Philip Hollister is retiring from JF Finnegan after 50 years with the Sheffield building group.
Mr Hollister joined the Ecclesall Road firm from school in 1963, working his way up to commercial director before taking over from Philip Ryan as chairman in 2010.
He leaves at the end of the month, after a year during which the group boosted turnover by 35 per cent to £34.2 million and completed a series of major projects.
During his time with Finnegan, Mr Hollister was involved in a number of landmark projects, including Sheffield Parkway Business Park, Butcher Works, the award-winning Charles St Q-Park ‘Cheesegrater’ and the innovative, highly sustainable Sheffield City College.
Mr Hollister said he was proud of everything the firm had achieved.