Dee ihe na-aga n'ihu maka paragraf a - O mere ihe ngosi mbụ ya na mba ụwa na agbụrụ ndị na-eto eto na 2003 IAAF World Cross Country Championships, ebe ọ kwụsịrị n'ọnọdụ nke ise ma merie ọlaọcha ọlaọcha nke ndị na-eto eto na Peninah Jepchumba. Ọ gbara asọmpi na nzukọ na Spain na Portugal na 2004, na-agba ọsọ na 1500 mita, 3000 mita na di na nwunye nke 10K na-agba ọsọ. N'afọ na-eso ya, ọ tụfuru ebe ọ nọ na ndị otu mba na cross country mana o setịpụrụ oge kachasị mma nke 3000 m nke 8:53.46 nkeji na Nzukọ Gaz de France na Paris. Mgbe o weghaara ebe nke abụọ na Kenyan Athletics Championships, Chebet nwere ọkwa ọkwa mbụ ya na 2006 African Championships, ebe ọ bụ onye nrite ọla nchara n'azụ ndị Kenya ibe ya bụ Edith Masai na Isabella Ochichi. N'afọ 2007, ọ kwụsịghị na Mombasa na 2007 IAAF World Cross Country Championships
, mana o meriri n'ọsọ 10,000 m. O mechara nke itoolu na 10,000 m na 2007 World Championships. N'ime njem ikpeazụ ya n'afọ, o nyeere Kenya aka n'ọnọdụ nke abụọ na Chiba Ekiden Relay, mgbe ọ gbasịrị ụkwụ 5 km.