Juliet was educated at the Purcell School as a first-study oboist and then at Cambridge University where she read Music and History of Art. It was whilst a student there that she started singing, in the chapel choir of Clare College; subsequently she sang with professional choirs such as Polyphony, Tenebrae, the Monteverdi Choir, The King's Consort, The Tallis Scholars and BBC Singers. In early music, she has worked with European consorts Ensemble Polyharmonique and Gli Angeli Genève. She was a regular member of the soloists of Collegium Vocale Gent, directed by Philippe Herreweghe, for six years, performing and recording Renaissance polyphony by Lassus, Vitoria, Gesualdo and Byrd.
In new music, Juliet has performed as a soloist with Klangforum Wien, ICTUS, Plus-Minus, We Spoke: New Music Company, London Sinfonietta and BBC Scottish Symphony Orchestra in festivals such as hcmf//, Tectonics Glasgow, Transit 20/21, Donaueschinger Musiktage, MaerzMusik and Wien Modern. Recently, she has created duo projects with pianist Mark Knoop and percussionist Maxime Echardour. She has premièred well over 100 works, many of which have been written for her, working particularly closely with composers Michael Finnissy, Bernhard Lang, Rebecca Saunders, Stefano Gervasoni, Frank Denyer, Christopher Fox, Matthew Shlomowitz, Cassandra Miller and Andrew Hamilton.
Juliet is principal soprano of EXAUDI, the acclaimed contemporary music vocal ensemble, which she founded in 2002 with composer/conductor James Weeks and with whom she makes regular appearances at major European festivals such as Aldeburgh, Spitalfields, hcmf//, ManiFeste, Festival d'Automne, Ars Musica, Wittener Tage and Darmstadt Ferienkurse.
Opera roles include Neige in Catherine Kontz's NEIGE at Grand Théatre de Luxembourg (2013), Tina in Limbus Limbo by Stefano Gervasoni at Musica Strasbourg, Automne en Normandie, Opera de Reims and Opera Comique, Paris (2012), and Grace Hartigan in Larry Goves's I do this I do that (2011).
Juliet has been nominated twice for an RPS Award in the Singer category and is currently supported by Aldeburgh Music's Open Space scheme. Her first dedicated solo disc, a recording of Morton Feldman's Three Voices, was released on the HatHut label in November 2016.
As a new music soloist, Juliet is represented by Graham Hayter of CMPromotions.