Born in Dublin, he trained at the College of Music, the Royal Academy of Dramatic Art in London and the Lee Strasberg Theatre & Film Institute in Hollywood, later earning a Master's Degree from Trinity College Dublin alongside qualifications in music, marketing and management (A.R.I.A.M., L.T.C.L., Adv. Dip. Mktg., B.Sc. (Mgt.), M.A.).
He made his Royal Opera House (Covent Garden) debut at twenty-one and went on to create roles in the Covent Garden Festival under Simon Callow. Stage credits since include The Phantom of the Opera, Hairspray, Chicago (Mary Sunshine, West End and UK tour, 1997–2004), the world premiere of The Dead at the Abbey Theatre, London Road at the National Theatre, the London premiere of An Apple A Day, Playboy of the Western World, and singing duties on Bill Whelan's Postcards from Connemara, whose US premiere he gave at Carnegie Hall.
As a long-time member of Riverdance he has performed as solo singer on Broadway, in the West End, on world tour and on the Riverdance: Live from Radio City Music Hall video. In 2018 he took the role of Giordano Bruno in Roger Doyle's electronic opera Heresy, released by Heresy Records and praised by the Irish Times. In 2009 he joined Cirque du Soleil for a series of aerial performances around the company's 20th anniversary.
Beyond performance, Morgan directs choirs, opera and theatre and works worldwide as a vocal coach and mentor. From Dublin's annual open-air opera season at the Wood Quay Amphitheatre to workshops, festivals and sacred-space concerts across Europe, the US and beyond, he works regularly as a vocal mentor, choral director and stage director.
On screen he has appeared in the BBC's EastEnders and Lovejoy, History's Vikings, Ron Howard's feature Far & Away, The Snapper and the 2017 film Pilgrimage. Broadcast credits include the BBC Proms, BBC Radio 2's Friday Night Is Music Night, RTÉ's Late Late Show, RTÉ's Sunday Miscellany, the Yule Be Wiggling holiday special and the Paris NEMO Festival, alongside chat-show appearances with David Letterman, Terry Wogan and Gloria Hunniford.
As a recording artist his solo releases include Out of the Blue (Gate Records, 2000), Snapshots (2005), West End Wounds, Broadway Bruises (2008) and As Large As Alone — praised by Brian May, Bill Whelan and the New York Times. He is also a long-running collaborator of the Grammy-winning children's group The Wiggles.