Career
She writes for the Sunday Independent. O'Hanlon's work appears in The Field Day Anthology of Irish Women's Writing. O'Hanlon is known as one of Sinn Féin’s most ardent critics.
She has also written of her opposition to emigration from Ireland, frequently arguing that this has damaged and continues to damage the nation, and has also voiced disapproval of transgender people in her work. Her elder sister was the late PIRA volunteer and Sinn Féin politician, Siobhán O'Hanlon. The two sisters remained estranged at the time of Siobhán's death from breast cancer, as Eilis is staunchly anti-physical force republicanism and heavily critical of Sinn Féin.
