Si-bak Clever started his WingTsun career in 1987 under the auspices of the EWTO and his sifu, Grandmaster Keith Kernspecht. He trained at Castle Langenzell, the European headquarters for WingTsun, and ran a full time WingTsun school in Langen, near Frankfurt. In 2001 he relocated to the United States with his family and has continued his training under the IWTA-NAS. He was awarded the Second Technician Level in 2005 by Grandmaster Leung Ting.