 His earliest honours were team gold medals with Kenya at the IAAF World Cross Country Championships in 2006 and 2007.Soi has had his success on the track – he was the 5000 m bronze medallist at the 2008 Beijing Olympics and was highly successful at the IAAF World Athletics Final, taking three gold and three silver medals from 2006 to 2008.He became the continental champion on the track at the 2010 African Championships in Athletics and was the 3000 m bronze medallist at the 2012 IAAF World Indoor Championships.