duty-man

Noun

dutyman (plural dutymen)

1. (UK) A fully trained soldier who has a specific role.
   • The recruit eventually graduates to become a trained soldier and dutyman, with his place in a troop.1985, Donald John Smith, Horses at Work, page 30
2. (UK, military or quasi-military organizations such as police or fire departments) A man who is on duty in a particular setting.
   • Some stations were connected directly to the automatic fire alarms of important premises and to call boxes in the street which all had to be tested. So the role of dutyman was complicated and as he had to stay awake all night, this was called a wakeful watch.2006, Ray Chilton, Underfire: The Dramatic Life of a London Fireman, →ISBN, page 18