Writing has been a hobby for most of Katy's adult life, taking the form of children’s stories, and a large swathe of autobiography after the death of her mother in 2010. Katy started writing poetry after the death of her father, the poet Derek Mahon, in 2020, and since then, she has taken several writing courses, including two with Helen Ivory through the National Centre for Writing/UEA. She also won a place on Gallery Press's Gallery Goes Workshopping with Grace Wilentz. Katy has undertaken a collaboration with English seascape artist Carolyn Coles for York Open Studios 2021, where she recorded poems as a soundscape for the artwork. Her poems have appeared in a number of Irish and English journals, most recently HOWL New Irish Writing, Bad Lilies and Poetry Birmingham Literary Journal. Katy was New Irish Writing's featured poet in the Irish Independent in February 2022, and her debut chapbook was published by Dreich in June 2022.