During February 2025, Ben Rubenstein developed hierarchical role-based access control for the broadinstitute/sam repository, focusing on scalable access control enhancements to support enterprise governance and secure data sharing. He refactored role definitions using HOCON and configuration management techniques, establishing a hierarchy where steward roles inherit custodian permissions, and custodians inherit snapshot_creator capabilities. This approach enabled more granular and manageable access permissions, aligning with evolving product requirements and improving security and auditing. Ben collaborated with cross-repository teams to ensure the RBAC model met governance needs. The work demonstrated depth in configuration management and thoughtful integration of access control best practices.