Barry Nicholson has joined Aberdeen on a three-year deal after completing his £250,000 move from Dunfermline.
Barry Nicholson was with Dunfermline for five years
"I'm really excited at the prospect of being reunited with Jimmy Calderwood and Jimmy Nicholl," said the 26-year-old midfielder.
"The fact things took a wee while to get sorted out was absolutely nothing to do with Aberdeen.
"My recent operation was a complete success and I should be fit and ready for the start of pre-season."
Nicholson, capped three times for Scotland, is recovering from the double hernia operation that ruled him out of the last few games of the season.
And he will take the number eight jersey worn by Markus Heikkinen, who left the Dons under freedom of contract at the end of the season.
"Football is all about timing and I think I am coming to Pittodrie at the right time," added Nicholson.
"After the season the boys have just had, they will be pushing for Europe again next season and, having had a brief taste of it with Dunfermline last season, I want to get back there.
"I also still have international ambitions and I think I can realise them by doing well at Aberdeen."
Meanwhile, Aberdeen director of football Willie Miller is also still hoping to sign former Celtic midfielder Jamie Smith from Dutch club Den Haag.
He told the Aberdeen Press & Journal: "Talks are going well and Jamie is very positive about coming to Pittodrie.
"These things take a bit of time, especially when they are in the public domain, but talks are going well."