RTÉ broadcaster and Prime Time presenter David McCullagh will join the Six One News from September as a permanent presenter from this September.
Mr McCullagh, who also presents the This Week programme on Radio One, will join Caitriona Perry on the flagship programme from autumn.
He has worked on Prime Time for seven years and is a former political correspondent.
Director of RTÉ News & Current Affairs Jon Williams called Mr McCullagh “one of Ireland's most formidable journalists."
“There could be no-one better equipped to join Caitriona on Six One as Ireland emerges from this emergency facing some difficult challenges, and heads towards the centenary of the foundation of the State,” he said.
Mr McCullagh said that he is looking forward to starting his new role. He takes over the role from Keelin Shanley, who sadly passed away earlier this year.
“After seven very enjoyable years on Prime Time, I'm really looking forward to joining Caitríona on the Six One News and continuing the work of our much loved colleague Keelin Shanley," he said.
Over the last few months the need for accurate information has never been greater, and viewers have turned to RTÉ News and Current Affairs in astonishing numbers. We aim to continue meeting that need, bringing viewers all the news of the day, as well as the big interviews that get to the heart of the issues."
He graduated with a PhD in Politics from University College Dublin and began his career at the Evening Press from 1989.
He joined RTÉ in 1993 as reporter and went on to be a Political Correspondent at the station for 12 years before joining Prime Time in 2013.
In 2018, he rejoined the This Week team on RTE Radio 1 as a presenter of Ireland's longest running current affairs programme.
Mr McCullagh has also authored four books: A Makeshift Majority: the first Inter-party Government (1998) The Reluctant Taoiseach: A biography of John A. Costello (2010) and a two volume biography of Éamon de Valera, Rise (2017) and Rule (2018).
David has also researched and presented Behind Closed Doors, on the release of State Papers under the 30 year rule, Declaring the Republic and Election '18 recreating the results of the 1918 general election. He is author of four books:
Co-presenter Caitriona Perry welcomed the news: "David brings vast experience as a presenter and as a correspondent to the Six One News. I'm very excited about our new partnership and look forward to working with him and the team to take the programme into the next phase."
She has been an anchor of the programme since 2018 and was a Washington Correspondent prior to her appointment, where she covered the Berkeley tragedy, US Presidential election and Inauguration.
Ms Perry has also previously spent time as an editor and reporter on the News at One radio programme and as a newscaster for RTÉ Radio 1, RTÉ 2FM and RTÉ lyric fm, and occasional presenter of RTE News Specials, RTÉ Morning Ireland and several special Nationwide programmes on Canada, Australia and the Irish in the White House.