Her appointment was jointly announced by Linda Te Aho, chair of Te Arataura, the executive committee of the iwi, and van der Heyden, who said as one of New Zealand's most experienced Māori governance professionals, Raumati-Tu'ua brought both continuity and change for TGH.
TGH manages around $950 million of assets, including shares.
Its major projects include current development of the first 92ha of the Ruakura Superhub at Hamilton, due to open mid-next year, construction of new regional headquarters in the city for ACC, and a joint venture with Kiwi Property to redevelop Centre Place North in the CBD.