Cornelia Arcaro was awarded the HESS Prize in November 2020 for her tremendous work in recovering, maintaining and documenting the H.E.S.S. pointing models. The pointing models are used to calibrate the telescopes’ positioning systems, by comparing the locations of bright stars measured by external cameras on the telescopes to their expected positions. Cornelia’s work included smoothly and regularly producing pointing models by checking the data, processing the models, identifying and monitoring changes, as well as updating and maintaining the documentation. She engaged with many aspects connected to the generation of pointing models, including GPS timing, and CCD cameras. Moreover, Cornelia has been very active as member of the GRB team. She has served as a gamma ray burst expert on-call for many shifts. Her engagement in the GRB team came to fruition when being the resident observer and shift-GRB-expert in the night the very first GRB to be discovered in the VHE energy range was observed (GRB 180720B). Her on-site presence was an important asset in securing these transformative observations.