Densamo won two major international marathons in 1989 and in 1990. He was not among the three Ethiopian men who entered the marathon in the 1992 Summer Olympics. He represented Ethiopia at the marathon at the 1996 Summer Olympics, as the world record holder in the relatively humid summer Atlanta, Georgia conditions and was among 13 of a field of 130 who did not finish. Densamo's world record fell to Ronaldo da Costa at the Berlin Marathon in 1998.