[10][11] That same year, also in the Czech Republic, he further improved to 1:01:27 at the Ústí nad Labem Half Marathon, taking fourth place.

[13][14] In February 2015 in Addis Ababa, the relative newcomer won the 32nd Jan Meda International Cross Country event, a 12-km race which he finished in 35:08 in a photo-finish with Bonsa Dida.

[15][16] Making his international debut, he took sixth place in the senior race which helped the Ethiopians narrowly take the team title on equal points with Kenya.

[20] Tamirat finished out 2015 winning the men's 10K of the 41st BOclassic on New Years Eve in Bolzano, Italy with a time of 28:28 atop an all-Ethiopian podium.

He finished 1.09 seconds behind British gold medalist Mo Farah with Paul Tanui of Kenya taking the podium for silver.

Dera Dida is also an elite runner among whose titles include the 2023 Dubai Marathon which she won alongside her husband's brother Abdisa Tola.