pit boss

/P IH1 T B AA0 S/
noun
  1. 1

    A direct overseer of laborers in a mining operation.

  2. 2

    A supervisor who oversees the dealers and activity at the gaming tables in a casino, and who typically has the authority to expel unruly gamblers from the premises.

  3. 3

    The supervisor of the maintenance pit crew of a driver.

Source: https://en.wiktionary.org/wiki/pit%20boss