At 18, signed to EMI Music Publishing as a songwriter whilst establishing himself as an in-demand session keyboard player/programmer working with the likes of Bryan Adams, Gary Barlow, Harry Gregson Williams and The Lemonheads. During this time, he co-wrote and produced two albums for the band Think Twice achieving two top 10’s in Japan.
With fellow writer/producer Sacha Collisson, their band Aurora was signed to EMI/Positiva in 2001 achieving 4 UK Top 20 records and a UK No. 5 with a cover of the Duran Duran hit Ordinary World. During this time Simon co-wrote and produced with fellow Air Edel writers James Shearman and Sam Babenia the title track of the Charlotte Church Dream a Dream album, selling over 3 million copies worldwide.
Film work followed, including producing the Mann/Weil songs for the Muppets Treasure Island movie alongside film composer Hans Zimmer, and additional music for the Bond movie Tomorrow Never Dies. Simon worked closely with composer Patrick Doyle down at Shepperton Studios on the movies Nanny McPhee, Harry Potter The Goblet Of Fire and as music editor on the Richard E. Grant movie Wah-Wah. In 2009, Simon was invited to LA by composer John Powell to work alongside him on the score of Ice Age 3 “Dawn of the Dinosaurs”.
A keen advocate of composers’ and musicians’ rights, Simon returned to London to work as a consultant for ASCAP (American Society of Composers, Authors and Publishers) the biggest performing rights organisation in the US. In 2010, he was appointed the Director of Film and TV for UK/Europe and in 2011 became an Executive Board Member of the World Soundtrack Awards. In 2016, Simon was promoted to Vice President of Membership UK/Europe running the team from the London ASCAP offices. Recent notable signings include Dua Lipa, Rag ‘N Bone Man and Nana Rogues (Drake’s Passionfruit).