[8][17] Doireann graduated from Trinity College Dublin with a degree in Drama and Theatre studies.
[8][18] Having amassed a following on social media she was commissioned by RTÉ to make a web series, The Doireann Project,[5] based on her impressions.
[27] Separate from her work with RTÉ, Doireann is a "brand ambassador" for Renault, a deal arranged by her agent, Noel Kelly of NK Management.
[29] Doireann was paid to chair a Dáil Éireann conference at Dublin Castle on participation in politics; she admitted that she was unaware why she had been asked to do this.
[30] In addition to her work with RTÉ and other brands, TD Catherine Murphy stated in Dáil Éireann that the publicly-funded Horse Racing Ireland paid €20,000 to Doireann Garrihy to promote the Cheltenham Festival – "an event in another jurisdiction".
[31] RTÉ used boats owned by the Garrihy family business, Dublin Bay Cruises, to host parties.
[35] In January 2025, it was announced that she would be returning to RTÉ 2fm in February as the presenter of the new Drive time show on the station.