Langston is a leading composer and producer of Scottish Musicals and pioneered musical theatre education in Scotland in a unique collaboration between Stow College and the University of the West of Scotland. He studied composition with John McLeod CBE at the London College of Music and was awarded an FLCM in 1992. Stephen's compositions and musicals (including The Green Door - Robertson and Langston, Faeries - McPike and Langston, Sheherezade - McCrumb and Langston and Wallace - Sutherland, McCrumb and Langston) have been performed all over the UK and he has produced over 100 theatrical productions across Scotland.

Langston is sought after as a musical director in theatre and the concert platform conducting numerous professional and amateur groups including orchestral, choral, brass band and popular music combinations. As an academic he is Programme Leader for Performance at the University of the West of Scotland and was recently awarded a PhD in 'The Golden Ratio as an Influencing Factor within the Compositional Structure of Sung through Musicals'. His research has led to several international press articles and publications in The Conversation, The Sunday Times, The Sunday Mirror, and the Daily Star reaching out to over 1.6 million article views.

He was recently asked to arrange the music for the Outlander Series six launch in Glasgow 2022 and is currently composing A Scottish Fantasia for Choir and Orchestra with a performance in Glasgows Royal Concert Hall in June 2023.