He was a member of Leeds Youth Opera for two years before accepting his place at conservatoire, where he made his debut as Martin in Bernstein's Candide. He went on to play Escamillo in Bizet’s Carmen and Papageno in Mozart’s The Magic Flute, the latter of which the Leeds Civic Arts Guild nominated him for ‘Best Male Performer.’ At the Welsh National Youth roles included Count Almaviva in Mozart's Le nozze di Figaro and Aeneas in Purcell's Dido and Anaeas.
In October 2015, he represented the Royal College of Music at the Junior Kathleen Ferrier Awards. Duffield has performed solo recitals and concerts around Yorkshire as well as oratorio and sacred works. Highlights have included Vivaldi's Magnificat and Britten's Rejoice in the Lamb at Ripon Cathedral.
In the summer of 2014 he co-founded the student led company Bitesize Opera. The company is run by young professionals and aims to provide opportunities to singers who are currently studying at conservatoire or are on the threshold of their careers. Most recent performances include a series of Mozart opera scenes where Duffield's roles were the title role of Don Giovanni, Guglielmo in Così fan tutte and Nardo in La finta giardiniera.
Duffield is also a gifted sketch artist and you can view his work online.