Though known primarily for his  work as founder/ writer  in The High Llamas and long time collaborator in Stereolab ,Sean O'Hagan has spent 20 years investigating methods which push avante garde pop into total arrangement , forging links  between  Italian  and  French soundtrack , 60s Brazilian Tropicalia and  European electronic music.

 His  approach to arrangement has been endorsed around the world and is  consistently invited to collaborate  as arranger  with an eclectic  range of contemporary artists including  Paul Weller, The Coral, Stereolab, Super Furry Animals , Doves, Cornelius, St Etienne ,Brazil's Vanessa D'Mata  , Norway's Sondre Lechre and Tim Burgess.

Sean is now establishing himself  along with Tim Gane as the film composers in French cinema  who reconnect the directors and audiences with classic neon sound of , 60s and 70s  orchestral European soundtrack as  in recent films  , La Vie D'Artiste (2009), Copacabna (2010) and the  soon to be released Pauline Detective. Sean also provided the  soundtrack to Kieron Murphy's  first  US movie  Sunburn (2000) and  was  recently engaged  to write for the  cult US TV show Yo Gaba Gaba .The music of the High Llamas has  15 years , found its way into a host of UK and European Terrestaial TV shows .

He  works extensively in contemporary European art installation (Musical Painting 2003) ,(Musical Wheel 2007) as well as occasionally  acting as musical director for  institutes  such as  the Barbican (Tropicalia season )and  the Southbank  (Meltdowns Lost ladies of Folk  2009 ).