Born and raised in a small city on Israel’s Mediterranean coastline, Guy Sion started playing the saxophone at the age of nine. At thirteen he joined his city youth band and toured Spain, Germany, the Netherlands and China. That was also the year when Guy was introduced to Jazz. In 1998 he attended the Jazz Summer Workshop in Perugia Italy, winning a scholarship to Berklee College of Music. In 2000, he continued his higher studies at Rimon School of Music and was active in the Israeli jazz scene. He performed at different venues and festivals across Israel with his own group and with various big bands.
In 2002 Guy relocated to the Netherlands to begin his studies at the Conservatory of Amsterdam. During his studies, he performed regularly at jazz clubs and cafés around town, was part of the house band for 3 years in the monthly festival ‘Breathing Bijlmer’, a festival that introduces new talents in a multicultural setting. In April and May of 2003, he toured with the famous Dutch theatre actress Jetty Mathurin in the ‘Mathurin Meets Music’ Tour. In 2004, he also joined the Amsterdam-based band “Or Le Israel". The band performed different styles of music from Pop to Klezmer and played at events all over Europe.
In December 2005, after graduating, Guy moved to New York City. Inspired by the city’s life and rich music scene he continued to develop his own voice, composition, and arranging skills. During those years, he played at various music venues across the city and also worked as a saxophone teacher. In May of 2009, he was invited to play a solo piece on ‘Pictures at an Exhibition by Mussorgsky with the New Amsterdam Symphony Orchestra (NASO). 2010 was the year Guy released his first album ‘Half the Battle’ introducing 6 original compositions inspired by the period living in NYC.
In late 2010 Guy relocated to Oslo, Norway, and has been working as a music teacher in the Oslo area. In July 2011 Guy performed in Molde Jazz Festival with his Lennie Tristano tribute band 'Crosscurrent'.
In January 2012 Guy released his second album 'Away' featuring Norwegian Guitar-master Bjørn Vidar Solli. 'Away' got great reviews in Allaboutjazz.com as well as in the Norwegian media (NRK P2 Kulturnytt, Aftenposten, Dagsavisen).
Since 2013 has been playing the 1st Alto chair with both Primetime Orchestra (Bærum) and Ett Fett Storeband (Lillestrøm). Guy is co-leading "The Diaspora House", a band that delivers Jewish music from around the world (Ashkenazi, Sephardic Mizrahi) in a Jazz setting.