Born to a working-class family in east Belfast, Walker began his career with Torrin Boys youth club, before moving to Luton Town in England.
Walker brought huge success to the North Belfast club by winning the Irish League in 1995 and 1997, also winning the Gold Cup in 1996, the Ulster Cup in 1994, the County Antrim Shield in 1992, and the Stena Line Trophy in 1997, the same year he won the league.
[5] Roy Walker was not fired as Glentoran manager, and the resulting days became a media circus at the club, with some directors resigning.
Roy Walker then issued a statement in the Belfast Telegraph, informing the fans of the entire situation, and revealing that he believed he was still Glentoran manager.
He also revealed that he had been offered a place on the Glentoran board,[6] but McDonald refused to be part of the club if Walker assumed that position.
No board member issued a statement at that time, leaving many Glentoran fans unsure of the situation.
[7] After failing for the Uefa badges as Glentoran, Walker was appointed new manager of Ballymena United.
In the 2011/12 season, Walker resigned as manager after the Sky Blues lost to his former club Crusaders in the Irish League Cup semi-final on 13 December 2011.