Innes joins from the Department for Business, Innovation and Skills with a remit to promote London to visitors, investors and students.
"An extraordinary city requires extraordinary leadership. In Gordon, London & Partners has found the skills to take London's stunning new brand to project our story around the world," said Mayor of London Boris Johnson.
"He joins at an amazing point in the capital's history. With the 2012 Games just over a year away we have this unique, once in a lifetime opportunity, to secure London as the best big city in the world for generations to come."
Innes previously held senior positions at the Foreign Office and UK Trade & Investment (UKTI). Prior to joining the public sector Innes was a solicitor, both in the City and overseas.
London & Partners was formed earlier this year to replace Visit London, Think London and Study London.
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