Geoffrey Kusuro's participation in the London Olympic Games marked his début in the quadrennial event at the age of 23. He attained qualification to the Games because his fastest time of 13 minutes, 12.32 seconds, set at the 2011 Míting Internacional d´Atletisme Ciutat de Barcelona, exceeded the "A" qualifying standard for the men's 5000 metres. Kusuro was drawn in the first heat of the event on 8 August, finishing 18th out of 20 athletes, with a time of 13 minutes, 59.74 seconds. Overall he finished 38th out of 42 runners, and did not qualify for the final because his time was 33.58 seconds behind the slowest qualifier.