Defender Sean O'Hanlon has joined Hibernian on a two-year contract.
The 28-year-old centre-half came through the ranks at Everton before going on to captain Swindon and MK Dons, whom he joined in 2006.
O'Hanlon told the Hibernian website: "I'm really pleased to be joining Hibernian and I'm looking forward to trying to win some silverware.
"Basically, I want to help Hibernian challenge for cups, get into Europe and to compete well in the league."
O'Hanlon, who represented England at Under-20 level, made 32 starts for MK Dons last season, after knee surgery had severely limited his participation in the previous campaign.
"Colin Calderwood says he has been chasing me for a few years, so it is great to be able to sign for a manager that has shown such a lot of interest in me," he added.
"I'm very fortunate this opportunity came about. Hibernian are one of the biggest clubs in Scotland and it is a fantastic set-up.
"The training ground is better than the one Everton had when I was there - it is the best training facility I've experienced as a professional.
"As an experienced player, anything I can give to the younger lads I'm going to do and I still want to improve - I want to lead from the front on match days."
The 6ft 1in defender should offer Calderwood an attacking threat at set-pieces.
"I like to get my head on corners or free-kicks," he said.
"But first and foremost I'm here to get clean sheets and if we get clean sheets then hopefully our strikers will do their job at the other end."
Former Scotland defender Calderwood said: "Sean is an experienced player and a great professional with leadership qualities - I'm really pleased to have him on board for next season.
"He is another experienced voice in the dressing room and a good organiser on the pitch.
"He certainly complements what we already have in the squad and is an important addition."