Former Worcestershire CC chief executive Rob Sykes has become lead intervention commissioner at Doncaster MBC.
He replaces Sir John Harman, former leader of Kirklees MC and former chair of the Environment Agency, who retired last week after 18 months in the job.
Mr Sykes joins as the council prepares for elections next month and for a referendum on whether to abandon the elected mayor system after the controversial tenures of incumbent Peter Davies (English Democrats) (pictured) and his predecessor Martin Winter (Lab).
Commissioners were appointed for three years by the Department for Communities and Local Government in 2010 after Doncaster suffered a series of governance disasters.
They are responsible for senior officer appointments, discipline and dismissals, and for any matter referred to them by statutory officers.
Rob Vincent was appointed chief executive when the commissioners took office and was succeeded in January by Jo Miller, who was previously deputy chief executive of the Local Government Association.
The other two commissioners are Jessica Crowe, executive director of the Centre for Public Scrutiny, and local business figure Julie Kenny.