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 chevron inverted Gules and Argent, a chevron in similar position per chevron of the like counterchanged, in chief a mullet of the second, in base four pallets of the first. Attached below the shield a Silver scroll inscribed "HAEC LUCRA LABORUM" in Black letters.
         Symbolism: Scarlet and white are the colors traditionally associated with the Corps of Engineers. The pallets represent strength and fortitude. The inverted chevron symbolizes protection and the star indicates the parent organization was activated in the State of Texas.
         Background: The distinctive unit insignia was originally approved for the 354th Engineer General Service Regiment on 23 February 1943. It was redesignated for the 554th Engineer Battalion (Construction) on 9 September 1955. It was amended to change the description (blazon) of the shield on 1 June 1966. The insignia for the 554th Engineer Battalion was amended to revise the description and symbolism of the design on 17 June 1991.

Coat of Arms.
         Blazon:
                 Shield: Per chevron inverted Gules and Argent, a chevron in similar position per chevron of the like counterchanged, in chief a mullet of the second, in base four pallets of the first.
                 Crest: On a wreath of the colors, Argent and Gules, a laurel wreath Vert surmounted by a pair of swords in saltire points up Proper, debruised by a dragon's face Gules armed Argent, eyes Or, jessant-de-lis of the last.
                 Motto: HAEC LUCRA LABORUM (These are the Profits of Industry).
         Symbolism:
                 Shield: Scarlet and white are the colors traditionally associated with the Corps of Engineers. The pallets represent strength and fortitude. The inverted chevron symbolizes protection and the star indicates the parent organization was activated in the State of Texas.
                 Crest: The Battalion's campaigns in Vietnam are represented by the dragon's face, jessant-de-lis to honor the Battalion's World War II campaigns in Northern France and other European theaters. The swords represent each of these conflicts and are placed saltirewise, denoting conflict with honor. The many decorations and honors distinguishing the unit's service are symbolized by the wreath of laurel. Red denotes courage and gold is representative of excellence.
         Background: The coat of arms was originally approved for the 354th Engineer General Service Regiment on 23 February 1943. It was redesignated for the 554th Engineer Battalion (Construction) on 9 September 1955. It was amended to change the description (blazon) of the shield on 1 June 1966. The coat of arms for the 554th Engineer Battalion was amended to include a crest and revise the symbolism on 17 June 1991.