After attending Newbridge College, Moore works as a bank employee and has a desire to express himself using traditional music. During a twelve-week bank strike in 1966, he goes to England, as do many striking officials, but he does not return when the strike is settled. Doing general labouring work, he frequents the folk clubs and the Irish music pubs where he meets Séamus Ennis, Margaret Barry, Luke Kelly, Martin Byrnes, and many other traditional musicians.
Moore’s first album, Paddy On The Road, a minor release of 500 copies, is recorded with Dominic Behan in 1969. In 1972, his first major release, Prosperous, brings him together with three musicians, Liam O’Flynn, Andy Irvine, and Dónal Lunny, who shortly thereafter form the Irish folk music band Planxty. For a short time they called themselves “CLAD,” an acronym of their names, but soon decide on Planxty.
After leaving Planxty in 1975, Moore continues his solo career, reforming his old band on occasion. He also forms the band Moving Hearts with Lunny and five other musicians in 1980. In 1987, he appears on Gay Byrne‘s The Late Late Show performing with The Dubliners for their 25th anniversary. In 2000, he publishes his autobiography, One Voice.
Moore’s earlier years of heavy drinking, sleeping dysfunctional hours, continual traveling, and often eating takeout foods results in a decline in health and several operations. Moore’s battle with alcohol and subsequent heart operations take their toll. At the end of the 1990s, Moore reduces his workload for medical reasons.
Moore releases his first new studio album in four years on April 17, 2009, entitled Listen, and promotes it through a series of live gigs. In December 2011, he releases the album Folk Tale. His most recent album, Where I Come From, is released in November 2013 and features a new protest song called Arthur’s Day. The album peaks at No. 3 on the Irish album charts.
Moore is best known for his political and social commentary which reflects a left-wing, Irish republican perspective, despite the fact that his mother was a Fine Gael county councillor and parliamentary candidate in Kildare. He supports the republican H-Block protestors with the albums H-Block in 1978, the launch of which is raided by the police, and The Spirit of Freedom. He also records songs by hunger striker Bobby Sands, including Back Home in Derry. Moore ceases support of the military activities of the Irish Republican Army (IRA) in 1987 as a result of the Enniskillen bombing.
Political songs Moore has performed throughout his career include Mick Hanly’s On the Blanket about the protests of republican prisoners, Viva la Quinta Brigada about Irish volunteers who fought against the Fascists in the Spanish Civil War, and Minds Locked Shut about Bloody Sunday in Derry.