He made his senior debut playing for the Otago Razorbacks in the 2014 ITM Cup where he made 3 substitute appearances before becoming more of a regular the following year, featuring in 9 games, 7 of which were from the start and scoring 2 tries. 2016 was a prettygood year for the Razorbacks as they reached the Championship final before losing to and Dickson was a key player for them in the second row, making a career-high 10 appearances. Dickson made 50 games for Otago in 2019.