The GCSB's to get a new temporary director as its former boss heads to a new role.

The GCSB's chief legal advisor, Lisa Fong, has been appointed Acting Director of the intelligence agency by GCSB Minister Chris Finlayson.

Ms Fong will take up the position from February 15th and will fill the spot left by her predecessor, Una Jagose, who's been appointed as the new Solicitor General.

Mr Finlayson said the recruitment process to find a new GCSB director is in its final stages.