After winning the Vivian Ellis Prize for Young Writers of Musicals,

Jason was invited by Peter Hall to compose Born Again (a musical of Ionesco's Rhinoceros), produced at Chichester Festival Theatre starring Mandy Patinkin and José Ferrer.

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As Associate Composer at Chichester, Jason wrote music and lyrics

for two new musicals: The Water Babies and Six Pictures of Lee Miller (nominated for the British Composer Awards). His version of Dickens' A Christmas Carol, written with Bryony Lavery, has played Chichester, Birmingham Rep and West Yorkshire Playhouse. Jason has also composed incidental music for over 50 plays, including 17 productions for the late Steven Pimlott.

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Orchestration credits includes the Menier Chocolate Factory's Sunday in the Park with George (the Broadway transfer winning Jason the Drama Desk Award and a Tony Award nomination for Best Orchestrations), La Cage aux Folles (a second Tony nomination) and A Little Night Music (also Broadway). Other credits include Richard Jones' acclaimed Annie Get Your Gun at the Young Vic, with its now infamous line-up of four pianos!

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Jason has accompanied many notable singers including Elisabeth Welch, Betty Garrett, Kitty Carlisle Hart, Michael Ball and Dame Felicity Lott. A long association with Maria Friedman includes arrangements for her Olivier award-winning show By Special Arrangement and her CD Maria Friedman sings the Great British Songbook.