He's been a Swindon for about 3 years now after joining from Watford, but first played for Swindon on loan over 4 years ago.
Sturrock said: " I felt it was important to get him tied up as soon as possible. I am very pleased and I think Jerel could be the cornerstone of our defence next season. He has committed himself to the football club and will be moving to the Swindon area."