Over a two-month period, this developer centralized and standardized mutation testing configuration across multiple HMCTS repositories, including rd-location-ref-api and rd-caseworker-ref-api, by introducing shared pitestVersion variables and consolidating dependency management in Gradle build files. They improved maintainability and reduced version drift by establishing a single source of truth for PITest and JUnit Pitest plugin versions, simplifying updates and CI pipeline management. In rd-location-ref-data-load, they enhanced mutation testing reliability in CI by upgrading plugins and addressing configuration errors, while also mitigating a known security vulnerability through targeted configuration changes. Their work focused on build automation, configuration management, and security patching.