During January 2025, Ufuk Oezkan enhanced build and environment reliability across the FESOM/fesom2 and esm-tools/esm_tools repositories. He introduced IntelLLVM icx compiler support to the FESOM2 build system by updating CMake configurations with icx-compatible flags and initialization settings, improving compiler portability and cluster readiness. In esm_tools, he resolved a Perl environment path issue on the JUWELS cluster by correcting the PERL5LIB variable in YAML configuration, ensuring consistent module discovery. His work focused on build system configuration, compiler flag management, and configuration management, addressing both feature development and bug resolution with targeted, cross-repository improvements in CMake and YAML.