Pedzisa mutsara unotevera: VaMasai vakaberekerwa mumusha weChepkoya, muRuwa rweMount Elgon. Ndiye wechitatu mumhuri ine vana. Akakwikwidza mumazuva ake echikoro chesekondari achiri kuKibuk Secondary School. Akapedza kudzidza muna 1988. Akabatana neKenya Prisons Service muna 1990, anozivikanwa nekutsvaga vatambi vane tarenda. Zvisinei, Masai haana kubudirira kusvikira muna 1999, paakava shasha yenyika yokumhanya mhiri kwenyika, pazera remakore 32. Saka akatanga kunyatsodzidzira. Akakunda mujaho weLotto Cross Cup muBrussels muna 2001 uye akazowana menduru yebronze munhangemutange pfupi pa
World Cross Country Championships gore iroro. Akavandudza izvi gore rakatevera, achitora goridhe pa2002 IAAF World Cross Country Championships.