Barker features a professional football background, starting his career at Brighton and Hove Albion before having loan spells at Barnet and Newport County. Barker then joined Swindon Town for the 2014-15 campaign.

In the past few seasons he has featured for non-league teams on the south coast, with spells at Gosport, Havant & Waterlooville and a short spell at the start of this season at Salisbury FC.