ATLAS Electron Identification for the HL-LHC

Over the next decade the LHC will receive substantial upgrades; increasing its luminosity by around a factor of 10, allowing it to collect 3000 $\mathrm{fb^{-1}}$ of data over its lifetime. This will increase the pileup from around 20 to 200, making particle identification (pID) much more challenging. In preparation, the ATLAS detector will also be upgraded. Electron pID has been optimised for this new environment, and tested for various pileup scenarios.