While there, in his first week, he made his professional debut, landing several jobs as a model and child actor in adverts, music videos, film and television.

[2] After graduating, Pinnock joined Lea Anderson's Contemporary Dance Company, the Featherstonehaughs, for several years before pursuing acting full time.

[4] He played guest roles in television programmes such as Grange Hill, EastEnders, The Bill, Dalziel and Pascoe, Footballers' Wives and Casualty.

That same year, he went on to play the role of Leon in a four-part drama Top Boy, which was broadcast on Channel 4 over four consecutive nights from 31 October 2011.

[12] Pinnock was cast as lead character Aaron Wallace in For Life, an American legal drama television series created by Hank Steinberg and executive producer Curtis "50 Cent" Jackson.

[17] Pinnock played John Ellis in Django, a 2023 television series for Sky and Canal+, alongside Noomi Rapace, Matthias Schoenaerts and Lisa Vicari.

[18] Pinnock was cast in This Town, alongside Michelle Dockery and Jordan Bolger, a 2024 six-part British television series for BBC One written and created by Steven Knight.

[20] In December 2022, Pinnock was announced as winner in the Best Actor category at the British Urban Film Festival awards in London.