Career
His surname is sometimes misspelled as "Kivuna". Kivuva started running in 2002 while at Syanamu Primary school. Later he went to Kinyui High School in Kangundo.
He is a silver medalist from the 2006 World Junior Championships behind compatriot David Rudisha.
He finished fourth at the Kenyan trial for the 2008 Olympics, missing the ticket to Beijing. He is competing at the 2009 World Championships in Berlin.
Joseph Mutua, who is also an 800m runner, comes from the same village as Kivuva.