David Preece is to retire from his position of executive director of the Mortgage Advice Bureau in July.
Having spent 15 years in the role Mr Preece will become a non-executive director and continue to provide consultancy services to the MAB.
Mr Preece's career spanned 41 years in financial services. He became part time in his role at the MAB two years ago, delegating some of his operational responsibilities to other members of the senior management team.
He remains a significant shareholder of the group with a 2.98 per cent shareholding.
MAB chief executive officer Peter Brodnicki said: "I would like to thank David very much for his long standing commitment to MAB, he has been an extraordinary COO, board director, mentor, and friend.
"David has helped us navigate challenges with confidence and certainty, but as importantly to be pioneering, which is fundamental to MAB's DNA.
"His lifetime achievement award at The British Mortgage Awards in 2017 demonstrates exactly how highly thought of David is, not just at MAB, but also by many across our industry."
Chairman Katherine Innes Ker added: "I have long valued David's wise counsel, deep insights, judgement, and thoughtfulness, combined with his warm sense of humour.
"His commitment to MAB is evident, and I am delighted that he will remain on the board as a non-executive Director upon his retirement."
The Mortgage Advice Bureau has more than 1,000 advisers working at the business.