You're best bet is to find a tankebase, that's where most fire pilots congregate.
I know there's one in Jeffco most or off contract now but the Mgr would be able to tell you who the company is, when in doubt you can usually find your local Forests number in the Gov section of the phone book. Start with the Forest Aviation Officer or Helitack foreman /superintendent.
Most of it will be leg work and phone calls and nowadays more butts than seats however rarely does a year go by without a fire.
Good luck