A Communications and Information Systems (CIS) Sailor is a highly trained command Telecommunications and Information Systems operator, who works in a dynamic and demanding, highly classified military environment. CIS sailors manage the flow of information into, out of, and around Navy units and establishments using leading edge technology.

CIS sailors:

• Operate selected Local Area Networks (LAN) and Information Systems at sea, including software applications;
• Prepare, handle and distribute messages around ships and shore establishments through the use of computer technology;
• Send and receive messages by radio telephone, radio, satellite, Morse flashing light, semaphore, flags and through the use of email;
• Operate radio and satellite equipment;
• Maintain security of special compartments, messages and other types of military material;
• Maintain communications compartments and specific equipment such as signal projectors, lights, flags, portable radios and selected IT equipment.

In addition to information flow responsibilities CIS sailors are integral members of the bridge and operations room teams, advising ships' commands of manoeuvring and warfare instructions. CIS sailors form part of boarding parties and may be required to conduct boarding operations form ships boats or helicopters.