ShieldOr, on a fess abased Gules (Crimson) over a pale of the like a spanner fesswise of the first.
CrestThat for the regiments and separate battalions of the California Army National Guard: From a wreath Or and Gules (Crimson), the setting sun behind a grizzly bear passant on a grassy field, all Proper.
MottoQUITAR FIJAR Y REPONER (Remove, Repair, Replace).
ShieldCrimson and yellow are the colors used for Ordnance, the original designation of the unit. The intersecting bands refer to Alameda, the Spanish word for public walk, and denote the Battalion's home area. The spanner, a tool used for adjusting a wheel-lock musket, represents Ordnance.
CrestThe crest is that of the California Army National Guard.
The coat of arms was originally approved for the 749th Ordnance Battalion on 14 August 1957. It was cancelled on 26 June 1968. The insignia was reinstated and redesignated for the 749th Maintenance Battalion on 10 January 1997. It was redesignated effective 1 September 2007, for the 749th Support Battalion with the symbolism updated.