As a product of the Scots College, Eastern Suburbs Maddocks rose to promise with his stellar showings for the Junior Wallabies. His experience in the bright lights started in 2016, following an impressive showing with NSW U20s he got a call into the Australian U20s side. Maddocks received his first taste of the highest honour experiencing the Wallaby Spring Tour in 2017 as development player. In 2018 Maddocks earnt his debut cap for the Wallabies at Eden Park where he scored on debut. Finishing with seven caps for the season, Maddocks was a crucial member of the Rebels for his first two years. 2019 also saw Maddocks build upon his Olympic dream, earning his first cap with the Aussie 7s side during their Oceania Championships win.