She has appeared in opera at the Salzburg Festival, Bayerische Staatsoper, Festival d'Aix en Provence, Opera de Lille, the Baltic Sea Festival, Aldeburgh Festival, Scottish Opera and Opera North, and her roles include Fricka, Waltraute, Second Norn, Lady de Hautdesert, Lucretia, Suzuki, Dido, Hänsel, Third Lady, Mrs Herring, Giovanna Seymour, and Agrippina.
She has performed with many of the world's great orchestras in repertoire spanning the centuries, from Bach's St Matthew Passion with the Dallas Symphony Orchestra and Jaap Van Zweden, to Mahler's Second Symphony with the São Paulo State Symphony Orchestra under Alondra de la Parra, to Jocasta in Stravinsky's Oedipus Rex with the London Symphony Orchestra under Sir John Eliot Gardiner for his 70th birthday, to be released as an LSO live disc. She has also worked with Sir Andrew Davis, Kent Nagano, Bernard Haitink, Ingo Metzmacher, Daniel Harding, Bernard Labadie, Kiril Karabits, David Atherton, Thomas Dausgaard, Thierry Fischer, Leonard Slatkin, Harry Bicket, and Martyn Brabbins. She made her Carnegie Hall debut in Beethoven's Missa Solemnis with Sir John Eliot Gardiner and the Orchestre Revolutionnaire et Romantique, and her BBC Proms debut in Beethoven's 9th Symphony with Vasily Petrenko and the National Youth Orchestra.
A member of the Prince Consort and a noted recitalist, she made her solo recital debut at the Wigmore Hall with Joseph Middleton broadcast live on BBC Radio 3. She has appeared at the Cheltenham, City of London, Brighton, Perth and Aldeburgh Festivals and at the Sage in Gateshead, and broadcasts regularly on BBC Radio 3. Her growing discography includes Britten Songs with Malcolm Martineau for Onyx Classics, and Thuille Songs with Joseph Middleton for Champs Hill Records.
Jennifer's engagements in the 2013-4 Season include Hedwige/Guillaume Tell in a new production at the Bayerische Staatsoper, Lady de Hautdesert/Gawain with the BBC Symphony Orchestra/Brabbins for Birtwistle's 80th Birthday, Mrs Sedley/Peter Grimes in Beijing, Mrs Noye/Noye's Fludde with the BBC Scottish Symphony Orchestra/Brabbins, Bruckner's Mass No.1 with the Bayerische Rundfunks/Sir John Eliot Gardiner, Bach's St Matthew Passion with the Hong Kong Philharmonic/Van Zweden, the world premiere of Payne's orchestration of Vaughan Williams' Four Last Songs with the BBC Symphony Orchestra/Vänskä at the BBC Proms 2013, Beethoven's 9th Symphony with the ORR/Sir John Eliot Gardiner in Lucerne, Missa Solemnis with the CBSO/Ex Cathedra, Copland's In the Beginning with the BBC Singers/Hill, Mahler 3 with the Royal Philharmonic Orchestra/Mandeal at the Enescu Festival, Mahler's Second Symphony with both the Philharmonia at the Three Choirs Festival and the Bournemouth Symphony Orchestra, Elgar's The Dream of Gerontius with both the Bournemouth Symphony Orchestra and the Bach Choir, Mozart's Requiem with both the Royal Liverpool Philharmonic and Bournemouth Symphony Orchestras, Handel's Messiah with the English Concert/Bicket, Haydn's Paukenmesse with the Royal Liverpool Philharmonic Orchestra, Durufle's Requiem with the Britten Sinfonia/Cleobury, Rorem's Evidence of Things Not Seen at the London Song Festival, and recitals at the Wigmore Hall with the Prince Consort.