HPC-DAT trains NES researchers to make effective and easier use of high performance computing systems necessary to address fundamental research questions. We will organize multi-day hackathons, dedicated training events and build upon the established Python-PyData-Jupyter-Dask ecosystem. Close collaboration with researchers is achieved through selected use cases, a broad user’s committee and an open user forum. The hackathon approach will furthermore enable the project to directly engage with existing and future users from a broad set of disciplines and their evolving needs for large-scale computing.