Prior to the 2017–18 season, he was loaned to FMP from Belgrade.[2] He appeared in two ABA League First Division games with FMP.
In December 2017, Momirov signed a multi-year contract with FMP and went on a loan to his hometown-based team Vršac for the rest of the 2017–18 season[3][4] In March 2020, he parted ways with FMP.[5][6] In May 2020, after the COVID-19 pandemic ban, he joined a training camp of Partizan.[7]
On 28 August 2020, Momirov signed a two-year contract for Mega Bemax.[8]
In July 2021, he signed with the Greek club Kolossos Rodou.[9] In 26 games, he averaged 6.6 points, 3.6 rebounds, 1.1 assists and 1 steal, playing around 27 minutes per contest.