Foremen of Signals are the most highly qualified non-commissioned signal equipment managers and Incorporated Engineers in the Royal Corps of Signals. A soldier selected for Foreman of Signals training, who must hold a minimum rank of sergeant, undertakes a BSc at Cranfield University. On appointment, the soldier is promoted to Staff Sergeant if the rank is not already held, and assumes the appointment of Foreman of Signals. The holder of the appointment can be promoted through the ranks from Staff Sergeant, to Warrant officer Class two, then Warrant officer Class one. To distinguish the appointment the Suffix of FofS is used, ie SSgt (FofS), WO2(FofS) etc. The title has definitely existed since the formation of the Royal Corps of Signals and may have been used previously in the Royal Engineers Signal Service .