ShieldGules, on and in front of a rock issuant Argent an oak tree Vert.
CrestOn a wreath of the colors Argent and Gules an alerion Argent.
MottoNOUS SERVIRONS DE NOUVEAU (We Will Serve Again).
ShieldThe shield is red (Gules), with the rock in white (Argent), the colors of the Engineer Corps. The rock is taken from the arms of St. Mihiel and the tree is emblematic of the Meuse-Argonne.
CrestThe alerion represents service in the Lorraine Defensive during World War I.
The coat of arms was originally approved for the 23d Engineer Regiment on 5 April 1934. It was redesignated for the 23d Engineer Battalion (Armored) on 11 July 1941. It was redesignated for the 23d Armored Engineer Battalion on 23 December 1949. The insignia was redesignated for the 23d Engineer Battalion on 18 August 1958.