Siobhán Armstrong is a performer, artistic director, academic, passionate educator and mentor, and one of Europe’s foremost harpists playing pre-1800 repertory, on reconstructions of medieval to baroque harps. She performs and records with many of Europe's most prestigious early-music soloists and orchestras (Les Arts Florissants, Paris; The Academy of Ancient Music / Orchestra of the Age of Enlightenment / Florilegium London; Akademie für Alte Musik, Berlin) at venues including Wigmore Hall, London, the Concertgebouw, Amsterdam; the BBC Proms at the Royal Albert Hall, London; the Zankel Chamber Music Series at Carnegie Hall, NY; Izumi Hall, Osaka; and has recorded with Deutsche Grammophon, Sony, Virgin Classics, Linn, Dorian and Delphian, among others.

A versatile musician, Siobhán is at home playing 17th-century opera in some of the world’s most prestigious opera houses [Royal Opera House, London; Teatro Real, Madrid; The Netherlands Opera, Amsterdam], performing as a soloist on a Hollywood film soundtrack [MGM’s Merchant of Venice with Al Pacino] and gigging at some of the world's best-known traditional music festivals [Lorient, France; Panceltic, Ireland; Celtic Connections, Scotland].

Playing pre-1800’s Irish music, Siobhán collaborates with some of Ireland’s best-known traditional-music performers: Roísín Elsafty, Ronan Browne and Doimnic Mac Giolla Bhríde. She is the founding director of The Historical Harp Society of Ireland, spearheading the international rediscovery of Ireland’s ancient harp, strung in brass wires. In 2015, she located a lost, historic Irish harp, and in 2016 she commissioned the first ever 3D-laser scan of a musical instrument at The National Museum of Ireland. She completed her PhD in the area in 2020 (Middlesex University, London). The debut recording of her ensemble, The Irish Consort, entitled Music, Ireland and the Sixteenth Century, has shed light on a neglected century in Irish music. This was one of The Irish Times’ top five international Classical Music picks of 2021.

Siobhán is an Occasional Lecturer at the School of Music, University College Dublin, and Visiting Harp Tutor at The Irish World Academy of Music And Dance, University of Limerick.