Duncan trained at the Conservatory of Music (DIT) and the Royal Academy of Music, London. At the Conservatory he studied organ with Peter Sweeney and voice with Colette McGahon. Progressing from here with a Bachelor of Music, he trained at the Academy with countertenor Michael Chance and Philip Doghan.
Transitioning from singing after his studies here, Duncan became assistant musical director of the West End Gospel Choir and artistic director of Soho Gospel slowly establishing himself as a leading vocal coach and choir director on the London scene. As a singer, Duncan has held contracts previously with the National Chamber Choir Ireland, and the Grammy award-winning ensemble Ars Nova Copenhagen.
He is also the current director of The Brook Singers and of Version 1 Choir.
In 2016, Duncan was awarded a Fellowship of the Royal Society of Arts (FRSA) for his work in arts management as Curator for the Pride in London Festival for 2015 & 2016. He is currently completing an MA at Central Saint Martin’s London in Arts & Cultural Enterprise.