At the start of the 2005–06 season he made a number of appearances in first team friendlies for Manchester City but did not play any competitive matches.

He had an unsuccessful trial with Dunfermline Athletic in July 2006 before signing with Newry City in October, scoring on his debut against Coleraine.

[citation needed] In early 2007, he was invited to join Derry City on trial prior to the impending kick-off of the 2007 League of Ireland season.

He also made an appearance for Shelbourne as a substitute during their 2011 FAI Cup final defeat to Sligo Rovers.

Bermingham departed Shelbourne at end of 2011 and signed for Longford Town ahead of their First Division campaign in 2012.