The term 'One Who Knows the Drill' can be summarized by two job descriptions: Dentist and Sarge. A Dentist is a medical professional who specializes in oral health care, including diagnosing and treating diseases and conditions of the teeth, gums, and other parts of the mouth. A Sarge is a military rank, typically referring to a Sergeant, which is a non-commissioned officer in the armed forces who is responsible for leading and training a group of soldiers.