In the rapidly evolving landscape of ESG data, financial institutions face the dual challenges of data fragmentation and security. This session will explore OS-Climate's innovative use of open source technologies, including Apache Iceberg, Apache Spark and the Unity Catalog, the industry's only universal catalog for data and AI, to enable secure and efficient ESG data sharing across financial institutions. Through this session, participants will gain insights into the strategic benefits of leveraging open source tools for ESG data management, including enhanced data security, governance, and interoperability. In particular we will demonstrate how Unity Catalog Unity's multimodal interface supporting various data formats and engines supports compatibility across diverse data ecosystems to facilitate seamless integration and governance of data assets, allowing financial institutions to not only meet regulatory compliance but also to harness ESG data for strategic advantage.