The management consultant Elizabeth Balgobin has been appointed interim chief executive of the Small Charities Coalition.
She will replace Angela Style, whose six-month contract as interim chief executive has ended.
A spokeswoman for the SCC said Balgobin had been appointed for a "short period" and would be supporting the organisation’s board to recruit a permanent chief executive.
An advert for the permanent role is expected to be published in the next week or two, the spokeswoman said.
Balgobin has 30 years’ experience working in the charity sector and since 2008 has served as interim head of seven different charities. Before that she was chief executive of London Voluntary Service Council, which has since closed.
The SCC spokeswoman said: "The chair, Julia Kaufmann, and board are sorry to see Angela leave and thank her for her exceptional work leading the organisation over the past six months."
Style took over leadership of the umbrella body for small charities after the departure of the previous chief executive, Mandy Johnson, in September.
It is understood that there were tensions between Johnson and the SCC's board after she took part in a Third Sector article and photoshoot celebrating the number of women leading charity sector representative bodies, but then tweeted that she regretted taking part after some in the sector criticised the piece for its lack of diversity. Johnson also asked for her contribution and photo to be removed from the feature.