Hans H Rissmann OBE is to step down as chief executive of the Edinburgh International Conference Centre in April 2015.
EICC chairman and Edinburgh city councillor, Gordon Munro said: "Finding a successor for Hans will take time and the position will undoubtedly attract international interest.
"As a city we owe Hans a great debt having entered the international congress marketplace with an iconic purpose-built facility under his stewardship."
Edinburgh City Council chief executive Sue Bruce said: "He has made a huge personal contribution through his exemplary leadership. In that time the conference centre has hosted close to one million delegates and delivered an economic impact in excess of £400 million to the city. EICC played a leading role in attracting major businesses to collocate and contribute to the regeneration of an important part of the city centre."
An EICC spokesman said: "Continuity is key for our international customers."
German-born Mr Rissmann was EICC's first and only chief executive since joining the company in 1993.