Commander
The "leader" of the Venatilin, who makes the decisions and practically controls the rest of the Venatilin.
Second in Command
The second in command, usually a relative of the commander, helps carry out the commanders orders.
Healer
There can be various healers at one time, all trained in how to heal not only Venatilin, but vampyres, fledglings and humans, as well.
Scouts
The scouts patrol the borders of Venatilin territory, and scout ahead whenever fighters are sent out on missions. Basically, they're the alarm system.
Fighters
The fighters are the ones that protect the rest of the Venatilin, as well as go on hunting missions and other such things.
"Elders"
The elders aren't specifically old, but that's the best word the Venatilin could come up with to refer to them by. Elders are the ones, typically females and younger children, that stay among the tree-houses the Venatilin live in, making clothing and weapons and other items.