Since 2013, Roche was chairman of the Hurricanes rugby union franchise.[5] He led the team that gained the 2011 Rugby World Cup hosting rights for New Zealand and later chaired group that organised the championship, taking over from Jock Hobbs.[2] He has been chairman of Antarctica New Zealand, Tait Communications, and the Wellington Gateway Project.[5] On 11 June 2019, Roche commenced his second term as chairman of the NZ Transport Agency.[6] A condition of the appointment was Roche's resignation from the Wellington Gateway Project to avoid a conflict of interest.[7]