Former Derry City midfielder Ruaidhri Higgins joined Coleraine on Monday after his contract at Dundalk was cancelled by mutual consent.
Higgins, who has signed a two-and-a-half year deal with Coleraine, joined Dundalk 12 months ago after failing to secure a new contract at Derry.
"He will bring so much to the club," said Bannsiders boss Oran Kearney.
Meanwhile, striker Tiernan Mulvenna has left Cliftonville five months after his arrival from Glenavon.
Mulvenna has rarely featured for the Premiership champions since he was involved in a swap deal which saw midfielder Ciaran Caldwell go in the opposite direction.
Higgins made 40 appearances for a Lilywhites side managed by former Derry boss Stephen Kenny.
The 30-year-old, who helped Dundalk to the league title and EA Sports Cup success, signed a new deal at Oriel Park in November but has left the League of Ireland club just two months later.
"Obviously it's a tough decision and I leave with a heavy heart," Higgins told the Dundalk club website.
"I have known Stephen Kenny for the last 10-11 years and he has been such a great influence on my career.
"He has been great to me and took me here and had me at Derry City - we have spent the last few days talking about this and he was reluctant to let me go, but we agreed."