[5] In November 2014, Mitchell was appointed the RTÉ News London correspondent after previously worked as deputy foreign editor.
[8] During her time as deputy foreign editor, Mitchell provided extensive coverage of the resignation of Pope Benedict XVI, the State visit by President Michael D. Higgins to the United Kingdom and the 2014 Scottish independence referendum.
[9] As London correspondent, she provided extensive coverage of several major terrorist attacks, the Grenfell Tower fire, the 2015 and 2017 general elections, the birth of Princess Charlotte, the Wedding of Prince Harry and Meghan Markle and the Brexit referendum.
[12] Mitchell grew up in Killeigh, Tullamore, County Offaly and has one sister Frances, and one brother Barry, who lives in the US state Indiana.
[13] On 16 April 2019, Mitchell received the NUI Galway Alumni Award for Arts, Literature and Celtic Studies.