Moore plays with a number of bands before securing his big break with the Capitol Showband in 1958. Its lineup includes band leader, Des Kelly, and Paddy Cole, who is still involved in the entertainment business, and an early songwriter for the band is Phil Coulter. The Capitol achieves a considerable degree of success in the early 1960s attracting huge crowds in the State’s many ballrooms. It tours the United States in 1961, and two years later becomes the first showband to appear on the new RTÉ Television service. The Capitol plays in the London Palladium in 1964 on a night when the lineup includes Roy Orbison.
Moore marries Norah Sheridan in 1962. They have three children – Karen, Grainne and Gary.
Moore achieves celebrity status as Ireland’s first contestant in the Eurovision Song Contest in 1965. At the height of his success, he wins the National Song Contest to represent Ireland in the Eurovision Song Contest 1965, in Naples, singing Walking the Streets in the Rain. The song reaches number one on the Irish Singles Chart, but fails to chart in the United Kingdom.
As the lead singer with the Capitol Showband, he rivals the Royal Showband’s Brendan Bowyer as Ireland’s most popular showband vocalist. His marriage to Norah breaks down in 1969 and his career begins to decline. He emigrates to the United States in 1970, where he spends the last 31 years of his life.
Moore marries Irish ballad singer Maeve Mulvany in 1972 in the United States. They form a very successful group known as “Butch N Maeve” with a mixture of ballads and pop. They also own a pub in Massachusetts named after one of their songs, The Parting Glass. They have three children, Rory, Tara and Thomas.
Although suffering from cancer of the esophagus, Butch Moore dies of a heart attack on April 3, 2001. His body is returned to Dublin and a funeral Mass is celebrated at St. Canice’s Church in Finglas. After his death, Maeve makes plans to move back to Ireland where she has bought a house in Cormeen, County Cavan, but she dies on February 14, 2004.