|Bronze||2006 Doha||5000 m|
|Asian Indoor Athletics Championships|
|Bronze||2008 Doha||5000 m|
He switched from Burundi to represent Qatar and adopted a new name Sultan Khamis Zaman while competing for them. He ran under his new name and country at the 2004 Summer Olympics. He finished eighth in the short race at the 2004 IAAF World Cross Country Championships and won a team silver medal with Qatar.
He ran at the 2005 World Championships and the 2005 IAAF World Half Marathon Championships, finishing in 16th and 19th place, respectively. He won the Eurocross meeting in 2005 and 2007. He won the bronze medal in the 5000 m at the 2006 Asian Games.
He took the 3000 metres gold medal at the 2008 Asian Indoor Athletics Championships. He won his second world cross country team medal shortly after with a 22nd place finish at the 2008 World Championships. He represented Qatar at a major competition for a final time at the 2008 Beijing Olympics, but he did not progress beyond the heats.
- Hendrix, Ivo (2010-02-26). Matebo, Belete sisters the favourites in Diekirch Eurocross. IAAF. Retrieved on 2010-03-01.
- Hendrix, Ivo (2010-03-01). Nkuzimana and Mimi Belete the strongest in Diekirch. IAAF. Retrieved on 2010-03-01.
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