 Between 2003 and 2018, Theobald had a long career in non-league football, predominantly with Cambridge City, for whom he made 274 appearances and scored 39 goals across three spells.He also played for Canvey Island, Kettering Town, St Albans City, Royston Town, Soham Town Rangers and Bishop's Stortford.On 8 October 2015, Theobald and fellow senior player Robbie Nightingale took over as joint-managers of Isthmian League First Division North club Soham Town Rangers.