He grew up as a West Ham United supporter, and aged six, was a mascot at a match against Preston North End, walking alongside Trevor Brooking.

In late 1993, Robertson began his first tour of duty to Northern Ireland for six months, settling in West Belfast.

He then worked in the United States for a year, before moving back to England to a job at Crystal Palace.

Robertson remained as the Academy Manager of Peterborough United where he stayed until the sacking of Darren Ferguson on 21 February 2015.

[10] On 19 November 2015 he was announced as the new manager of League of Ireland Premier Division side Sligo Rovers beginning in January 2016.