Eilish trained in Speech and Drama with the Leinster School of Music and Drama. During her time studying theatre in NUI Galway she won Best Actress at the Jerome Hynes One Act Play Series and was involved in several Dramsoc productions including: The Last Burning, Hamlet, The Hero Returns, and Ariel. She has
The Dead School toured internationally, performing for young audiences with Emerald Isle Theatre Company. This year she wrote and performed The Farmyard Girl, her original show for children, at the Galway Fringe Festival. She is a member of ThereisBear! Theatre company and has toured with them throughout Ireland. In 2014 Eilish became a member of Fregoli Theatre Company and has performed in Mary Mary Mary and Pleasure Ground.
Previous credits under the direction of Andrew Flynn include: Perve, The Adventures of Shay Mouse, Midsummer and The Dead School.