Mitch played for Nelson College then played for NZ Under 20's and Auckland in 2015. He moved home to represent the Mako from 2016, and has made the first-five position his own and is the team's main goal kicker. Mitch ran the cutter in the 2019 Mitre 10 Cup Premiership victory. A Crusaders from 2016, he played for the Highlanders in the 2020 Super Rugby Aotearoa campaign.