Kezia studied at the Brit School, the Guildhall School of Music and Drama and Benjamin Britten International Opera School, Royal College of Music. Kezia is a Solti Te Kanawa Academia di Bel Canto alumna.

Recent engagements include title role Carmen and Beppe L’amico Fritz (Opera Holland Park), Suzuki Madama Butterfly and 2nd Lady The Magic Flute (Welsh National Opera) and Silvia (The Messenger) Orfeo (Opera North), Sesto La clemenza di Tito (Chelsea Opera Group), recording Leontina L’esule di Roma (Opera Rara) and a return to Glyndebourne Festival in 2024.

She was a member of the Glyndebourne Chorus from 2015-17, and went on to make her Glyndebourne Festival début as Cornelia in David McVicar’s iconic Giulio Cesare, conducted by William Christie, and later that year as Dorothée Cendrillon (directed by Fiona Shaw) in her début for Glyndebourne on Tour. In 2019 she appeared as Second Lady The Magic Flute for her Welsh National Opera début where she soon returned to sing Forester’s Wife (and cover Fox) Cunning Little Vixen.

Other opera engagements have included La Frugola Il tabarro and Gianetta Don Bucefalo (Wexford Festival Opera), Miss Jessel Turn of the Screw (Barnes Festival), Iside Giove in Argo and Tauride Arianna in Creta (London Handel Festival), Concepcion L’heure Espagnole and Doralice La gazzetta (RCM) Marcellina Le nozze di Figaro (British Youth Opera) and Dido Dido and Aeneas (Glyndebourne Youth Opera).