St Mirren are looking for a new manager after parting company with Danny Lennon.
The former Cowdenbeath boss took charge in the summer of 2010 and led the Paisley side to League Cup glory in 2013.
Saints were one of a number of clubs battling to avoid the relegation play-off place this season but eventually finished in eighth place.
A club statement read: "The Board of Directors have today decided not to offer Danny Lennon an extension to his contract that expires in June 2014.
"Danny and his players gave our club one of its finest days on 17th March 2013 and they will always be remembered by the club for that wonderful day.
"Decisions like this are never easy, however we would in particular, commend Danny for his professionalism and the dignified way he has carried out his duties during a very challenging season.
"The Board would like to thank Danny for his service to the club over the last four years and wish him every success in the future."