In 2021, Sime was second in the 3000m steeplechase Ethiopian Olympic trials in behind Bikila Tadese Takele with both men running personal bests, Sime ran 8:12:11 to secure his qualification for the delayed 2020 Tokyo Olympics and was chosen in the Ethiopian squad.[4][5] However, Sime did not compete.[6]
He ran a new personal best of 8:10.73 at the Paris Diamond League event in June 2023, in the same race that his compatriot Lamecha Girma broke the world record in the men's 3,000 metres steeplechase.[7] He ran a new personal best in July 2023 at the Diamond League event in Monaco, running 8:10.56 to finish third behind winner Simon Koech.[8]