Arush Srivastava enhanced the security of the YaleComputerSociety/ymeets calendar feature by implementing role-based access control for the 'Export to GCal' functionality. Using React with JavaScript and TypeScript, Arush modified the front end to ensure only administrators could view and use the export option, addressing a vulnerability where regular participants previously had access. This targeted code change improved data governance and auditability by aligning the feature with RBAC best practices. The work focused on a single, well-defined bug fix rather than new features, demonstrating careful attention to security and access control within a collaborative calendar application environment.