Distinctive Unit Insignia. Description: A Silver color metal and enamel device 1 1/8 inches (2.86 cm) in height overall consisting of a shield blazoned: Per fess Gules and Argent an arrow palewise barbed with a fleur-de-lis between four fleurs-de-lis all counterchanged. Attached below the shield a Silver scroll inscribed "PROVEN PIONEERS" in Red letters.
         Symbolism: Scarlet and white (silver) are the colors used for the Corps of Engineers. The arrow barbed with a fleur-de-lis symbolizes the unit's participation in the assault landing on Normandy. The organization's other four campaigns in Europe during World War II are represented by the four fleurs-de-lis.
         Background: The distinctive unit insignia was approved on 27 June 1955.

Coat of Arms.
         Blazon:
                 Shield: Per fess Gules and Argent an arrow palewise barbed with a fleur-de-lis between four fleurs-de-lis all counterchanged.
                 Crest: On a wreath of the colors Argent and Gules a mound Vert and thereon two swords saltirewise Silver, hilts Or, enfiled by a castle turret of five embattlements of the first masoned Azure and bearing palewise the head of an oriental pole arm (Bishamon Yari) of the second.
                 Motto: PROVEN PIONEERS.
         Symbolism:
                 Shield: Scarlet and white (silver) are the colors used for the Corps of Engineers. The arrow barbed with a fleur-de-lis symbolizes the unit's participation in the assault landing on Normandy. The organization's other four campaigns in Europe during World War II are represented by the four fleurs-de-lis.
                 Crest: The swords and castle turret connote combat engineers. They also allude to Europe where the unit participated in five campaigns, denoted by the number of embattlements; the blue throughout the turret indicates the Presidential Unit Citation awarded the organization for the Normandy Campaign during World War II. The pole arm refers to Asia and the colors red, gold and green indicate service in South Vietnam where the unit participated in fourteen campaigns, and received three decorations. The colors red, white and blue denote the Valorous Unit Award for DAK TO--BEN HET, and red and green refer to the award of the Vietnamese Civil Action Honor Medal, First Class.
        Background: The coat of arms was approved on 27 June 1955. It was amended to add a crest on 9 September 1977.