Biley was appointed manager of
Eastern Counties League club
Ely City in 1998 after the club had finished as runners-up in the league the previous season. However, the club were relegated at the end of the 1998–99 season, after which Biley resigned. He later managed
Potton United and
Barton Rovers before resigning after four months to take over at
Diss Town. After leaving Diss, he managed
Spalding United, from October to December 2002, later joining
Wootton Blue Cross as assistant manager in June 2003. In February 2004, Biley joined
Kettering Town as assistant manager, working under his former Derby County colleague
Kevin Wilson. Biley had two spells as assistant manager of Kettering, separated by a short spell as caretaker manager of Spalding United in February 2006, before taking over as manager of
Rothwell Town in November 2006. He resigned from his post at Rothwell in May 2007. In 2007, Biley was once again re-united with Wilson as he became assistant manager of
Corby Town, however, following a bad run on the back end of the year. In 2008, he went back to Spalding for a fourth time as manager; Spalding were on the verge of relegation to the
United Counties League, but Biley kept them in the
Northern Premier League. On 3 January 2014 Biley became assistant manager at struggling
Southern League Premier Division club
Bedford Town. ==Career statistics==