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Join RSSB as Principal Data Scientist and lead the delivery of AI and machine learning solutions that make a real impact across the rail industry. In this senior role, you’ll identify high-value opportunities, engage stakeholders, and ensure our digital products solve real-world challenges. You’ll mentor and develop the team, champion best practices, and represent RSSB’s Data Science and AI capability across the sector. You’ll drive innovation by introducing new tools and frameworks, inspiring a culture of continuous improvement and experimentation. Success will be measured by the delivery of high-impact solutions, stakeholder satisfaction, and the growth of the team. This is a permanent role based at the RSSB office in Fenchurch Avenue with hybrid working. In-office days will be based in the City of London, supported by a commuting travel subsidy benefit. The close date for the role is 11th December 2025. Responsibilities What you’ll do: Promote RSSB’s Data Science and AI capabilities internally and externally, positioning the team as a trusted partner and thought leader. Identify and prioritise opportunities for AI enabled digital solutions by engaging with both external partners and internal subject matter experts. Lead the team in navigating complex, ambiguous, and novel challenges, making informed decisions in situations with incomplete information. Drive the development and delivery of Machine Learning (ML) and AI solutions, acting as technical lead and ensuring alignment with business objectives. Foster a culture of adaptability and resilience, ensuring the team thrives in a rapidly evolving environment. Contribute to team strategy, and the development and implementation of policy, processes, standards and guidelines. For full JD please visit the RSSB site. Why Join RSSB? We value our people and offer a competitive benefits package, including: 30 days annual leave (plus bank holidays) Private medical and dental cover Flexible and hybrid working options Season ticket loan and travel subsidy Cycle to work scheme Volunteer leave Performance-related bonus Pension scheme Learning and development opportunities Ready to Apply? Apply now and help us shape the future of railway standards. We value diversity and equal opportunities in employment and are committed to creating a workplace which is inclusive to everyone. As a member of the Disability Confident Scheme , we encourage candidates with disabilities who meet the minimum criteria, to apply for our jobs. If you have applied under the Disability Confident Scheme, please let us know in advance by emailing Find out more about Diversity and Inclusion at RSSB: If you require any reasonable adjustments with respect to our selection process including information in an alternative format, please contact us at We understand the importance of work-life balance, and we offer our staff the flexibility to work within our core hours and the option to vary their location between both the office and home. If you are looking for further flexibility, speak to us at interview stage so that we can consider your request.