Dejan came out in 1990 when he was a founder of "Arkadija", the first lesbian and gay lobbying group in Serbia. In 1991 he was one of the co-founders of the anti-militarist and peace journal Pacifik, and in 1992 and 1993 he edited its lesbian and gay pages.
In 1993 he joined the women's peace group "Women In Black Against War", and he edited the journal Women for Peace.
In 1998 and 1999 he was the Executive Director of the "Campaign Against Homophobia" which is supported by the Humanitarian Law Fund and the European Youth Association.
Dejan edited booklets on the social and legal aspects of homophobia in Serbia. He also produced a bibliography of writings on lesbianism and homosexuality in Serbian.
With the lesbian group "Labris" he and "Arkadija" organised public events in Belgrade to coincide with worldwide Gay Pride and international human rights days. He was frequently interviewed by the press and spoke out against homophobia.
It appeared that on his 29th birthday he was killed in his flat by his lover. The Serbian authorities used his death as an opportunity to repeat official accusations that homosexuality is detrimental to the state. He will forever be the cornerstone of the still unwritten history of gay activism in Serbia.