Description
A cinquefoil 2 1/2 inches (6.35cm) in diameter overall with one lobe at top center, having a 1/8 inch (.32cm) yellow border and divided horizontally into two sections by a yellow S-shape line with red above and blue below.

Symbolism
The five-lobed form is an allusion to the Rose of Sharon, national flower of the Republic of South Korea, where the organization has served continuously since activation. The colors red and blue, separated by the S-shaped line, are references to the yin yang symbol found on the South Korean flag. The unit’s branch and numerical designation are further suggested by the S-shape, S being the 19th letter of the alphabet and initial letter of the word “Support.”

Background
The shoulder sleeve insignia was originally approved for the 19th Support Brigade on 21 August 1975. It was redesignated for the 19th Support Command on 14 April 1978 and amended to revise the symbolism. The insignia was redesignated with description updated for the 19th Sustainment Command on 1 June 2006.