ATOs are generally selected as Captains, exclusively from within the Royal Logistic Corps; however when an Ammunition Technician (AT) Warrant Officer (WO) or Senior Non-Commissioned Officer (SNCO) is selected for commission, their AT qualification transfers to that of an ATO. One such example is Major P Norton GC. In 11 EOD Regiment, in addition to the Troop Commander's role, the ATO performs Counter-Terrorist bomb disposal activities and IEDD within the UK and Northern Ireland, leading an EOD team. WO and SNCO ATs may also lead EOD teams, and when doing so are often referred to as the ATO.