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The union held a farewell for him last week.
North Harbour, coached by Liam Barry, endured a wretched year in the ITM Championship, recording one win in 10 matches and finishing seven points behind second-last placegetter Manawatu.
The union's administration is coming under increasing fire from union diehards who believe not enough has been done to equip the team with the resources needed to compete at ITM Cup level.
Wilson, who represented his country at the highest level at rugby and cricket, will instead focus on his family and media commitments.
The 39-year-old is married to former Silver Ferns netball captain Adine Wilson.