He first forced his way into wider attention in the first-class game. Playing for Central Districts against Wellington in November 2017, during the 2017–18 Plunket Shield season, he claimed a hat-trick, a performance that caught the eye of the national selectors.
That same summer he was just as effective in the shortest format. Across the 2017/18 Super Smash, New Zealand's domestic T20 tournament, no bowler took more wickets than Tickner, who collected twenty-one of them in only eleven matches. Central Districts rewarded this reliability in June 2018 by giving him a contract for the 2018–19 season.
A place in the national squad followed in January 2019, when New Zealand picked him for their home T20I series against India. His international debut came in the third game of that series, staged in Hamilton, and during it he dismissed the Indian batter Rishabh Pant.