 He studied Egyptology, Assyriology, and ancient Near Eastern Archeology at Hamburg University and the Free University of Berlin.In 1988 Dreyer and his colleague Werner Kaiser excavated in Abydos (Umm el-Qaab) on the cemetery "U" the burial site of the king (U-j), which is dated to the Naquada period IIIa2, known as king Scorpion I.Currently, this is the earliest known large royal tomb of old Egypt.