Transport for London will offer 765 training places
About 1,000 apprenticeships a year will be offered within the Greater London Authority (GLA) to create a "skilled workforce", Mayor Boris Johnson said.
Those keen on preparing for the job market will find opportunities in the GLA, local councils, Transport for London and in the Metropolitan Police.
The placements are part of the mayor's economic recovery plan for the capital.
The offer comes as the Tories said the government may miss its national target of 130,000 apprenticeships a year.
Adults and young people will get training and work placement opportunities in various fields ranging from customer services to electrical engineering.
Mr Johnson said: "I am confident that London will emerge from this downturn strong and ready to challenge what will undoubtedly be stiff competition.
"But we must be ready and that means, even during this uncertain period, we must keep up our training schemes so we have a skilled workforce for the future."
The GLA group will offer about 1,000 apprenticeships every year until 2012 which includes opportunities within Transport for London (TfL) and police.
The GLA will also offer 15 places this year to train people in business administration.
TfL and its contractors will bring in 650 adult and 115 young apprentices until 2010.
The Metropolitan Police Service and Metropolitan Police Authority will provide more than 150 apprenticeships.
The authority will also encourage other groups and its contractors to offer apprenticeships.
Rhyanna Armstrong, 21, a qualified electrician on an apprenticeship with TfL contractor, Amey, said: "Since joining the scheme last year, I've been extremely impressed with the jobs that I have been involved in - including the maintenance of subways and tunnels."