A gold color metal and enamel device 1 3/16 inches (3.02 cm) in height overall consisting of a truck wheel with blue tire inscribed "MOBILE AGILE FLEXIBLE" in gold letters, the hub cap gold and bearing a brick red trident throughout; all surmounting in base three stylized brick red locomotive wheels with a gold horizontal rod.
The truck and locomotive wheels refer to the Battalion's basic mission of supply when it was the 150th Transportation Battalion. The locomotive wheels further allude to the unit's home area, the city of Meridian, which was founded at the junction of several railroad lines. The trident, adapted from the crest of the Mississippi Army National Guard, indicates the Battalion is a National Guard unit.
The distinctive unit insignia was originally approved for the 150th Transportation Battalion on 12 October 1967. It was redesignated for the 150th Quartermaster Battalion on 6 May 1982. The insignia was redesignated for the 150th Engineer Battalion with the description and symbolism revised effective 2 September 1994. It was cancelled effective 5 October 2016.