Last season Tynan performed Campra’s Le Carnaval de Venise with Le Concert Spirituel and Hervé Niquet on an extensive tour to France and the Netherlands, Haydn’s Creation with Indianapolis Symphony under Douglas Boyd, Vaughan Williams’ Dona nobis pacem with Bergen Philharmonic, Messiah with Bournemouth Symphony and Early Opera Company, Viennese Gala with Royal Scottish National Orchestra, and Carmina Burana with BBC National Orchestra of Wales. She has worked with distinguished conductors including Lorin Maazel, Sir Roger Norrington, Sir Andrew Davis, Gianandrea Noseda, Ingo Metzmacher, Christophe Rousset, Thierry Fischer, Richard Hickox, Paul McCreesh, Edward Gardner, Jaap van Zweden, Ilan Volkov and Andrew Litton.

Tynan is also in great demand in contemporary repertoire. She has sung Dallapiccola’s Partita with BBC Philharmonic Orchestra at the BBC Proms, Unsuk Chin’s Kala with BBC Symphony Orchestra, Megan in James MacMillan's The Sacrifice at Welsh National Opera, Monique in Elizabeth Maconchy’s The Sofa for Independent Opera and Pretty Polly in Birtwistle’s Punch and Judy at Casa de Musica.

In the 2011/12 season Tynan returns to the ENO to reprise the acclaimed role of Adina The Elixir of Love, and makes her role debut as Cleopatra Giulio Cesare at Opera North. She also sings Mahler’s Symphony No.8 under Lorin Maazel as part of Philharmonia’s Mahler Cycle. In the future seasons, Tynan will make her debuts at the Teatro Real, Madrid and Théâtre des Champs-Élysées, Paris.

Tynan studied at the Royal Northern College of Music and the Royal Academy of Music where she was awarded the Queen's Commendation for Excellence. She was invited to join the English National Opera Young Singers Programme, and later an ENO Company Principal, a position she held until 2006/7. She can be heard in recordings of The Italian Girl, Hansel and Gretel, The Marriage of Figaro, and The Carmelites by Chandos Records.