The company, which is set to lose £50 million after it failed to provide enough security guards for the Olympics, says it expects to fully meet its quota for Paralympic staff.
A G4S spokesperson said: "We are on track to meet our contractual requirements for the Paralympic Games and do not anticipate any workforce shortfall issues to arise."
The G4S workers will be supported by 3,500 soldiers, a reduction from the 12,200 army personnel involved in venue security during the Olympics when An extra 1,000 soldiers are on standby.
The scaled-back army presence means G4S will take on the majority of Games security work for the first time.
Paul Deighton, chief executive of Locog said he was "confident" in the security plans. He said: "In very simple terms, we're switching from an approach which had a slight majority of military during the Games to one which will have a slight majority of private sector security for the Paralympics."
Paralympic events are taking place today at the Olympic Park, Excel London, North Greenwich Arena, Greenwich Park and the Royal Artillery Barracks.
G4S also confirmed it is not bidding for security contracts at the Brazil 2014 World Cup or the Rio Olympics in 2016.
It was revealed weeks before the Olympics that G4S had trained only 4,000 of the 10,400 guards it was contracted to supply. Nick Buckles, chief executive of G4S, said he was "deeply disappointed" about the problems and
Will G4S gain credibility for successful Paralympics work? Comment below and let us know what you think.
To get a full review of the industry and its role in the Olympic Games make sure you subscribe to , which is available at the end of the year.