Rebecca White's chief of staff Michael Stedman will leave the job after seven years in the position.
Mr Stedman, formerly a journalist for The Examiner and The Mercury newspapers, joined the government media unit in 2011 where he worked as an adviser to former premier Lara Giddings.
After Labor's election loss in 2014, he was appointed chief of staff to Brian Green and later Ms White.
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Ms White said Mr Stedman had made a big contribution to the Labor Party and development of good public policy.
"While politicians sometimes get noted for the time they spend away from their families, it is true also for staff and I want to thank Michael's family for their understanding," she said.
Mr Stedman will be replaced by Mel James who is currently ACT Labor's state secretary.
A former Tasmanian, Ms James has been a chief of staff to a Labor minister and adviser to senior parliamentary party members.
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