Worked on the SegmentLinking/cmssw repository to deliver a targeted compatibility fix for Geant4 version 11.3, focusing on improving build stability within the simulation pipeline. Addressed a compilation warning by updating the GetElementTable and GetMaterialTable methods to return const pointers, ensuring const-correctness and smoother integration with evolving Geant4 APIs. This C++ change reduced maintenance risk for downstream users and enabled more reliable continuous integration outcomes. The work demonstrated careful attention to API maintenance and dependency management, leveraging expertise in C++ and Geant4 to support stable simulation results and lower upgrade blockers for the broader development and user community.