During May 2025, Mateusz Bach implemented a hierarchical threading option for the antmicro/verilator repository, enabling independent control over the number of threads used for scheduling hierarchical blocks. He designed and integrated a new command-line interface option, --hierarchical-threads, making core changes in C++ to decouple hierarchical and main thread counts within the simulation engine. This work leveraged his expertise in compiler development and multithreading, with attention to SystemVerilog simulation performance. Mateusz also updated both user and developer documentation to support adoption of the feature. The solution addressed scalability and resource utilization challenges in large, complex hardware designs, demonstrating technical depth.