A gold color metal and enamel device 1 1/8 inches (2.86cm) in height consisting of a white enamel square with upper sides outlined by the blades of two gold bayonets crossed near their points, the lower sides formed by a scarlet scroll curved at center and bearing the motto "NO TASK TOO LARGE" in gold letters, the scroll ends passing behind the bayonet handles and curving against the blades; traversing the white area just above the center two blue wavy bars crossed at center by a vertical gold pick its handle between the bayonet points and its head in base and superimposed upon the pick handle a scarlet cord attached to a scarlet plumb bob its point in base touching upon the center of the scroll.
White and scarlet are the colors used by the Corps of Engineers. The crossed bayonets suggest the unit's combat capability while the pick and plumb bob are tools relative to the basic engineering mission of the Brigade. The wavy bars refer to the Missouri and Mississippi Rivers upon which the Brigade's two home stations (Jefferson City and St. Louis) are located. The Aleutian Islands, where the unit campaigned during World War II, are indicated by the initial "A" formed by the position of the bayonets and horizontal blue bars. The white area within relates to the mountainous terrain and cold and foggy climate of the Aleutians.
The distinctive unit insignia was approved on 7 Oct 1970.