Tom Sheridan, chief executive and one of the seven founders of discretionary fund manager and platform Seven Investment Management, is to retire.
Mr Sheridan has been chief executive of the firm since its launch 18 years ago, and prior to that worked at Barclays Stockbrokers as did many of the founders of the firm.
At Barclays he held the title of managing director, and prior to that spent 20 years at Prudential Securities.
Mr Sheridan said: "7IM has been a great experience and I am proud to be leaving the business at this time with a great range of clients and the strongest management team it has ever had.
"Over the years it has been my pleasure and privilege to work with many of the leading UK advisory firms. I have seen many of these firms go from strength to strength and hope that 7IM will be able to continue supporting their growth."
Mr Sheridan, who will continue to work with 7IM in an advisory role, will be replaced by Dean Proctor.
Mr Proctor was until recently managing director of the Unsecured Lending business at Barclays, and prior to that worked at Arbuthnot Latham and Citi bank.
He said: "I am excited to be joining 7IM at this stage of its evolution. The business truly has a track record of innovation from being early into multi-manager and platforms, the launch of its ground breaking AAP fund range in 2008, its award winning app 7IMagine, and most recently the launch of the 7IM Retirement Income Service.
"One of my key focusses will be building on this legacy of innovation as well as getting to know our advisory partners."