Doireann graduated from Trinity College, Dublin, with a Bachelor in Law and French. While in college she was the treasurer of FLAC and was part of the Scéim Chonaithe (Student Residency Scheme) promoting the Irish language. Doireann is from the Gaeltacht Rath Chairn in Meath and is a fluent Irish speaker and also speaks German. She plays Irish traditional music and regularly plays the concertina and flute in Temple Bar. Doireann has a keen interest in immigration law and international human rights law. She is currently on six month secondment from Arthur Cox at the Immigrant Council.