An Irish film director and screenwriter, he is known for his work in the horror and thriller genres. He gained recognition with his feature film debut, "Isolation" (2005), a horror film set on a remote farm. His distinctive storytelling and atmospheric style have earned him a dedicated following. He further cemented his reputation with "I Am Not a Serial Killer" (2016), an adaptation of the novel by Dan Wells. His work often explores themes of isolation, fear, and the human psyche.