Master warrant officer

The rank insignia of the MWO is a crown within a wreath of gold laurel, worn on both forearms of the service dress tunic; in gold metal and green enamel miniature pins on the collar of the service dress shirt and outerwear coats (army only); on CADPAT slipons worn in the middle of the chest, embroidered in high vis thread (army) or dark blue (air force) thread; and in "pearl grey" thread on blue slip-ons on both shoulders of other uniforms (air force only).

MWOs are generally initially addressed as "Master Warrant Officer", or "Sergeant-Major" (if they hold that appointment), and thereafter as "Sir" or "Ma'am".

MWOs may hold a number of appointments, including the position of sergeant-major, the most senior NCM in a company-sized Army unit or sub-unit.

Some of these appointments are listed below: Due to the unified nature of the CF, it is not unheard-of for Air Force MWOs — especially those of the so-called "purple trades", such as logistics or military police — to find themselves filling the appointment of squadron or company sergeant-major in what are otherwise considered "hard" army units (such as service battalions or communication squadrons).

[1] Master warrant officers often hold senior leadership roles such as school sergeant majors and regimental sergeant majors of brigade-sized units.