Shield
Gules on an augmented pale Argent an anchor debruised by two oars in saltire Sable.
Crest
On a wreath of the colors (Argent and Gules) a five bastioned fort Gules fimbriated Argent.
Motto
ARDEUR ET TENACITE (Eagerness and Tenacity).
This unit dates from August 1861 when Companies "C" and "D," Battalion of Engineers, were organized. These companies took part in the operations of the Army of the Potomac, the anchor and crossed oars being the badge of the Engineers and Pontoniers of that Army. They also participated in the Spanish War in Cuba, shown by the badge of the Fifth Corps, a five-bastioned fort, and were in the Lake Lanao Moro campaign in the Philippines. In 1901, Companies "C" and "D" were enlarged to four companies and called the Second Battalion of Engineers and in 1916, the battalion was further expanded into the 2nd Regiment of Engineers, which took part in World War I as a member of the Second Division. The regiment was decorated by the French with the fourragere for distinguished services rendered (a) during the offensive south of Soissons, July 18th and (b) during the operations of October 2-8 at Blanc Mont and Medead Farm in the Champagne. The motto is taken verbatim from the second citation of the regiment by the French during World War I for services rendered in the operations of October 2-8, 1918, at Blanc Mont and Medead Farm in the Champagne.
The coat of arms was originally approved for the 2nd Engineer Regiment on 7 June 1924. It was redesignated for the 2nd Engineer Battalion (Combat) on 26 February 1940. It was redesignated for the 2nd Engineer Combat Battalion on 8 January 1954. The insignia was redesignated for the 2nd Engineer Battalion on 15 July 1958.