Gules, a bridge bent above a loop of rope both surmounted by a surveyor's transit on a tripod, a chief enhanced dovetailed all Argent and all within a border of the last.
That for the regiments and separate battalions of the Army Reserve: On a wreath of the colors Argent and Gules, the Lexington Minute Man Proper. The statue of the Minute Man, Captain John Parker (H.H. Kitson, sculptor), stands on the common in Lexington, Massachusetts.
FIGHT, BUILD, DEMOLISH.
The shield of the coat of arms of the former 336th General Service Regiment is used within a border to indicate the descent of the 330th Engineer Combat Battalion from the 2d Battalion of that organization. Scarlet and white are the colors of the Engineer Corps. The bridge, loop of rope and surveyor's transit are emblematic of the duties of the personnel who are specialists in construction.
The crest is that of the United States Army Reserve.
The coat of arms was originally approved for the 330th Engineer Combat Battalion on 8 April 1954. It was redesignated for the 330th Engineer Battalion on 9 May 1963.