The Olympic Delivery Authority has put the northern section of the Olympic Park out to tender.
The ODA is seeking a contractor to manage the transformation of former industrial land and landfill into 40 hectares of new parkland and waterways.
The job will also involve building the Olympic Concourse which links venues on the site. A similar contract for the south of the park will be issued in 2008.
ODA chief executive David Higgins said: “This is an opportunity to help create an Olympic Park that is a fantastic backdrop to the Games.
“We want to work with our contractors and designers to build a living and breathing park that sets the standard for the green spaces of the future.”