Hey Ghost
I'm not sure trying to speak to an ATCO while on position is the best idea
They might not be at their most polite.
My best suggestion to you is to try and get hold of the guys at the head office in charge of recruiting. Give them a call. You should be able to get that number relatively easily. Failing that, post on this thread the areas you're thinking of. Maybe a current ATCO will send you a PM or something to help put you in the right direction...