Máire was an Abbey Player from 1967-1999. She has appeared in over 150 productions at the Abbey Theatre. Among her favourites are The Loves of Cass McGuire, The Cherry Orchard, Famine, The Playboy of the Western World, The Hostage (Best Supporting Actress Evening Herald), A State of Chassis, The Plebians Rehearse the Uprising, Innish, Uncle Vanya, Finders Keepers (Irish Times Theatre Award nomination for Best Supporting Actress), Ulysses in Nighttown and April Bright. Ghlac sí páirt ina lán léirithe as Gaeilge ina measc An Baile Seo ‘Gainne, Cúirt an Mheáin Oíche, Séadna, Scéal Scealaí agus Cré na Cille. Other theatre work includes The Loves of Cass McGuire (Broadway), An Triail (Damer Theatre), The Liar, Best Supporting Actress Theatre Festival (Gate Theatre), Spokesong (Player Wills Theatre), Children of Eve, Best Supporting Actress Evening Herald(Andrews Lane) , Translations (Hampstead and Lyttelton Theatre), Sharon’s Grave (Druid), Factory Girls (Kilkenny) and Long Day’s Journey into Night (Leatherhead Theatre). Television work includes Going into Exile, The Country Boy, Glenroe, O’Flaherty VC, Ballykissangel, The Loves of Cass McGuire, Mother Courage and The Clinic (RTE), DDU and The Hanging Gale (BBC and RTE), Z-cars and The Pallisers (BBC) and Ros na Rún (TG4). Film work includes The Fighting Prince of Donegal, Ulysses, Here are Ladies, Tubberware, Ar Dover Féin, Dillusc and 4 Bhanríon.