Stephen Bubb, chief executive of Acevo, has urged the Chancellor, Alistair Darling, to let voluntary organisations play a wider role in five key areas of public services.
The meeting was arranged after the chief executives body drafted a letter, signed by more than 250 charity chief executives, that was sent to Darling in December requesting a summit on how charities and the Government could work more closely on reforming public services.
Bubb identified treating long-term health conditions, reducing reoffending, addiction, services for the long-term unemployed and social care and support for the elderly as the five areas suitable for greater charity involvement.
Helen Bailey, director of public services at the Treasury, has agreed to a follow-up meeting with Bubb to discuss what can be done to increase the sector's level of delivery in these areas.
"We need to move this from political discussion to working with officials on how to do this," said Bubb.
Bubb also wants ministers to explore what role the sector could play in Total Place, a government pilot scheme to find ways of saving money by coordinating local services better and avoiding duplication.
An Acevo delegation will meet shadow chancellor George Osborne and other senior Conservative politicians next month to discuss the Tories' plans for involving charities in public services.