Atlassian is rebuilding its central lakehouse from the ground up to deliver a more secure, flexible and scalable data environment. In this session, we’ll share how we leverage Unity Catalog for fine-grained governance and supplement it with Immuta for dynamic policy management, enabling row and column level security at scale. By shifting away from broad, monolithic access controls toward a modern, agile solution, we’re empowering teams to securely collaborate on sensitive data without sacrificing performance or usability. Join us for an inside look at our end-to-end policy architecture, from how data owners declare metadata and author policies to the seamless application of access rules across the platform. We’ll also discuss lessons learned on streamlining data governance, ensuring compliance, and improving user adoption. Whether you’re a data architect, engineer or leader, walk away with actionable strategies to simplify and strengthen your own governance and access practices.