Together with Lepa Mlađenović and another ten signatories, Nebrigić participated in the founding of Arkadija, the first LGBT organization in Serbia in 1990.[1] The following year Nebrigić was one of the founders and co-editors of the anti-war magazine Pacifik, where he wrote on gay and lesbian themes.[2] Nebrigić was active in the Centre for Antiwar Action which was also founded in 1991.