New Zealand eScience Infrastructure (NeSI) enables researchers across a wide range of communities and disciplines to tackle large or highly complicated problems and to investigate scientific challenges that were previously impossible. NeSI makes approaching these problems easier for researchers through offering a specialised platform of computational and analytics software and services powered by supercomputers, and placing strong emphasis on support and training alongside the raw power of its technology platform. NeSI is a collaboration of the University of Auckland, the University of Otago, Manaaki Whenua - Landcare Research, NIWA, and MBIE.