Bàsquet Manresa (2018–2022) Sima returned to Spain in 2018 to pursue professional basketball. He initially joined
CB Breogán on a trial period at the start of the
2018-19 season, but he never made his debut for the Galician team. Sima later signed with
Bàsquet Manresa of the
Liga ACB in December 2018. He made his professional debut on 24 December 2018, in a
Liga ACB game against
Obradoiro. In March 2019, Manresa extended Sima's contract until 2022. After seeing little playtime during the
2019-20 season Sima joined
Club Ourense Baloncesto on loan in January 2020, playing the rest of the season in the
LEB Oro. Sima spent two more seasons in Manresa, recording his best numbers in the
2021-22 season. He averaged 7.4 points and 4 rebounds per game in a total of 36 games played. Sima also reached the
2022 Basketball Champions League Final Four with Manresa, losing the final to
Lenovo Tenerife.
Reyer Venezia (2022–2023) Sima joined
Reyer Venezia in July 2022, competing in the
LBA and the
EuroCup. Seeing little playtime, Sima would leave the Italian side in January 2023.
Unicaja Málaga (2023–2025) Sima joined
Unicaja Málaga of the
Liga ACB and
Basketball Champions League on 12 January 2023. Unicaja would win the
2023 Copa del Rey in Sima's first season, but he missed the competition due to injury. Owing to his good performances with the Andalusians, Sima's contract was extended for another season in June 2023. In his second season with Málaga, Sima would win the
2023-24 Basketball Champions League. Sima's contract was extended with two additional years in July 2024. The 2024–25 season would be Sima's most successful yet, winning the
Intercontinental Cup, the
Spanish Supercup and the
Copa del Rey. Sima recorded his best numbers with Unicaja in the
Copa del Rey semifinal against
La Laguna Tenerife, scoring 21 points.
Valencia Basket (2025–present) On 4 July 2025, Sima signed a three-season contract with
Valencia Basket of the
Liga ACB and
EuroLeague. Valencia paid the release clause of the contract that bound Sima to Unicaja. ==National team career==