Paul Ritchie has joined Dundee as a player/coach.
Paul Ritchie has joined United's Tayside rivals Dundee
The former Hearts, Rangers, Dundee United and Manchester City defender is also hoping to resume his playing career after an injury-plagued spell.
Ritchie, 32, who earned nine caps for Scotland, hopes to feature for Dundee next year as he battles to overcome a knee injury.
Meanwhile, Dundee manager Alex Rae and his assistant David Farrell have signed 12-month rolling contracts.
Dundee chairman Bob Brannan told the club's website he was delighted with the manager's performance since taking over at Dens Park.
"We're delighted, as we've never had as much stability in recent years as we do now," said Brannan.
"The board is represented to the management through Dave MacKinnon and he's got great relationships with Alex and Dave and indeed we all get on pretty well together.
"I've got a great respect for what Alex has done here in the last 18 months, he's brought in some good players and more than that he's brought on our young players who were maybe lacking a little bit in direction."
Ritchie also spent loan spells with Bolton Wanderers, Portsmouth and Derby County.
The defender left Tannadice by mutual consent in August, 2006.
Dundee are currently second in the First Division, six points behind Hamilton, with 25 points from 13 games.