The 19-year-old edge forward has swapped clubs with former Tigers wing Kane Bradley.
Simpkins, a former Rotorua Boy's High School first XV forward, had one game for the Townsville Blackhawks – a Cowboys feeder club – in the under-20s grade last year before the season was aborted due to the Covid-19 pandemic.
He was highly regarded in North Queensland, but Cowboys head of football Micheal Luck said “Tuki had an opportunity to take up a long-term deal with another club, and we wish him all the best’’.
