The co-founder of builders merchant MKM Building Supplies is to become executive chairman of the business.
David Kilburn will be succeeded in the role of chief executive at the Hull-based company, which has a warehouse in Seamer Road, by David Moore.
Mr Moore spent 14 years as chief executive of conservatory roof business Ultraframe. More recently he took over at conservatory firm Amdega after it was bought by turnaround private equity firm Endless but was unable to prevent its collapse.
Mr Kilburn will remain closely involved in the day-to-day running of the business he set up 17 years ago with Peter Murray.
MKM Building Supplies recorded turnover of £133 million.