Richardson has been the goalkeeping coach at
Doncaster Rovers,
Nottingham Forest,
Cheltenham Town,
Peterborough United,
Wycombe Wanderers and
Hull City. Richardson returned to
Doncaster Rovers as goalkeeping coach in the summer of 2005. On 11 January 2008 he departed Rovers to succeed
David Watson as the goalkeeping coach at
Nottingham Forest. Rejoining Forest, where he had coached the academy goalkeepers in the 2004–05 season, he was also registered as a player being allocated (in line with his age) the squad number 38. He would be an unused substitute goalkeeper on occasions for Forest, wearing the squad number 39 in the 2008–09 season, the last time being on 3 January 2009 when Forest beat
Manchester City 3–0 in the FA Cup 3rd Round. He departed the club following the appointment of
Billy Davies as manager, rejecting an alternative role with the club after Davies appointed Pete Williams as goalkeeping coach. He joined
Cheltenham Town as goalkeeping coach at the start of the 2009–10 season whilst also acting as back-up goalkeeper. He was sent off as an unused substitute in a match against
Lincoln City on 14 November 2009. He parted company with the club on 21 January 2010 following the new manager
Mark Yates deciding to operate without a goalkeeping coach for the remainder of the 2009–10 season. On 3 February 2010 he signed a two-and-a-half-year contract to become player-goalkeeping coach at
Peterborough United . He was given the number 37 shirt and appeared as an unused substitute for the game against Blackpool on 17 April 2010 due to the absence of number 1
Joe Lewis and the number 30 shirt for the match against Huddersfield in the play-off final, where again he was on the bench due to the absence of Lewis. Richardson left this role by mutual consent on 21 January 2013.{{cite web On 30 January 2014 it was reported that Richardson had signed as the goalkeeping coach for
Wycombe Wanderers; he also registered as a non-contract player with the squad number 44.{{cite web During the
2014–15 season, having changed his squad number to 13, he was named as a substitute on thirty-five occasions for Wycombe but did not make a first-team appearance. At the age of 46, he played a competitive game for the first time in over 8 years on 30 January 2016, after an injury to first-choice goalkeeper
Alex Lynch during a match against
Plymouth Argyle, and kept a clean sheet in a 1–0 victory – the first time Plymouth had failed to score at home that season.{{cite web ==Coaching career==