K-1 WGP - Team Sefo (2002 - 2013)

Jayson began his coaching career in 2002 after being appointed by Ray Sefo as the Head Instructor for the Ray Sefo Fight Academy in Waitakere Auckland. At that time helping produce notable champions Rony Sefo, Jordan Tai, Paula Mataele and help Ray Sefo to four consecutive K-1 WGP Final 8 tournaments, K-1 World Grand Prix 2002, K-1 World Grand Prix 2003, K-1 World Grand Prix 2004 and K-1 World Grand Prix 2005.

Jayson has continued to maintain his connection with Team Sefo from Japan, throughout the following years helping train Doug Viney for K-1 and Jordan Tai for K-1 Max WGP competition in Japan. He prepared Ray Sefo for the K-1 World Grand Prix 2006 and helped corner Ray Sefo for the K-1 World Grand Prix 2008 Final and K-1 World Grand Prix 2010 in Seoul Final 16.