Career
He represented Rwanda in the 10,000 metres at the 2012 Summer Olympics. Kajuga qualified to the 2012 Summer Olympics on July 8, 2012 when he ran the 10,000-metre at the African Senior Athletics Championship in Benin in a time of 28:03 (minimum:sec). After his Olympic debut, where he finished 14th, he began participating in longer-distance road races.
Kajuga finished the men"s race at the 2013 IAAF World Cross Country Championships in 73rd place of 96 finishers.
On April 21, 2013, he ran a half-marathon in Nice, France recording a time of 1:01:37.