Jean-Philippe Lenain has always dedicated a significant part of his time to maintain and develop general tools for HESS collaboration and, this way, provided excellent support to the collaboration. He had transferred the HESS simulation framework to the international EGI GRID computing facility, and supports the production of simulated data. In parallel, he created programs dedicated to the automated survey of Fermi-LAT data for triggering target-of-opportunity HESS observations. As a service task more closely related to the detector, Jean-Philippe always scrutinized the quality of the collected data and contributed deeply to their calibration. He has supervised the development of tools dedicated to the survey of the performance of the real time analysis pipeline. He made a significant contribution to the development of run wise simulations which boosted the reliability of our physics results. He was also actively involved at the startup of CT5 and pushed the analysis teams to obtain the first HESS publication with this new instrument with a minimal time delay from the start of CT5 operations. More recently, Jean-Philippe has adapted simulation tools to take into account the new setup of the HESS 1 telescopes, and he is preparing the simulations for the eventual installation of the FlashCam prototype in the CT5 focal plane. His very strong and continuous support to the HESS collaboration is a key ingredient of our ability to publish high impact papers.