Dr Dan Hikuroa (Ngāti Maniapoto, Tainui, Te Arawa) is an earth system scientist and senior lecturer in Māori Studies at the University of Auckland, and former Research Director at Ngā Pae o te Māramatanga. Drawing from both mātauranga Māori and science, he promotes new ways of assessing sustainability. Well-known for his work on water — the Hauraki Gulf, geothermal developments, river and catchment restorations – he is involved in Te Awaroa, a team building collective action to care for waterways.