Peterborough City Council’s Chief Executive will also be taking up the same role at Cambridgeshire County Council from today.
Gillian Beasley will be in charge of both local authorities.
This is the first shared chief executive role between unitary and county authorities nationally and will be in place for an initial period of 12 months.
The appointment follows the resignation of Cambridgeshire County Council s chief executive, Mark Lloyd. Mr Lloyd is taking up the position of chief executive for the Local Government Association.