Mr Wall rejoined The EDI Group in 1996, eight years after he helped to establish it for The City of Edinburgh Council, and created its first major project, Edinburgh Park. The company celebrates its 20th anniversary this year.
EDI has been variety of projects over recent years including Technology Transfer centre at Edinburgh University’s King’s Buildings, the redevelopment of Wester Hailes town centre, the Gyle Shopping centre and the regeneration of Craigmillar
Mr Wall said: “I am very proud of the track record of EDI over the last two decades and the contribution we have been able to make to the changing face of the city through our developments.”
Councillor Gordon MacKenzie, chair of the EDI Group, said: "Ian began work in the field 20 years ago when he first joined the city’s economic development and planning department. Since then he’s played a major part in the regeneration of the city.”
John Mark Di Ciacca, director of property, has agreed to be acting chief executive while the Board seeks a successor.