He is known for playing Sean Spencer in the soap opera Emmerdale (2011–2014), and for his role as Pepper Sharrow in the 2017 historical drama Jamestown.

Roskell had his first acting role in the ITV miniseries Mobile in 2007; the following year, he was part of the main cast of TV series The Revenge Files of Alistair Fury, broadcast by BBC One and the CBBC Channel; he played the role of Aaron Pryce, a friend of main character Alistair Fury (played by Jonathan Mason).

In 2010, Roskell branched out into theatre following a successful audition for the musical Her Benny, adapted from the eponymous Victorian novel (1879) about Liverpool street children by Silas Hocking.

[citation needed] From 2011 to 2014, Roskell portrayed Sean Spencer in the long-running soap opera Emmerdale, appearing in a total of 264 episodes.

After leaving the show, he returned to the stage in 2015 to take on the role of Carl Jackson, the lead in Gareth Farr's play Britannia Waves The Rules, touring with the Royal Exchange Theatre through several locations in North West England.