Today, Lonza is one of the world's largest healthcare manufacturing organizations operating across five continents. While we work in science, there's no magic formula to how we do it. Our greatest scientific solution is dedicated people working together, devising ideas that help businesses to help people. In exchange, we let our people own their careers. Their ideas, big and small, genuinely improve the world. And that's the kind of work we want to be part of! The Buyer/ Planner will be responsible for performing all duties to ensure that the material requirements plans are completed and ensure the timely availability of materials to support the product supply plan. This person is also responsible to partner with all key functions to ensure timely updates to material plans considering changes to plans or material availability issues, and the execution of key tasks to support inventory plans and optimization initiatives. The Buyer/Planner will be responsible for proactively leading the performance of raw material suppliers, ensuring that the Material Requirement Plan can be realized, and ensuring relevant procurement master data is available and maintained in SAP so the material requirements plan (MRP) can be calculated reliably, and the PO creation process can be as effective as possible. Support the category manager and strategic buyers to implement their supply strategies and collaborate closely with accounts payable to resolve invoice queries.