This standard is written in two parts. The first part is a summary of basic training and knowledge that an employee or contractor shall possess in order to be identified as a rig site drilling fluids technologist or rig site drilling fluids engineer. The first part covers basic skills as would be taught in an entry-level fluids school program. The second part covers a set of advanced skills that will be required in order to support complex wells at the rig site. Levels of understanding for both core and advanced skills have been generally outlined but not totally defined.