Former federal MP and Sydney City Councillor Kerryn Phelps has launched a bid to oust long-time political rival Clover Moore as the city's Lord Mayor.
Dr Phelps will run against Ms Moore - who has held the position of Lord Mayor for 17 years - in the election of be held on September 4.
As the first female Australian Medical Association president, former federal member for Wentworth, marriage equality advocate and key architect of the medevac laws, Dr Phelps is no stranger to campaigning.
Still, she expects it will be a tough fight.
"It's time for change," she told AAP.
"The City of Sydney is the best city in the world, but we're not performing at our best."
Streamlining approvals for small businesses, increasing community consultation and setting reasonable infrastructure targets are among the policies she would change.
"Sydney deserves a Lord Mayor who really listens to the community and truly understands the problems people face and who has the determination, the courage and the strength to face the challenging times ahead and to restore the city we love."
Dr Phelps was elected to the Sydney City Council on Ms Moore's ticket in 2016, taking up the position of Deputy Mayor.
She sensationally quit the post within a year, but remained a councillor.
"I was actually quite shocked at how hostile the working environment was when I started, because I am a naturally optimistic and enthusiastic, positive person."
"I put up with it for a number of months but when it got to a point where it was clear that things were not going to improve, I decided to stay on council but to stay on as a true independent."
But her decision to run against Ms Moore isn't personal, she says.
"An element of good governance is to make sure that there is regular change at the top," Dr Phelps said.
"We've had the same leadership for almost 17 years, and it has grown stale."