A sniper is an infantry soldier or other serviceman (e.g. police officer) who specializes in shooting from a concealed position over longer ranges than regular infantry, often with a specially designed or adapted sniper rifle. A sniper requires skill in marksmanship, camouflage, and field craft.

There is no hunting like the hunting of man, and those who have hunted armed men long enough and liked it, never care for anything else thereafter.
--Ernest Hemingway