Dwayne Johnson will take the reins at the council from Margaret Carney, who retires at the end of next month.
Johnson, who is currently director of social care and health at Sefton in a role he has held since 2014, will replace Carney when she retires on 31 May after 10 years at the helm.
A qualified social worker, Johnson has previously worked for Halton Council as a strategic director covering social care, housing, waste, libraries, and community safety, before joining Sefton Council around five years ago.
His appointment as chief executive was approved at a full council meeting last night.
Johnson said: “I’m very proud and honoured to be appointed to the position of Chief Executive in Sefton. Having worked here for the last five years, I can see how much Sefton has to offer in supporting existing and attracting new businesses into our area, how engaged our communities are in what we are trying to deliver, and we have such a talented workforce to match.
“I am really looking forward to working with the leader and elected members on delivering the vision of this wonderful borough and so looking forward to starting the role in June.”