Simplify the following text for a Grade 9 native English-speaking person.
Original: He was the head of the London bid to host the 2012 Summer Olympics , and , after the International Olympic Committee awarded the games to London , became the chairman of the London Organising Committee for the Olympic Games .
Simplified: He is the head of the London bid to host the 2012 Summer Olympics . After the International Olympic Committee awarded the games to London , he became the chairman of the London Organising Committee for the Olympic Games .