Declan graduated from the Royal Central school of Speech and Drama in 2013, Theatre credits include; A Midsummer Nights Dream (Tooting Arts), Belfast Boy (Arcola Theatre), AfterShakes (Oxford Playhouse), Shawshank Redemption (Bill Kenwright ltd UK TOUR), Screens (Theatre 503) The Revengers Tragedy (The Nottingham Playhouse) Early Birds, (Q Productions), Our Boys (Q Productions). In 2014 Declan was awarded The Stage Award for Acting excellence for his role in Belfast Boy.