The announcement that A Clockwork Orange was to be staged in Singapore generated considerable media interest, as all theatre productions of Anthony Burgess' dystopian classic had been banned in the city-state for over 30 years.

Debbie Gilpin of Broadway World described his portrayal as "without doubt this is one of the standout lead performances of the year so far"[13] and Jane Kemp of WhatsOnStage.com commented "Alex is played with brutal splendour by Jonno Davies".

In addition to performing in A Clockwork Orange, Davies played the title role in Dracula[24] at the Edinburgh Festival Fringe in 2014 and was also a cast member of the Olivier Award-nominated production of Shakespeare in Love[25] at the Noël Coward Theatre in London's West End in 2015.

In June 2019, it was announced that Jonno Davies had been added to the cast of the then-forthcoming Amazon Prime series The Hunt[26] (subsequently renamed Hunters[27][28][29]), starring Al Pacino.

Davies has appeared in several TV series and films, including Kingsman: The Secret Service as Lee Unwin,[30] Casualty,[31][32] Spotless, Silent Witness,[33] Hollyoaks[34] and Doctors.