SSE (Short Service Employee) Hard Hat Sticker ( Yellow on Green )SSE Hard Hat Sticker The color combination of this SSE Sticker is Yellow SSE text with a Green Background and does not have the Short Service Employee text, only reads SSE Short Service Employee (SSE) Hard Hat Stickers are used as a unique identifier so other personnel can easily identify someone who has less than 6 Months on the Job. SSE Stickers for new personnel applies to employees or subcontractors who have less than six months experience in the