Dukovac joined the Syrian Air Force in 1946. During the 1948 Arab–Israeli War, he was a captain in No. 1 Squadron of the Syrian Air Force, based in Estabal in Lebanon's Beqaa Valley. Following the end of the Arab–Israeli War, Dukovac emigrated to Canada. He settled in Toronto and started a family there. He worked for IBM and was a co-founder of one of the largest Croatian émigré organisations in Canada, the United Croats of Canada. He died in Toronto on 6 June 1990.