Simon has been in Kaiser Chiefs since they began in 2003. Before that he was involved in the Leeds Music Scene working in various bars and venues in the city as well as playing in other local bands. Since 2003 as well as Kaiser Chiefs. Simon has released a few records by other musicians via his label Chewing Gum records and performed as a tour musician with a few other bands. Simon works with Amnesty international on various projects as part of his role as an ambassador. He also supports and talks a lot about Leeds United.