The Pisten Bully range of snow cats and ski piste grooming machines is manufactured by Kässbohrer in Germany. They have a driver and technician training academy which also includes online training courses for beginners and those interested in Pisten Bully at http://proacademy.info.
I have previously noted my interest in Kässbohrer and follow their products via their newsletter and using Giant’s Ski Region Simulator 2012 with its many user-created add-on “mods” which give a wide variety of Kässbohrer Pisten Bully snow groomers to try in the simulated ski resort setting. See https://blog.inf.ed.ac.uk/atate/2015/02/17/kassbohrer-pisten-bully-simulator/.
I signed up for their “PRO ACADEMY Online Training Demo English” to try out the online training courses, and after verification you can start the course.
Ski Resort Simulator 2012