O'Sullivan attended Coláiste an Spioraid Naoimh, where he took the Irish Leaving Certificate Examinations. O'Sullivan did not enjoy his time at school. He graduated from Cork Institute of Technology, University College Cork, and University College Dublin, having studied technology and literature.
He is the founding editor of New Binary Press and the author of two collections of poetry. O'Sullivan's first collection of poetry, Kneeling on the Redwood Floor, was released by Lapwing Publications in 2011. O'Sullivan himself did not rate the work very highly.
In 2014, Alba Publishing released his second collection, Groundwork. O'Sullivan writes for the Evening Echo, a regional newspaper in Cork. He has worked particularly closely with Feis Maitiú Corcaigh, a major cultural festival, as their resident journalist.
O'Sullivan is involved in the study of digital humanities. In 2012, he founded New Binary Press. O'Sullivan was born and raised in Cork city, Ireland.
O'Sullivan has often expressed great affection for his home town. He is the grandson of a locally-famed performer, Billa O'Connell.
