top of page
Sion Trefor



  • website
  • IMDb
  • Instagram
  • YouTube
  • Spotify
  • Facebook

Sion Trefor is a composer, performer and producer based in the UK, where he runs a full-service production and recording studio in Cardiff. Established as one of the foremost composers in Wales, Sion is renowned as a virtuoso pianist, multi- instrumentalist and producer, a one man powerhouse of composition, performance and production in all idioms from classical to cutting edge electronica.

Recent highlights include scores for episodes of the new Netflix show “Freud”, the international version of the Gavin & Stacey Christmas special with James Corden, feature-length documentary 

Minds Wide Open (featuring Charlotte Church) aswell as scores for Disney, Rolex, Aston Martin, Google Arts & Culture, Comedy Central, Nationwide and Saatchi & Saatchi. Another notable branch of his work is music for stage: the multi-media production “The Last Mermaid”, also starring frequent collaborator Charlotte Church and shown at the Welsh Millenium Centre, was met with critical praise across the UK.

Following his debut solo piano release “Fallout”, Sion is currently recording his second piano album to be released under his own name and scoring the feature film Do Not Feed The Animals (British Film Institute, BBC).


Fallout - Sion Trefor


Collisions - Sion Trefor



Sion is working with a growing number of high profile clients around the globe, including:

Netflix Logo
Rolex Logo
Nation Geographic Logo
Saatchi & Saatchi Logo
Comedy Central Logo
BBC Logo
Disney Logo
bottom of page