Телфорд Юнайтед
Sinton was appointed manager of Isthmian League Division One outfit Fleet Town in summer 2005, having spent the previous season as the club's Football Development Officer. On 26 May 2010 it was announced that, from a large field of applicants, Sinton had been appointed manager of A.F.C. Telford United in Conference North. In his first season in charge, he led them to a second-place finish in the league and clinched promotion to the Conference via the playoffs. In his second season at the club, he kept them out of the Conference National's relegation zone all season and secured safety with two games still remaining. On 31 January 2013, it was announced that Sinton had left A.F.C. Telford United by mutual consent after a 16-match winless run, the worst in the club's history.