Regimental Sergeant Major of the Army (RSM-A) is the most senior Warrant Officer in the Australian Army. It is a singular appointment – it is only held by one person at any time. RSM-A holds the unique rank of Warrant Officer (WO) which is senior to Warrant Officer Class One. The special insignia for the RSM-A is the Australian coat of arms with a wreath around it. The eleventh and current Regimental Sergeant Major of the Army is Grant MacFarlane.