The word of the day from The Zombie Cause Dictionary is NECROMANCER.
NECROMANCER (aka Necromantician). One who creates (zombie primes) and purportedly controls zombies. (They certainly create zombies, but there is no evidence that they control them once they are released into society). Necromancers feed on and distribute flesh, but can only take flesh provided by zombies (Tollants or Putriphiles). The Covenant protects Necromancers from attacks by zombie hunters. Even though Necromancers repeatedly violate The Covenant, zombie hunters have never actually broken The Covenant. Exile is currently the only way to stop a Necromancer from producing zombies.