A gold color metal and enamel device 1 3/16 inches (3.02 cm) in height overall consisting of a vertical rectangular shape with circular upper and lower ends, bearing on a white base a gold demi-sun with rays (of similar delineation as that on the Philippine flag) charged with a vertical scarlet arrowhead, issuing from a gold wall masoned of four rows, in center overall a narrow blue saltire, the side interstices all of scarlet above the third masoned row of the wall and each interstices bearing a white five-pointed star, all enclosed by a continuous scarlet scroll (folded back and slightly undulating inwardly at the sides) inscribed at the top "MONUMENTS" and in base "TO PROGRESS" all in gold letters.

The two stars and arrowhead symbolize the unit’s two battle honors in World War II, New Guinea (with arrowhead) and Southern Philippines.  The saltire was taken from Saint Andrew's cross raised in the sky during the first century as promise for triumph in battle and the blue color also alludes to the unit’s award of the Presidential Unit Citation (Army) for the Mindanao operation.  The masoned wall symbolizes the unit’s building capabilities, the strong and steadfast contributions of engineers, and the long history of the engineer corps

The distinctive unit insignia was originally approved for the 168th Engineer Group on 26 October 1970. It was redesignated for the 168th Engineer Brigade and amended to update the description and revise the symbolism on 13 May 2003. The symbolism was revised 6 October 2023.