Ciarán O’Connor is a Senior Analyst at ISD UK, where he specialises in investigating extremism online. His research focuses on far-right movements, conspiracy theories and information operations, with particular expertise on Ireland. He co-led ISD’s Uisce Faoi Thalamh series, a large-scale investigation into Ireland’s online mis- and disinformation ecosystem. He appears regularly in Irish and international media. Before joining ISD, he worked as an investigative journalist at Storyful and studied in Dublin City University and the University of Amsterdam.