On a gold color metal and enamel device 1 1/4 inches (3.18 cm) in width overall the top curving and forming an apex, a horizontal unsheathed gold sword, point to left and surmounting a light blue five pointed star, supported by two green branches of mountain ash, the ends crossed in base all above a gold scroll bearing the motto "SUPPORTING THE SWORD" in black letters.
The sword, a symbol of the combat arm, supported by the branches of the mountain ash, commonly known as the service tree, alludes to the support element of the organization and symbolizes the myriad activities within the support organization. The star refers to supply activities.
The distinctive unit insignia was originally approved for the 548th Supply and Service Battalion on 7 July 1967. It was redesignated for the 548th Support Battalion with the description and symbolism revised effective 16 November 1993.