Martin Breheny has worked in sports journalism for 50 years and was the Irish Independent GAA Editor for 20 years before retiring from the full-time role in 2019. His weekly GAA column currently appears in the Irish Independent.

He co-wrote The Ultimate Encyclopedia of Gaelic Football and Hurling (2001) with Donal Keenan and collaborated in the autobiographies of several of the biggest names in GAA, including DJ - A Sporting Legend by DJ Carey (2013), Without a Shadow of a Doubt by Joe Kernan (2012), Cody by Brian Cody (2009), Blessed and Obsessed by Mick O'Dwyer (2007), Back to the Hill by John O'Leary (1997) and The Right to Win by Cyril Farrell (1994).

He has won many awards for his writing, including Sports Journalist of the Year in 2001, Sports Story of the Year in 2016 and the GAA McNamee Award in 1998. He was honoured with a GAA McNamee Hall of Fame Award in 2022.