Mahdi worked on standardizing the CI build environment for the eclipse-openj9/openj9 repository, focusing on improving reliability and consistency across Mac AArch64 and x86-64 builds. He addressed environmental drift by pinning the Xcode toolchain to version 15.2 using YAML-based configuration, replacing OS-version labels with a centralized tool-based approach. This change unified the Jenkins/Mac build process and reduced maintenance overhead by removing outdated macOS test labels. Leveraging his skills in build engineering and CI/CD, Mahdi delivered a targeted feature that streamlined the build matrix, resulting in a more predictable and maintainable continuous integration environment for the project.