In the early 1960s O'Herlihy began his broadcasting career when he started to do local soccer reports from Cork for
Radio Éireann. In 1965 he made his first television broadcast in a programme commemorating the sinking of the
Lusitania off the Cork coast. He also became involved in the production of various sports programmes. O'Herlihy was not long in the RTÉ Sports department when he became a regular presenter for such programmes as
Sunday Sport and
Sports Stadium. In 1978 he became RTÉ Soccer host alongside Eamon Dunphy, in 1984 John Giles joined the panel and Liam Brady did in 1998. Since 1974 Bill became RTÉ's chief sports presenter for such events as all Olympic Games until
2012,
FIFA World Cups until
2014,
UEFA European Football Championships until
2012 and European and World Track and Field Championships. He hosted RTÉ highlights of the
Ryder Cup in 2006 when it was at the K Club in Ireland and continued to present coverage of Ireland's soccer internationals for RTÉ, along with
Eamon Dunphy,
Johnny Giles and
Liam Brady. He hosted RTÉ's coverage of rugby union in the 1980s and early 1990s. However, when RTÉ attained the rights to cover the
English Premier League in 1992,
Tom McGurk took over as host of RTÉ's coverage of rugby union. O'Herlihy covered the Premier League, Irish Internationals and the Champions League before dropping the Premier League in 2008. He continued to cover the Olympic Games and International Athletic Championships such as the European & World Athletics. He presented the first
Rugby World Cup on RTÉ television in 1987 and, with Jim Carney, co-presented the first edition of
The Sunday Game in 1979. In 2012, while covering
Chloe Magee's progress at the
2012 Summer Olympics O'Herlihy remarked that badminton was once considered "a mainly Protestant sport". RTÉ subsequently received a number of complaints, and while Magee criticised the remarks, the argument was made that the incident inadvertently reflected a complex historical reality. O'Herlihy presented
RTÉ Sport's coverage of the
2010 FIFA World Cup, his ninth FIFA World Cup. He fronted 18 European Championships and FIFA World Cups for RTÉ, the last of which came in
2014. This proved to be the final tournament with O'Herlihy at the helm; he retired at its conclusion and died the following year. At the time of his death, O'Herlihy was working on a sports version of
Reeling in the Years, which RTÉ immediately cancelled. ==Public relations and political advice==