Michael Brown centralized and standardized PITest and JUnit Pitest plugin version management across multiple HMCTS repositories, including rd-location-ref-api and rd-caseworker-ref-api, by introducing shared configuration variables and dependency maps in Gradle build files. He improved maintainability and reduced version drift by consolidating mutation testing setup, enabling a single source of truth for plugin versions. In the rd-location-ref-data-load repository, Michael enhanced CI-driven mutation testing stability and addressed a known security vulnerability through targeted configuration changes. His work leveraged skills in build automation, dependency management, and CI/CD, resulting in more predictable pipelines and simplified future upgrades across Java-based projects.