He also works in the legal team of the Gay Straight Alliance, an organization that fights for the LGBT rights in Serbia.

[1] He has worked as a lawyer in several domestic and international organizations, such as the Norwegian Refugee Council, the Danish Refugee Council, Mercy Corps and the Humanitarian Law Center, where he has represented national and religious minorities, Internally displaced persons, refugees and victims of war crimes.

During 2010, he worked at the United Nations Development Programme in Belgrade as a national consultant in charge of analyzing the application of the criminal code in the part that deals with discrimination.

[4] Olenik and some other members left the Movement of Free Citizens in early 2019, and claimed that they did not leave the movement because of Trifunović, but because of the change in politics.

[6] Olenik is a Vojvodina autonomist[7] and is known for his anti-clerical views and his opposition to the Serbian Orthodox Church[8][9] and advocates for the abolition of religious education in schools in Serbia, as well as for imposing a "luxury tax" for the Church.