In June 2013, Momčilović moved to Romania and signed a three-year contract with Liga I side Pandurii Târgu Jiu.
[1] He immediately became a first-team regular, making 31 league appearances and scoring four goals in his debut season at the club.
Momčilović also played 12 matches in the 2013–14 edition of the UEFA Europa League, managing to score in a 1–1 group stage draw with Portuguese side Paços de Ferreira on 3 October 2013.
[2] On 12 January 2016, FCSB reached an agreement with Pandurii for the transfer of Momčilović, who signed a three-year contract with the club and was given the number 15 shirt.
After struggling with injuries over the next two years, Momčilović left the club after his contract expired on 30 June 2020.