Particle energization in the Earth's magnetosphere and in the vicinity of the Earth's bow shock reflects multiple processes over various spatial and temporal scales. These processes are key to understand in order to predict the dynamical behaviour of the Earth's ring current and radiation belt energetic electron and ion populations, both local and global, and their space environmental effects. This session welcomes papers related to particle energization and its technological impacts. It is especially timely with the unprecedented opportunity of in-situ magnetospheric observations from the Van Allen Probes, GOES, Cluster, Themis, MMS, ePoP missions, the large ground based arrays of instrumentation (e.g. CARISMA, SuperMAG), the balloon-based observatories and CubeSat measurements.  We also invite simulations and theoretical studies to advance our understanding of particle energization and space environmental effects.