Ms Lees is 46 years of age and has spent the last 26 years in local government.
Ms Lees is currently depute chief executive/executive director of corporate support with East Ayrshire Council. She brings to the position of chief executive a wealth of relevant experience which will allow the council to build on the solid foundation left by the previous incumbent, David Montgomery, who retired last month.
Ms Lees originally joined East Ayrshire Council as depute chief executive in 1995 (moving from Strathclyde RC) when local government was reorganised and East Ayrshire was formed from the former Kilmarnock and Loudoun DC, Cumnock and Doon Valley DC and Strathclyde RC.
East Ayrshire Council leader Drew McIntyre said: 'Replacing our previous chief executive was never going to be an easy task, and our selection process attracted a high calibre of applicants. I am delighted that we have now made our decision and I am sure that Fiona will build on the council's successes to date. Fiona can be assured of the full cooperation of everyone at East Ayrshire Council.'