John O'Neill is a former professional football player from Ireland, known for his skills as a midfielder. He began his career in the late 1990s and played for several clubs, including Cork City and Derry City. O'Neill was recognized for his strong work ethic and ability to control the game from the midfield position. Throughout his career, O'Neill also represented the Republic of Ireland at various youth levels. His contributions to the teams he played for earned him respect among fans and teammates alike. After retiring from professional play, he remained involved in football through coaching and mentoring young players.