London Legacy Development Corporation said they would join architects and graphics firms in a specialist panel to look at parklands, venues and neighbourhoods.
The Design Services Framework Panel includes Churchman Landscape Architects, East, Gustafson Porter, HASSELL and J & L Gibbons.
They will sit on the panel for four years and be joined by Kinnear Landscape Architects, muf architecture/art LLP and Strootman Landschapsarchitecten.
The corporation will issue mini competitions to the panel for projects such as canal-side parks.
They will also offer design guidance for the five new neighbourhoods.
Corporation chief executive Andrew Altman said:
"The park will be defined by high-quality design running through the neighbourhoods and all public spaces.
"Legacy plans are further ahead than any previous Olympic host city and this is a great opportunity for designers to help shape the future of the park after the games."
The panel was made up of a mix of small and local practices as well as larger more established firms, he said. The corporation invited companies to apply last November.
Highly acclaimed Churchman Landscape Architects worked on the National Maritime Museum in Greenwich and University of Warwick.
East is a specialist master and spatial planner, while world-famous Gustafson Porter designed the Diana, Princess of Wales Memorial Fountain.
Multinational firm HASSELL designed the Sydney Olympic Parklands and J & L Gibbons, a small, highly regarded practice, worked on Making Space in Dalston, which won president’s award in the Landscape Institute’s awards this year
Kinnear Landscape Architects is hot on conceptual and collaborative approaches to design while muf architecture/art LLP produce left-field, arty public-realm projects.
Strootman Landschapsarchitecten, a conceptually rigorous 12-person Amsterdam-based firm, integrates urbanism, cultural history, ecology, art and architecture.