Having made his professional debut on the stage in Stephen Daldry's production of An Inspector Calls, Jack followed up by touring with Mike Bartlett's Medea, the National Tour and West End run of The Full Monty, and with appearances on screen in Casualty and Matt Smith's final episode and Christmas Special of Dr. Who. The Go-Between adapted from the J.P. Harley novel by Adrian Hodges and directed by Pete Travis was Jack's first leading television role. Jack played the role of Young Beowulf in the ITV series Beowulf broadcast on the Esquire Channel in the US. He played the role of Lubko in the feature film Bitter Harvest filmed in and around Kiev, Ukraine and Pinewood Studios. Jack spent several weeks in Budapest shooting the Martin Koolhoven feature film Brimstone starring Dakota Fanning and Guy Pearce.