He has joined the Premier League outfit with responsibility for the development of young professionals.
O’Leary spent nearly two decades at the Swans as a player before leaving two years ago and working with Neath AFC.
He said: “Everyone knows the feelings I have for this club; I’ll give everything to my new role.’
“My role is to provide a link between the youth team and the first team, so I’ll be working with head of youth Tony Pennock and manager Michael Laudrup.
“If the first-team needs a player, then it’s up to us to produce one that’s ready to step up.”
O’Leary has made good progress with coaching qualifications and enrolled on a University of Glamorgan degree course in coaching and performance.
Having joined the Swans as a 14-year-old in 1992, O’Leary left nearly 15 years after making his senior debut.
He made more than 300 appearances for the club under 16 managers.
Photo Kris O’Leary Pic: Swansea City