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 tan (Army) or dark blue (Air Force) thread; and in "old gold" thread on blue slip-ons on both shoulders of other uniforms (Air Force only).
Forms of address
MWOs are generally initially addressed as "Master Warrant Officer Bloggins", or "Sergeant-Major Bloggins" (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: