A former Newman government minister will be among three new Brisbane councillors to be sworn in within the next few weeks, as several LNP councillors prepare to depart City Hall.

Former child safety minister Tracy Davis has received the LNP endorsement to replace outgoing McDowall Ward councillor Norm Wyndham when he retires next month.

Ms Davis said it was an exciting time to start work as a councillor, following the appointment of Adrian Schrinner as mayor.