Langton has over 30 years’ experience within the insurance industry and joins from Royal London’s intermediary division, where she held the position of chief executive.
Prior to this, she was group customer service director at Royal London and has also held senior roles within Scottish Life and Irish Life Assurance.
Langton replaces Andy Chapman and she will begin her new role in April 2021.
Chapman detailed his desire to retire in February 2020, however the coronavirus pandemic delayed finding a replacement, according to The Exeter.
Wallace Dobbin, chairman at The Exeter, said: “Isobel is a naturally inspirational and collaborative leader with deep knowledge and experience within our sector.
“We knew that we wanted someone who had experience of running a large business, but just as importantly was the right cultural fit.
“Isobel not only has a passion for delivering excellent customer service and is committed to the ideals of mutuality, but she is focused on developing high performing teams.”
Langton added: “The Exeter has an excellent track record and Andy has created a truly member-focused organisation with a highly engaged team.
“It was clear to me that this is an organisation with real purpose, something that is hugely important in current times.
“I am excited by the opportunities ahead and what we can achieve together.”