Shield
Argent, on a pale and a chief Teal, a gauntlet of the first grasping a key Celeste and a lightning bolt Tenn in saltire, both fimbriated of the first and a base embattled Gules edged of the first.
Crest
That for the regiments and separate battalions of the Texas Army National Guard: From a wreath Argent and Teal, a mullet of the first encircled by a garland of live oak and olive Proper.
Motto
EX MAGNO AD MAXIMUS (Great To Greatness).
Shield
The pale and chief form the letter T alluding to Texas and the units affiliation in the Texas Army National Guard. The gauntlet illustrates the 56th Brigade Combat Teams being armed and ready to perform the mission. The following images indicate the components that form the Brigade of the former Special Troops Battalion: the key denotes the safekeeping of Military Intelligence; the lightning bolt suggests the Signal capabilities; and the embattled base signifies the Engineer functions.
Crest
The crest is that of the Texas Army National Guard.
The coat of arms was originally approved for the Special Troops Battalion, 56th Brigade Combat Team, 36th Infantry Division on 26 June 2007. It was redesignated for the 156th Engineer Battalion with the symbolism updated effective 1 September 2014.