His first CG-animated short film 50 Percent Grey received an Academy Award nomination for Best Animated Short Film in 2001. His follow-up Silent City starring Cillian Murphy marked Ruairí's transition into directing live action, followed by the award-winning short film Blinky (starring Max Records from Where the Wild Things Are), and Imaginary Forces, shot in Dublin and Detroit. The Last Days on Mars is Ruairí's feature film debut. Other feature projects in development include The Fallen with producer Kris Thykier and Lionsgate Films, and The Leviathan with screenwriter Jim Uhls (Fight Club) with producers Michael Shamberg & Stacey Sher.