During that spell his playing development was carefully monitored by the Partizan coaches and it was decided that he join the first team squad.
Throughout the first half of 2012, during which Partizan guaranteed the 2011–12 SuperLiga title under Avram Grant, Tomić reportedly attracted interest from Roma.
[6] For the first time in his life, Tomić moved abroad to Turkey and signed for Gençlerbirliği on 4 January 2013 on a three-year contract.
Tomić made his debut for the Serbian senior team in a friendly match against Japan on 7 April, in 2010.
On 13 October 2009, Nemanja Tomić scored a goal against Croatia U21 and celebrated by gesturing his hands resembling the shooting of firearms in the direction of the Croatian supporters.