[3][4][1] In 2017, Deso took part in the Route du Vin Half Marathon in Luxembourg, finishing in twelfth place with a time of 1:08:06.

[7][1] He broke away from the other runners about 4 km (2.5 mi) from the finish, and set a personal best by more than three minutes, though he missed breaking the course record by three seconds.

[7] Deso set his personal best at the 2020 Valencia Marathon, which was held during the coronavirus pandemic and restricted to elite athletes.

[11][10] Deso also ran the 2022 Valencia Marathon, placing sixth with a time of 2:04:56, three seconds slower than his personal record.

[12][1] He ran with the lead pack for most of the race, which was won by Kenyan Kelvin Kiptum in 2:01:53, the fastest debut marathon time ever.