Education
Kemboi was part of the 4x400 relay team that finished fifth at the 1991 World Championships.
Kemboi was part of the 4x400 relay team that finished fifth at the 1991 World Championships.
He specialised in 400 metres. He is a World Championships and African Championships medalist, and competed at the Olympics. He competed at the Olympics for first time at the 1992 Summer Olympics, taking part in 400 metres, where he reached semifinal.
He was also part of the Kenyan 4x400 relay team that advanced to the final, but did not finish lieutenant
In the 400 metres indivivual race he was 7th. The second of his two Olympics assignment was at the 1996 Summer Olympics, when he competed only at the 4x400 metres relay race, where Kenya reached the final again, but did not start lieutenant
Doping
He was selected to compete at the 2000 Summer Olympics, but was suspended after testing positive for nandrolone in September 2000.
Other members of the team were Samson Kitur, Kennedy Ochieng and Abednego Matilu.