Alkonium

I know it doesn't make sense that they would throw a Sith off the ruling seat when they're based off of a group that served a Sith, but that's where things get tricky; they are after all a self-contained group (similar to your Echelon 5), they have their own beliefs, philosophies, classes, ranks, and Masters/Rulers, they are much like the Sith or Jedi, an individual self-governing body/organization within an organization (that organization being the Galactic Empire). Much like an individual entity, their rules and rulers can change (though not as easily as the Sith mind you) and that's where Vector was meant to come into play if the 'Nex Venators' had been established in the previous two RP's, but that's an explanation for another time.

....Okay, so they're more thought out than you might've guessed, but they still don't have much of a place/foothold in the RP, so that makes things difficult *shrugs* , but whatever, I'm open to suggestions.