Clemens contributed to the slcs-jsc/mptrac repository by delivering preliminary GPU acceleration for the particle simulation module. He integrated OpenACC directives into the C codebase, focusing on parallelizing particle sorting and domain decomposition to leverage GPU computing. Clemens refactored data handling and optimized CPU-GPU communication, enabling more efficient parallel execution and laying the groundwork for scalable performance improvements in high-performance computing workloads. His work established a foundation for future throughput gains, demonstrating a solid understanding of parallel computing concepts and practical application of MPI and OpenACC. The depth of the changes reflects careful engineering to support future optimization and scaling.