelerate innovation in drug discovery, materials science, financial modeling, logistics, cybersecurity, and defense. In 2025, the company achieved 99.99% two-qubit gate fidelity, setting a world record in quantum computing performance . Headquartered in College Park, Maryland, IonQ has operations in California, Colorado, Massachusetts, Tennessee, Washington, Italy, South Korea, Sweden, Switzerland, Canada, and the United Kingdom. Our quantum computing services are available through all major cloud providers, while we also meet the needs of networking and sensing customers across land, sea, air, and space. IonQ is making quantum platforms more accessible and impactful than ever before. Location: Oxford, England, United Kingdom Travel: Up to 10%, International Job ID: 1895 The Role: We are looking for a Senior Materials Planner to join our Supply Chain and Inventory team in Oxford. You would be working closely with engineering, manufacturing and procurement to make sure the right parts arrive when the build needs them. Our engineering builds and New Product Introduction programmes move at the pace of the parts that arrive. When a single long lead item slips, a build slot sits idle and the schedule behind it shifts. Today the picture of what is on order, what is late and what that does to the next build lives in several places at once, across MRP data, vendor conversations and spreadsheets. Nobody owns the whole picture, and that is the job. You will run system level materials planning from MRP data, turning forecast into a build schedule people can rely on. You will source and negotiate with vendors, raise purchase requisitions and chase deliveries that are drifting. A good deal of this role is telling people early that a date has moved. This is an in office role in Oxford, five days a week. Materials planning here depends on being close to the builds, the stores and the people running them. Responsibilities: In this position, you will have the opportunity to improve material availability, accelerate production timelines and strengthen supply chain reliability across engineering and NPI programmes. Your key responsibilities can be split into two categories: Planning and scheduling • Execute system level materials planning from MRP data to support engineering builds and NPI schedules • Publish and maintain daily and weekly build schedules from forecast analysis and material availability • Monitor, report and resolve material shortages, discrepancies and constraints before they stop a build • Manage production work orders and report on material readiness and build progress Vendor and supply • Source and negotiate with vendors, including obtaining quotes and agreeing lead times • Raise purchase requisitions and expedite deliveries that are slipping • Act as the point of contact between vendors and the internal teams waiting on parts • Work across engineering, manufacturing and procurement to clear blockers on critical builds Requirements: To be successful, you will need five or more years of materials planning in a manufacturing environment with multi level bills of materials, or an equivalent combination of education and experience. You will have a working command of MRP across planning, purchasing, inventory and manufacturing operations, hands on experience with ERP and PLM systems,

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