Australian-born baritone James Roser initially began a career as an environmental scientist, having completed a Bachelor of Advanced Science (Honours) at the University of NSW, before beginning his musical studies. He was a recipient of a number of major singing awards in Australia, including the Mietta Song Recital Award, Vienna State Opera Award and Britten-Pears Young Artist Award, was a young artist with Pacific Opera and has performed with the Vienna State Opera, Opera Queensland, Victorian Opera, Sydney Symphony Orchestra, Tiroler Festspiele Erl, Beijing Music Festival, Shanghai International Arts Festival, Opéra de Baugé, Staatsoper Cottbus and State Opera of South Australia. 

Operatic roles he has performed include Rigoletto, Germont (La Traviata), Amfortas (Parsifal), Beckmesser (Die Meistersinger von Nürnberg), Gunther (Götterdämmerung), Don Pizarro (Fidelio), Wotan (Das Rheingold), Faninal (Der Rosenkavalier), Don Magnifico, (La Cenerentola), Dulcamara (L’Elisir d’amore), Leporello, Don Giovanni, Il Conte (Le Nozze di Figaro), Guglielmo (Cosi fan tutte), Papageno (Die Zauberflöte), Allazim (Zaide), Wiedhopf (Die Vögel), Owen Wingrave, Escamillo (Carmen), Peter (Hänsel und Gretel). His performance as Rigoletto with the Tiroler Festspiele was televised on Servus TV and that of Wiedhopf in ‘Die Vögel‘ was televised on ORF. 

He has performed in recitals across Europe, as well as in Australia, Canada and the United Kingdom, performing for the Franz Schubert Institut, Oxford Lieder Festival, Britten-Pears Young Artist Programme, Gesellschaft für Musiktheater Wien, Opera Queensland, Artsong NSW, Chamber Music Australia, Rainhill Music Festival, has appeared as a soloist with the Australian Brandenburg Orchestra and has been broadcast a number of times in Australia on 2MBS-FM, 3MBS-FM and ABC Classic FM, as well as ORF and Servus TV in Austria and Germany.