Makarini is a mahinga kai practitioner, who lives and breathes Kai Tahu customary knowledge and practices. Kai Tahu are the indigenous people of the South Island of New Zealand (Te Waipounamu). For generations his whanau have observed seasonal harvesting practices. Through these intergenerational customs Makarini has been imparted with the matauraka (knowledge) of native flora and fauna species, environmental protection, and kaitiakitanga.

He is the Chair of the Tangatiaki Kaitiaki forum of Kai Tuahuriri (ki North Canterbury) and a practicing Tangatiaki Kaitiaki for Kati Huikai (ki Banks Peninsula). He sits on multiple boards as Mana Whenua representative and upholds the protection and revitalisation of our natural environment in these places. Makarini is also a Poū Matai Kō (Cultural Land Management Advisor), for the Canterbury Regional Council.

He has led multiple monitoring and restoration projects throughout the Waitaha region including the restoration of inaka (whitebait), other native fish habitats, the restoration of watercress beds, and reforestation.

Makarini holds a Masters in Māori and Indigenous Leadership specialising in customary knowledge, fisheries and customary rights. He has also worked with indigenous communities in the USA and Canada supporting and advocating for environmental protection and kaitiakitanga.