On 18 June 2024, the SPACE CoE will be hosting an event on the OpenGadget code for Cosmological Simulations. The training is aimed at HPC experts from all domains who are interested in adapting their codes for exascale computing. Participants will benefit from the training by learning how another community is tackling computational problems and implementing algorithms. In turn, speakers will benefit from audience observations, discussions, suggestions, and even error spotting.