The Scottish Futures Trust (SFT) has announced the creation of a joint venture company which aims to deliver an estimated £300m in construction projects over the next 10 years.
Hub South East is the first of Scotland's five hub territories to set up such a company.
SFT said it was a "significant milestone" for the hub programme.
Construction on the first project - Drumbrae Library and Community Hub in Edinburgh - is set to start this year.
The hub initiative aims to bring Scotland's public sector bodies together to deliver a wide range of joint services to try to achieve better value for money.
Hub projects will be delivered through a joint venture company called HubCo, formed between public sector bodies and a private sector development partner.
The Space consortium has already been selected as the preferred partner in the south east territory.
Bill Ness, who chairs the hub South East Programme Board, said: "The foundation of Hub South East Scotland Limited will ensure better value for money on a series of public sector joint projects for many years to come. Health boards, local councils and other public sector bodies will all benefit from working together on such joint community projects."
SFT, which was set up by the Scottish government to replace the Public Private Partnership (PPP) system of capital investment, allocated £6.5m start-up funding for initial hub projects in the south east territory earlier this year.
They include Drumbrae Library and Community Hub (£5.7m), Firrhill Health and Social Care Centre (£9m), Gullane surgery and day care centre (£4m), North West Edinburgh Partnership Centre (£35m), Wester Hailes Healthy Living Centre (£12m) and Blackburn Partnership Centre (£12m).
The hub programme is being delivered through five geographic territories. Across Scotland projects are expected to be worth more than £1bn in total.