The GCSB's chief legal advisor Lisa Fong has been named the acting director of the spy agency.
Minister responsible for the GCSB, Chris Finlayson, made the announcement today and Ms Fong will take up the role from February 15.
She takes over from the current acting director Una Jagose who was earlier appointed Solicitor-General.
The State Services Commission says it is in the final stages of finding a permanent director for the spy agency.
Ms Fong held her current role since April 2013 and spent time as acting general counsel for the New Zealand Security Intelligence Service.
Before that, she spent eight years at Crown Law.