herder

noun
  1. A person who tends, drives, or manages livestock, especially on open land. noun
    The herder guided the sheep across the vast plains.
    As a herder, he spent most of his days in the fields with the cattle.
  2. A person who gathers or moves a group of people or things in a particular direction. noun
    The event coordinator acted as a herder, ensuring all the guests moved to the dining area.
    In the busy airport, the tour guide was a herder, keeping the group together.