Lincolnshire County Council hopes to appoint a new chief executive in early May.
Current chief executive Tony McArdle will step down after more than 12 years in the role later this month.
The job paid more than £206,000 per year.
He will however continue work on some key projects while a new chief executive is appointed, before departing in the summer.
A search to find his successor will also begin later this month.
The council hopes his replacement will be appointed at a meeting of the Full Council on May 11, before fully taking over the reins in July.
Although there have rumours about some people planning on applying for the role, Lincolnshire County Council leader Martin Hill remained tight-lipped.
He said: “We hope that we have lots of strong candidates to come and lead this council from the officer point of view.
“I think we’ve got a good story to tell. We’re in a good place and hopefully we’ll get a lot of interest.”