The Olympics' workforce is expected to more than treble from 3,315 to a peak of 11,000 on the Olympic Park and Olympic Village in 2010 and a total of 30,000 workers over the different phases of the project to 2012.
In addition, 250 new Apprenticeship opportunities will be created on the Olympic Park, including the Olympic Village, on top of an existing commitment to 2,000 training and apprenticeship places.
ODA chairman John Armitt said: "Halfway to 2012 we are right on track. The Olympic Stadium is taking shape, the Aquatics Centre and Olympic Village are coming out of the ground and the first venue - the sailing facilities in Weymouth and Portland - is complete. We are making good progress but we are not complacent, there is still a big challenge ahead.
Read Armitt's thoughts on what lies ahead in the first of a series of exclusive viewpoints for NCE here.
"We are also delivering vital business, jobs and training opportunities in a tough time for companies and workers. Maximising Apprenticeships on the Olympic Park is an important boost to this legacy," Armitt added.
Olympics minister Tessa Jowell said: "London 2012 is a key part of the government’s economic recovery plan, providing jobs, training, and billions of pounds worth of contracts for UK firms."
London 2012 achievements to date include:
Cleaning and clearing of the majority of the contaminated 2.5km2 Olympic Park site
Starting early with construction on the Olympic Stadium and Aquatics Centre
Removing pylons from the skyline with power now running through two new tunnels dug beneath the site
Completing construction on the first London 2012 venue with Weymouth and Portland sailing facilities finished on time and on budget