Lieutenant-Colonel Sir Harawira "Wira" Tiri Gardiner, KNZM (born 1945) is a former professional soldier, senior public servant and writer. He is of Maori descent, his tribal affiliations are Ngati Awa, Ngati Pikiao, Whakatohea and Te Whanau-a-Apanui.
Gardiner's public service career spanned 12 years from 1983-1995. During that time he was founding director of the Waitangi Tribunal, the founding (and only) General Manager of the Iwi Transition Agency and the founding chief executive of the Ministry of Maori Development (Te Puni Kokiri). He has also been National Director of Civil Defence, Chair of Te Mangai Paho, and deputy chairman of Te Ohu Kaimoana, the trust responsible for advancing the interests of iwi in the development of fisheries. He is the fourth ministerial appointee to the Council of Te Wananga o Aotearoa, and is deputy chair of council at Te Whare Wananga o Awanuiarangi.
He was made a Knight of the New Zealand Order of Merit in 2008 for his services to Maori.