Robert Mianich

City of Perth chief executive Martin Mileham has taken indefinite leave, with Lord Mayor Lisa Scaffidi explaining today that his move comes after a private investigation by law firm Herbert Smith Freehills late last year.

The City of Perth will seek to appoint a new acting chief executive at a special meeting tonight after Robert Mianich went on personal leave yesterday, just days after being appointed to the role.

UPDATED: Former City of Perth chief executive Martin Mileham says he is considering legal action after being sacked suddenly by the commissioners running the council yesterday.

Michelle Reynolds has quietly lay the groundwork for a more accountable city ahead of this Saturday's lord mayoral and council election.