GCSB is a public service department with its head office in Wellington and a regional office in Auckland.

GCSB has two communications interception stations: a high frequency radio interception and direction-finding station at Tangimoana, near Palmerston North, and a satellite communications interception station at Waihopai, near Blenheim.

The National Cyber Security Centre (external link) (NCSC) has been located within the GCSB since 2011. The NCSC provides enhanced services and advice to government agencies and critical infrastructure providers to assist them to defend against cyber-borne threats.

Andrew Hampton has been Director-General of the Government Communications Security Bureau since the April 2016. The Director-General is supported by an internal Senior Leadership Team and reports directly to the Minister responsible for the GCSB, the Hon Andrew Little.

GCSB employ staff in a wide range of disciplines, including foreign language experts, communications and cryptography specialists, engineers, technicians, legal, policy and support staff.