Gordon Greer has completed his move from Doncaster to Swindon on a two-year deal.
The defender enjoyed a successful loan spell at the County Ground, where he played 19 times since arriving in January and even captained the side towards the end of his stay.
The 28-year-old had been told that his future lay away from the Keepmoat Stadium after the club revealed that he would be released in the summer.
The Robins have moved swiftly to get their man and manager Danny Wilson, whose priority over the summer was to strengthen his defence, will be delighted with the capture.
Wilson signalled that the arrival of Greer was the start of new era at the club - one that could involve the club bringing more youth players through.
"We are building for the future of this football club now and although we've found ourselves in a strange situation, we undoubtedly have some good youth players coming through the system, who we expect to be ready for first-team football by 2010," he said.
"That's the target. I would love them to prove me wrong by forcing their way in earlier of course."
Wilson has released 13 players since the last game of the season as he looks to rebuild a squad that just managed to survive relegation into League Two.
But one player who seems certain to leave the Robins against the manager's will is 22-year-old top scorer Simon Cox.
Swindon decided to take a punt on the frontman at the beginning of the season after he failed to make the grade at Reading, and 29 league goals later the youngster is now a sought-after prospect who Wilson knows will be hard to replace.
"We are hoping that Simon stays at the club as we know what a difficult job we would face if he were to depart," he said.
"It is unrealistic to think we could sign a player who is going to get 32 goals for us - more likely we would have to sign two players who could get that figure between them."