Army Corps - Communication & Information Services
Formerly the Army Corps of signals, this corps is responsible for providing all communication and information technology services to the Defence Forces.
This role includes the development and maintenance of a countrywide private Defence Forces Telecommunications Network (DFTN), which can support both voice and data services, and the provision, and maintenance of military radio equipment for use by Defence Forces personnel at home and abroad. The DFTN provides advanced telecommunications services including desk to desk dialing and networked IT services such as Email, Internet and Intranet access, as well as fax and paging services.
The CIS Corps also provides communication links to all Overseas Operations including a satellite link from the DFTN to Irish troops in Liberia.
The Field CIS company
The field communication and information services company consists of a radio platoon, a network systems platoon and maintenance platoon. The company provides communications between brigade command and control installations and the headquarters of the each unit within the brigade. In addition, the company provides communications and computer repair facilities.
CIS Company, Defence Forces Headquarters
1 Field CIS Company, Collins Barracks, Cork
2 Field CIS Company, McKee Barracks, Dublin 
4 Field CIS Company, Custume Barracks, Mullingar.