Callum was a member of the opera course at the Royal Academy of Music, London, where he was awarded the Harry Fischer Memorial Prize, graduating with distinction in 2009. Callum was awarded the Glyndebourne on Tour 2009 Donald A Anderson Award. In a flourishing collaboration with Les Arts Florissants, Callum has performed The Fairy Queen on tour in Paris, Caen and New York with William Christie, The Indian Queen with Paul Agnew, Phobétor Atys and a series of concerts in France, Spain and the US entitled Le Jardin de Monsieur Lully, Pluto in Charpentier’s La descente d’Orphée aux Enfers and Adonis in Blow’s Venus & Adonis (Cohen). Recent engagements include Masetto Don Giovanni at Garsington Opera and at the Birgitta Festival in Estonia and Polyphemus Acis & Galatea at the Festival de Thiré (William Christie). Future engagements include Plutone L’Orfeo for Silent Opera and Hippolyte et Aricie for Glyndebourne Festival.