The SRU CEO, Faleomavaega Vincent Fepulea'i has confirmed the appointment of the New Zealander via telephone.
Jackson is a former New Zealand Maori representative and played for Tasman, Auckland, North Harbour and Southland, where he was captain.
He was assistant coach at Tasman and Counties-Manukau before securing his first head coaching role at North Harbour, leading them to the Championship win which saw them promoted to the Premiership.
Jackoson said he was honoured and privileged to be chosen as the successful candidate.