John Dickie is set to join London First next week in the newly created role of director of strategy and policy.
A former deputy leader of Camden Council, Dickie joined the BBC in 2003 as head of political and parliamentary affairs.
Before joining the BBC, he spent two years as director of regulatory affairs at the European Competitive Telecommunications Association. He was also a lobbyist at the now defunct GPC agency.
London First chief executive Jo Valentine said: 'John has a keen ability to identify and drive forward distinctive policy positions that will further strengthen London First. Especially on critical issues such as airports and East End regeneration.'
London First represents over 300 of the capital's leading companies and its members represent 26 per cent of London's GDP.