Darleen Tana Hoff-Neilsen is a New Zealand environmental scientist, businessperson, and former politician. Of Ngāpuhi, Ngāti Porou, Ngā Rauru, Te Āti Awa, and Ngāti Kahungunu ki Wairarapa descent, she grew up in Northland with Māori language in a marae setting. She earned a Bachelor of Chemical Technology from Massey University and later, through a Rotary Foundation scholarship, an MBA from Solvay International Business School.