His career started in 2005 with "Fast Distance" when after nearly 2 years of hard work they signed some of their productions on famous labels such as Armada Music , Monster Tunes, Baroque, Cloud 9 and their tracks are supported by the world biggest DJ's including Armin Van Buuren, Tiësto, Paul Van Dyk, Above & Beyond, Ferry Corsten and many others. Olivier also collaborates on some productions with talented artists such as Roger Shah and Fred Baker. After 2 years of success, Fast Distance decided to split after taking different musical ways. 2010 saw the new turn for Olivier by launching his new project Stonevalley and joining force of the UK Label Enhanced Rec. aside of Will Holland, Ferry Tayle, Suncatcher, Temple One & more. His release Winter & Lost Without You, was massively supported by Above & Beyond on Trance Around The World, Armin Van Buuren on ASOT, and dropped by Ferry Tayle at Trance Energy, with more productions & remixes. In 2021, Olivier joined the UK label Colorize under the name Kozua for a progressive style.