The Spanish thematic network on Lattice QCD, LatticeNET, funded by the Ministry of Science and Innovation, announces the organization of the school: “Computing Challenges in HEP @Exascale” to take place at the Benasque Center for Sciences (Benasque, Spain), from 19th to 23rd of September 2022. The school aims to develop a broad interest program, oriented to generate synergies across the community. We welcome Master's, PhD´s. Students and Early Career Postdocs from the extended HEP community. Topics will cover aspects of general applicability in scientific computing for High Energy Physics using as guidelines the current status of Lattice QCD, LHC data analysis and Phenomenology codes requirements.