Labour leader Andrew Little has appointed left wing strategist Matt McCarten as his chief of staff.
Mr McCarten was chief of staff for former leader David Cunliffe and was kept on in a temporary basis after Mr Little won the leadership a month ago.
Mr McCarten's appointment in February stunned the Labour caucus because as a founder of the break-away Alliance, he had spent years opposing Labour.
But he has earned the trust of MPs and staff with his strategic skills and people management skills.
Mr Little has been reviewing the leaders' office. Yesterday he confirmed Mr McCarten's appointment and all other staff will be kept on.