Chemoiywo gained his first international selection on grass for the 1994 IAAF World Cross Country Championships. At the race in Budapest he led with team mate William Sigei and narrowly finished as runner-up, one second behind. He beat Haile Gebrselassie once again, as the Ethiopian was third. Chemoiywo shared the team gold medal with Sigei as well as his individual silver medal. On the track he set a 5000 m personal best of 13:07.58 minutes at the London Grand Prix (placing third), was seventh at the Bislett Games, then improved his best by one hundredth to win at the Herculis meet. This ranked him in the top ten runners for the distance that year. He was entered into the 1994 IAAF Grand Prix Final but managed only eleventh place. That year he had his first and only career victory at the Kenyan Athletics Championships, winning the 5000 m.