Early in her career, Tynan became acquainted with the British composer Judith Weir. Tynan performed in recordings of works by Weir, including Natural History and The Welcome Arrival of Rain. Weir's song cycle Nuits d’Afrique was composed in 2015 specially for Tynan.[4][5]
She performs internationally and has sung at concert halls and opera houses in Ireland, the UK, the US, Germany, Italy and Sweden. Tynan has appeared in productions of The Marriage of Figaro, Der Rosenkavalier and Albert Herring.[3] At the BBC Proms, Tynan performed Reinhold Glière's Concerto for Coloratura Soprano and Orchestra.