Clíona Cassidy is a Dublin-born soprano, composer, and experimental vocalist working at the intersection of opera and improvisation. She has worked regularly with Scottish Opera since 2012 and is a longstanding member of the Glasgow Improvisers Orchestra.

Her work centres on operatic improvisation. Her song cycle Hiatus was performed at the BBC Scottish Symphony Orchestra’s Tectonics Festival, and she co-created the opera Silk Threads with Raymond MacDonald, featured on BBC Radio 3. She has also been a guest lecturer in improvisation and choral singing at the Royal Conservatoire of Scotland.