Aaron trained at The Samuel Beckett Centre, Trinity College Dublin. His recent work includes Stones In His Pockets at Macarter Theater, Princeton. He has worked worked extensively with the Abbey Theatre in King Lear (2013), 16 Possible Glimpses (2011), Christ Deliver Us! (2010), Arrah na Pogue (2010), Tales of Ballycumber (2009), She Stoops to Conquer (2003); and with Druid Theatre Company, of which he is an ensemble member and with which he has toured internationally in Waiting For Godot (2016-18), Shelter (2018), The Beauty Queen of Leenane (2016), DruidShakespeare (2015), DruidMurphy (2013), Penelope (2011), The Silver Tassie (2009), The Walworth Farce (2006), Empress of India (2006), DruidSynge (2005) and The Playboy of the Western World (2005). He has also worked with companies such as Fishamble, Bedrock, Yew Tree and Livin’ Dred, which he co-founded in 2004. His film and TV work includes Assassin’s Creed, The Foreigner, Maze, Float Like a Butterfly, Love/Hate, Vikings, The Tudors, Inspector Jury, Hideaways, The Other Side of Sleep and Clean Break, amongst others. He is a recipient of a Lucille Lortel Award, Manchester Evening News Award, an Irish Times Irish Theatre Award and an OBIE Award for Outstanding Performance.