[9] Mladjenovic initiated and co-organised "Psychiatry and Society", a three-day 1983 international conference at the student cultural center in Belgrade.

[15][16] Four years later, she organized an all-women feminist group as part of Women and Society which was based on a self-awareness model.

[22][23][24][25] The group began with weekly vigils protesting the Serbian regime, and later became part of the worldwide Women in Black network.

[25] Mladjenovic was an educator and counselor from 1992 to 2012, working with women victims of male violence in Bosnia and Herzegovina, Croatia and Hungary.

She works in Italy with the Donne in Rete contro la violenza NGO,[28] and published a paper about feminist counseling for sexual violence.

[29] Mladjenovic and Suzana Tratnik were participants from Yugoslavia at the 1986 International Lesbian Information Service conference in Geneva.

She, Dejan Nebrigic and several other activists founded Arkadia, Belgrade's first gay and lesbian organization, in 1990; the group operated until 1997.

[33] Forty-five people participated from Novi Sad, Maribor, Skopje, Belgrade, Zagreb, Pristina, Split and Ljubljana, and the event introduced regional feminist cooperation.

[36][30] When she received the award, she said: "The place I come from is not the nation where I was born, but a lost lesbian country that I never had – but I will manage to create it, somehow.