Walker Cole International is searching for a Senior R&D Scientist - E&L and Nitrosamine Method Development - to join a global pharmaceutical company at their R&D and GMP-regulated site in the UK. As the Senior Scientist, you will play a key role in developing and validating analytical methods to support Extractables, Leachables, and Nitrosamine testing across pharmaceutical products and materials. Your responsibilities will include: * Leading and supporting risk assessments and analytical method development for E&L and Nitrosamines. * Developing, validating, and transferring LC-MS and GC-MS methods in compliance with GMP and regulatory guidelines. * Performing data interpretation, troubleshooting, and technical investigations to resolve analytical issues. * Preparing technical reports and regulatory documentation to support product filings and submissions. * Collaborating with QC, QA, and Regulatory Affairs teams to ensure analytical compliance and product quality. * Contributing to continuous improvement within analytical R&D and supporting method optimisation projects. To be successful, you will have: * Proven experience in Extractables & Leachables and/or Nitrosamine analysis within a GMP-regulated laboratory. * Hands-on experience with LC-MS or GC-MS and method validation techniques. * Strong problem-solving, communication, and documentation skills. Analytical C...