Peter Lewis is to be the next chief executive of the Institute of Fundraising.
Lewis, who is chief executive of London Voluntary Service Council, will take up the role in October.
Lewis was a non-executive director of the London Marathon from 2004 to 2008. He has previously worked as business director at the Greater London Authority, executive director of the London Cycling Campaign and development manager at the homelessness charity Crisis. He started his career as a solicitor at the city law firm Allen & Overy.
In a statement, Lewis said: "Never has the role of fundraisers in bringing in every penny of extra cash been more important than at this time of public spending cuts and continued economic uncertainty."
He replaces Amanda McLean, who stood down from the role in March after only four months.
Mark Astarita, chair of the institute, said the organisation had "found someone who has a successful track record not only of leading membership-based charities, but also in senior roles in government and the private sector.
"Peter will be a great asset to our already strong team."