Defender Ben Tilney has joined Brackley Town on a season-long loan deal.
The move will see the 20-year-old spend a second temporary spell with the National League North side after a stint at St James Park during the 2015/16 season.
Robbie Neilson told mkdons.com: “Ben and I had an honest discussion about where he sees his professional future and we agreed that this was the right move for both parties at this time.
“Ben wants a comfortable environment so he can enjoy his football - we wish him all the best. We will monitor him throughout his loan spell and re-assess the situation as a whole towards the end of the season.”
Tilney has made 11 first-team appearances for the Dons and scored in the win over Newport County almost a year ago.