Born in France, Claire Thirion studied at the conservatoires (CNR) in Marseille and Boulogne-Billancourt, then at the Paris Conservatoire (CNSM), before entering the Royal College of Music in London to study with Jérôme Pernoo and Catherine Rimer (Baroque cello).
In 2006 she was awarded the prestigious Tagore Gold Medal.
Since completing her studies, Claire has been in great demand for the performance of both modern compositions and Baroque works. In 2008-2010 she held the position of principal continuo player with Emmanuelle Haïm's ensemble, Le Concert d'Astrée.
Claire works regularly with the London Symphony Orchestra, Orchestra of the Age of Enlightenment and BBC National Orchestra of Wales, and is frequently invited as a guest leader for projects on period instruments with various ensembles, including BandArt and Bel Air Chamber Orchestra.
As an active soloist and chamber musician she regularly performs in France and other European countries either as part of her duo together with Karine Selo, Boris Garlitsky or Christophe Coin.