On a horizontal rectangle edged with a 1/8 inch (.32 cm) gray border and divided diagonally from upper left to lower right, dark blue over maroon, a white stone head war club pendant with two feathers. Attached above the rectangle a white scroll inscribed "SHIKELLAMY" in dark blue letters. Attached below the rectangle a white scroll inscribed "HIGH SCHOOL" in dark blue letters. The overall dimensions are 3 1/2 inches (8.89 cm) in height by 3 inches (7.62 cm) in width.
Dark blue, maroon and white are the school colors. The war club reflects the school mascot, the Native American Chief Shikellamy for whom the school is named and also reflects the cadets' "fighting" spirit.
The shoulder sleeve insignia was approved on 29 July 1996.