Alexander Wilkinson focused on stabilizing PFParticle classification within the DUNE/dunereco repository, addressing a bug that caused incorrect track and shower identification. He refactored the PFParticleUtils isTrack and isShower methods to leverage lar_pandora::LArPandoraHelper, integrating this tool to improve particle ID accuracy and reduce misclassifications. Working primarily in C++, he emphasized code quality and regression safety while enhancing maintainability in DUNEAnaPFParticleUtils.cxx. This targeted bug fix resulted in more reliable PFParticle classifications, directly benefiting downstream physics analyses. Alexander’s work demonstrated depth in C++ refactoring, data analysis, and software development, contributing to more robust scientific workflows in DUNE.