The United Nations has today announced the appointment of MP David Shearer to head the organisation's mission in South Sudan.
The Labour MP for Mt Albert resigned as an MP to take up the role and gave his valedictory speech in Parliament last night.
Mr Shearer has worked extensively in the humanitarian sector, including in a number of roles with the United Nations.
His resignation will take effect from 31 December and he will take up the new position in the new year.
Mr Shearer's departure will force a by-election in the Mt Albert electorate.