I once took a 3-day course from Paul Venner. He is the only CSIA Level 4 and CSCF Level 4 at Whistler.
Unofficially I was told, you can get CSIA Level 4 and up to CSCF Level 3 by taking examines. For CSCF Level 4, it's rewarded to a person who coached a skier who got a medal at Olympic.