A professional who observes patrons and employees participating in gambling activities to detect infractions of house rules. Respnsibilities include:

• Watches participants in games such as dice or cards to detect cheating, identify rule violators, and observe persons designated by superior.
• Speaks or signals to supervising personnel using hand, telephone, or voice to identify and supply information about suspected violators.
• May examine dice periodically to check for damage or substitution.
• May calculate winnings to verify payment made by dealer.