artillery, engineer, and signal regiments, and infantry and service battalions. This appointment is normally held by a chief warrant officer.

Within sub-units (such as squadrons, companies and artillery batteries) the sub-unit sergeant-major generally holds the rank of master warrant officer and is known as a squadron, company or, battery sergeant major. They are addressed as "Sergeant-Major" (i.e. "SSM", "CSM", "BSM", etc.), "Mr", or "Ms" by officers and "Sir" or "Ma'am" by subordinates