Jackson was deeply involved in the trade union movement in the 1980s, as a field officer and then as secretary of the Clerical Workers Union for 17 years.[6]
He was also the chairperson of Te Kupenga o Hoturoa – the first Māori sponsored primary healthcare organisation; a Director of Te Roopu Huihuinga Hauora, a Māori healthcare organisation, and built up Turuki Healthcare as its CEO.
Jackson was first married to the late Hana Te Hemara, and was survived by his second wife Deirdre Nehua and his eight children. He was the brother of Moana Jackson.