New Zealand is a member of the UKUSA Agreement, (external link) a multilateral agreement for SIGINT cooperation. The four following agencies are also members:

This international alliance is also referred to as the ‘Five-Eyes’.

It is not possible for an organisation the size of the GCSB to collect foreign intelligence on all threats to New Zealand’s national security interests. However, through New Zealand’s long-standing partnerships, we can draw on greater support, technology and intelligence than would otherwise be available to us.