The Communications and Information Services (CIS) Corps is responsible for the provision and maintenance of effective communications and information systems for Óglaigh na hÉireann.
CIS Corps personnel are trained and educated for their respective roles through a variety of methods, including Óglaigh na hÉireann Trainee Technician Scheme (TTS), which is effectively a four-year accredited scheme, and accepts applications from across the three services of Óglaigh na hÉireann. The Military Authorities have confirmed that they have recieved applications from personnel to join the CIS Corps in the usual manner through their Units and in line with applications for other specialist areas in the Defence Forces.
The CIS Corps also ensures the conduct of third level education schemes and professional military education courses up to and including Level 9 Masters Degrees.
The Strength of Permanent Defence Force CIS Corps is not released for operational and security reasons.