Dr. Patrice Calegari has more than 25 years of experience in HPC. He is the Technical Domain Leader of GUIs for the "HPC & AI software R&D" at Atos, and he recently wrote a survey about HPC portals (published by ACM). He is also the Product Manager of the Atos’ HPC web portal: eXtreme factory Computing Studio (XCS). He joined Bull, now an Atos company, in 2005 as an HPC Application Expert to help start the HPC business at Bull. He was a key contributor to the development of Bull’s HPC-as-a-Service Cloud offer. Before joining Bull, he held various positions as HPC System software engineer and developer at CERN, Compaq and Hewlett-Packard. Patrice holds a Magistère in Computer Science from ENS Lyon in France and obtained a PhD from the Swiss Federal Institute of Technology (EPFL) on the parallelization of population-based evolutionary algorithms for combinatorial optimization problems.