G4S says it will appoint a chief operating officer to work closely with chief executive Nick Buckles on customer service and project delivery.
It has also promised to carry out more rigorous risk assessments of new contracts and will demand board-level oversight on contracts where annual revenues exceed £50 million.
G4S said its board had decided that it was in the best interests of the company and its shareholders that Buckles remains as chief executive.
Buckles, who admitted to MPs that the Games staffing episode had been a "humiliating shambles", was not guilty of any significant shortcomings in his performance, the company said.
More top news
Polling projections show the far-right leader Marine Le Pen and centrist Emmanuel Macron leading in the first-round of the French election.
Winds veer northerly overnight and a band of patchy rain moves slowly southwards - wintry in places.
A special committee set up to deliberate on Ireland's abortion regime has called for the procedure to be allowed without restriction.