Over a two-month period, github-admin@google.com modernized CI/CD infrastructure across multiple repositories, including GoogleChromeLabs/ps-analysis-tool, google/filament, dart-lang/sdk, googleapis/google-api-java-client-services, and opensrp/android-fhir. They upgraded GitHub Actions runners from deprecated Ubuntu 20.04 to 24.04, addressing deprecation risks and improving build reliability. Using YAML for workflow configuration and leveraging DevOps practices, they ensured traceable, per-repository upgrades that standardized environments and reduced the risk of environment-induced failures. Their work focused on workflow optimization, cross-repo consistency, and security alignment, resulting in faster feedback loops and more stable releases. No bugs were reported, reflecting careful planning and execution.