Doncaster Rovers last week announced that they would be releasing the 28-year old and Town have moved quickly to secure the services of the defender.

Greer made a big impact during a 19-game loan spell during the second half of the 2008/09 campaign.

His performances helped Swindon to secure League One safety and Greer's performances did not go unnoticed by Town supporters or management, with Greer Captaining the side during the latter stages of his term.

Greer was in Swindon on Tuesday to agree terms of a two-year deal and he will officially become a Town player on 1^st July.