A gold color metal and enamel device 1 1/8 (2.86cm) inches in height overall consisting of a modified white keystone bearing throughout a vertical blue bar concave on each side charged with a white fleur-de-lis within; overall, a gold wreath, enclosing all, at the top a gold castle wall with three projections, and a red scroll inscribed at the sides and base "BUILD TO SERVE" in gold letters.
Scarlet and white are the colors for the Corps of Engineers. The fleur-de-lis within the laurel wreath refers to the historic World War II action for which the organization was awarded the Meritorious Unit Commendation, European Theater; and the embattled castle wall connotes the construction responsibilities of the Engineers.
The distinctive unit insignia was approved on 1 May 1975.