[3] Robertson was selected for the Scotland national under-21 football team in April 2012, but was forced to withdraw due to a knee injury.

[11] On 21 June 2024, Robertson returned to Scotland and joined Scottish Premiership club Dundee on a two-year deal.

[12] In his first game with the Dark Blues, a friendly against Arbroath, Robertson suffered a hamstring injury which would keep him out for the first part of the season.

[13] Robertson made his return to the first team on 28 September, making his first appearance and start for Dundee in a league game at home to his old club, Aberdeen.

[15] In October 2024, Robertson reportedly began dating radio personality and former Love Island contestant Laura Anderson.