Siobhán is one of a small number of harpists worldwide who play harps from earlier centuries. She has a large collection of copies of instruments from the Middle Ages, the Renaissance and the baroque.
Siobhán was born in Dublin, lives in Ireland and works as a freelance performer and teacher, mainly in Europe. With eclectic interests, she plays seventeenth-century opera and chamber music with the main baroque directors in Europe; has performed as a soloist on Hollywood film soundtracks and gigs at the world's biggest traditional music festivals.
Her great passion is encouraging the revival of the early Irish harp. To this end she founded and chairs The Historical Harp Society of Ireland and is the director of Scoil na gCláirseach—Festival of Early Irish Harp, which takes place each August in Ireland. Among her many historical harp copies, she plays a replica of the medieval Trinity College or Brian Boru harp — the national emblem of Ireland — strung in brass and 18-carat gold. Her solo recording on this instrument, Cláirseach na hÉireann: The Harp of Ireland, was released in 2004.
Alongside her solo work, Siobhán Armstrong performs and records with the leading early music soloists, ensembles, and directors, mainly in Europe but also in North America and Japan.