Shield
Gules, on a fess wavy Argent between in chief a pile Or charged with a cross pate of the first and in base a gauntlet, palm inward, of the second holding a demi-spear Sable, edged and garnished of the second, the spearhead Argent (Silver Gray), point upward and a key, of the fourth, ward downward, edged of the second in saltire, a bar wavy Azure.
Crest
From a wreath Argent and Gules, a sea lion rampant Or, eyed, langued and clawed of the second collared Azure charged with two escallop shells of the first.
Motto
AMERICAS SUSTENTANS (Supporting the Americas).
Shield
The wavys, a heraldic symbol for travel, suggests the Battalion's capability to deploy to any contingency operation, in a timely manner. The pile alludes to the unit's military support in humanitarian assistance/disaster relief. The red cross from the sails of the Spanish galleon symbolizes the rich Spanish history of the United States Army South's area of operation. The gauntlet represents strength and readiness of the Special Troops Battalion. The demi-spear signifies the reach of the Battalion's ability in sustaining the fight against the Regional War on Terror, while increasing security and coalition cooperation. The key denotes logistical responsibility of the coalition mission.
Crest
The sea lion, taken from the coat of arms of the Philippine Islands, represents the decoration awarded for wartime service in the Philippines during World War II. The collar on the sea lion alludes to the control rendered during military operation. The escallop shells denote travelling to far places, alluding to the unit's campaign credits during World War II.
The coat of arms was approved effective 16 July 2008. It was amended to correct the description and symbolism on 28 July 2009.