Paul studied Animation in BCFE followed by Visual Art in Waterford Institute of Technology. In 2009 in conjunction with Waterford City Council Paul set and ran Soma Contemporary till 2012, working with many national and international institutions and artists.
He has exhibited widely over the past ten years and in 2018 he won the Golden Fleece Award. In recent years he has had exhibitions at The Complex (Dublin), Royal Hibernian Academy (Dublin), The Lab (Dublin), Berlin Opticians Gallery (Dublin), Roscommon Arts Centre and in 2019 he was part of a two-person exhibition that was shown in the Lexicon Gallery Dublin, Garter Lane Gallery Waterford, Sternview Gallery Cork and Platform Arts Belfast. In 2021 he Hallahan was the overall winner of the ‘Hang Tough Open Call’ Instagram competition.
Paul’s work is part of the collections of The Arts Council of Ireland, dlr County Council, Industrial Development Agency Ireland (IDA), Trinity College Dublin, The Office of Public Works, Waterford City Collection and numerous private collections.
In 2020, Paul moved from Dublin to the northwest and is now based in Bundoran, Donegal.