Fire officers plan, organise, direct and co-ordinate the activities and resources of a specific physical or functional area of a statutory or private fire brigade/service and the resources necessary for the protection of property at fires within a salvage corps area. Ambulance officers plan, organise, direct and co-ordinate the resources necessary for the provision of ambulance services. Prison officers (principal officer and above) plan, organise, direct, and co-ordinate the activities and resources necessary for the running of a prison, remand or detention centre. Customs officers plan and direct the work of customs, excise and immigration staff in the monitoring and inspection of goods and persons crossing national borders.
The position of senior fire officer is achieved by internal promotion. Entry to senior positions within the prison service and revenue and customs is either by internal promotion or by open competition; both organisations operate accelerated promotion schemes available to internal and external applicants. Entry to the prison service is subject to age restrictions, and both the prison service and revenue and customs impose nationality conditions. Entry to senior positions within the ambulance service is largely by internal promotion from supervisory roles.