Career
In his career he has also played for Arsenal, Queens Park Rangers, Bournemouth and Crawley Town. Shimmin mainly plays as a centre half. Shimmin started his career, spending six years at Highbury playing for the various youth teams at Arsenal under Arsène Wenger.
After leaving the Gunners, Shimmin made the move across the city to Queens Park Rangers, with whom he played from 2005 until January 2008.
The deal was for a small nominal fee at first, with up to £80,000 in add-ons, dependent on appearances. Shimmin made his début against Coventry City in a 3–0 defeat, however a serious knee injury prevented him from playing many games for QPR. During this time Shimmin had a loan spell at Bournemouth where he only managed 2 league games due to injury.
Prior to that he was a youth player with Arsenal until 2004. QPR announced that Shimmin"s contract had been cancelled by mutual consent on 28 January 2008.
On 8 February 2008, Shimmin joined Crawley Town on a short-term deal.
He was released in March, after failing to overcome a hamstring injury. He impressed whilst at Crawley and it was with a heavy heart that the Red Devils were forced to release him. In July 2008, Shimmin joined Street Mirren on trial, but signed for Greenock Morton soon afterwards.
He made his first league appearance for Morton in a 2–2 draw with Street Johnstone at Cappielow on 8 August 2008.
Shimmin was named Irn-Bru Phenomenal Young Player of the Month for October 2008, after helping Morton to rally after a poor start to the season. Shimmin spent 9 months out "injured", from March 2009, making a return on the bench for the Scottish Cup game at Dumbarton on 5 December.
He was released by Morton at the end of the 2009-2010 season. Shimmin, as of 27 May 2010 has signed a 2-year contract at Dundee.
He had his contract terminated by administrators on 15 October 2010.
After his release by Dundee, Shimmin signed for Dover Athletic. Individual
SFL Young Player of the Month – October 2008.