Complex sentence: He became manager at Queen's Park after taking over from Billy Stark in 2008, and extended his contract at the end of the 2009--10 season for a further two years, subsequently signing another extension on 27 January 2012 through until 2014.
Split into simpler sentences: He became manager at Queen's Park after taking over from Billy Stark in 2008. Spiers extended his contract at the end of the 2009--10 season for a further two years, subsequently signing another extension on 27 January 2012 through until 2014.