Hailing from Kaptagat in the Rift Valley Province, he began running in international competitions in his early twenties and initially competed in track races in Finland.
[2] He placed eighth at the Kenyan Cross Country Championships at the start of 2009 and spent much of that year competing in road races in the United States, which included top three finishes at the Azalea Trail Run and Cherry Blossom 10-Miler.
[1] He returned to the Portugal Half Marathon in Lisbon and successfully defended his title with a personal best run of 1:00.20 hours, beating World Championship medallist Emmanuel Kipchirchir Mutai in the process.
[3] The following March he entered the city's other race, the Lisbon Half Marathon, but proved to be far off the world record pace of winner Zersenay Tadese, as Sang finish in twelfth.
[5] He ran at the 2011 Ottawa Marathon in May and set a personal best of 2:10:58 hours in spite of a five-year gap since his previous outing over the distance, taking fourth place.