John O'Neill is a talented musician known for his work as a guitarist and songwriter. He gained recognition as a member of the band The 4 of Us, which formed in the late 1980s. The band is celebrated for its catchy melodies and heartfelt lyrics, contributing to the Irish music scene. In addition to his work with The 4 of Us, O'Neill has pursued a solo career, showcasing his versatility as an artist. His music often blends elements of rock and folk, appealing to a wide audience. O'Neill continues to perform and create music, maintaining a dedicated fan base.