Migrating petabyte-scale data lakes from on-premises infrastructure to the cloud is one of the most challenging undertakings for enterprise data teams. Traditional migration approaches force organizations to choose between risky "big bang" cutovers or maintaining complex dual systems indefinitely. Apache Iceberg offers a third path: a seamless bridge that enables zero-downtime migration while maintaining data consistency across both environments.This session presents a battle-tested approach for using Iceberg as the foundation for hybrid on-premises-to-cloud migrations. We'll walk through a real-world migration journey, demonstrating how Iceberg's vendor-neutral table format and ACID guarantees enable organizations to operate simultaneously across both environments during the transition period.