Doyle joined the RTÉ newsroom in 1978 and read her first news bulletin on Christmas Day that year. She became a regular reader for bulletins on both radio and television news services. In 1983, she became one of four presenters for RTÉ One's early evening news, then known as Newstime. The program was relaunched in 1988 as the Six One News with Doyle becoming co-anchor alongside Seán Duignan two years later. In 1992, Doyle was briefly suspended by RTÉ for refusing to cross picket lines during a technicians' strike.
