Rex trained at The Gaiety School of Acting, Dublin. He is currently appearing in the role of Ernest Hemingway in Eddie Naughton's BULLFIGHT ON THIRD AVENUE directed by Karl Shiels at the Dolmen Theatre.
Rex is Artistic Director of Glass Mask Theatre Company; the Resident company of Smock Alley Theatre Dublin, 2018/2019. Rex recently performed in a critically acclaimed debut production for Glass Mask; IDLEWILD - A gangland Tragedy by Associate playwright Jimmy Murphy.
Other recent theatre credits include QUICKSAND by Elizabeth Moynihan at the New Theatre, Philip Ridley's TONIGHT WITH DONNY STIXX directed by Karl Shiels at the Peacock Theatre.,an extensive tour of PILGRIM by Philip Doherty (Manchester Theatre Awards Best Actor Nomination), the title role in HAMLET directed by Peter Reid at the New Theatre, PORT AUTHORITY by Conor McPherson at the Viking Theatre, THE MEMORY STICK by Donal O'Kelly, BUG by Tracy Letts for The Corps Ensemble, Mark O’Rowe’s MADE IN CHINA at The Viking Theatre with The Corps Ensemble, James Joyce in The musical MAGISTORIUM, HOLLOW GROUND directed by Karl Shiels for Theatre Upstairs, THE MOTHERFUCKER WITH THE HAT directed by Aoife Spillane Hinks for The New Theatre THE CIRCUS OF PERSEVERANCE written and directed by Philip Doherty at Smock Alley Theatre and THE BIRTHDAY MAN by Philip Doherty for which he received a Best Actor Award nomination in the 2013 Dublin Fringe.
Screen Credits include QUANTICO for ABC America, MONGED by Gary Duggan, commissioned by Film Base and the award winning short SOLITAIRE by Gerard Walsh.
Rex is also a highly experienced voice artist working with RTE Radio One on poetry readings and dramas for radio. He is the recent voice of the Ireland under 20’s Rugby television campaign.