James Willis developed a new build configuration for Siesta 4.1.5 within the ComputeCanada/easybuild-easyconfigs repository, targeting streamlined deployment of electronic structure and molecular dynamics simulations on HPC systems. He used Python and EasyBuild to automate packaging and ensure reproducibility across scientific computing environments. By integrating Siesta as a foss build configuration, James enabled faster, more consistent workflows for researchers relying on high-performance computing. His work focused on repository consistency and traceability, with thorough documentation and clean integration practices. Over the course of the month, James demonstrated depth in build configuration and scientific software deployment, addressing reproducibility and workflow efficiency.