Marc worked on PowerSystems.jl, where he extended the _make_per_unit! function to support per-unit conversion for zip load components, enabling more accurate data scaling and representation in power systems modeling. He approached this by enhancing the data parsing logic and updating the test suite to reflect new expectations for active and reactive power values in PSSE load components. Using Julia, Marc applied his skills in data parsing, power systems analysis, and testing to ensure robust and reliable code. His contributions addressed both feature development and bug fixes, demonstrating a thoughtful approach to maintaining code quality and aligning with evolving modeling requirements.