Doksim was born in Galičnik. He finished theological school in Prizren, and was a teacher in his home region until 1904, when he joined the Chetniks in the Macedonian struggle. He was highly commended for his participation in the battle of Čelopek 1905, when the Serbs won an significant victory. After the Macedonian guerila war, he went to Mount Athos, where he worked as manager of the Hilandar estate (the cradle of the Serbian Orthodox Church). He returned to Macedonia and married, then became principal at Serbian schools in Gevgelija. After that, he went to Greece and Malta and worked in trade. Doksim spoke Greek and Turkish since youth, and later taught Arabic and Italian. When the First Balkan War started, he immediately took arms and founded his company, joining voivode Vojin Popović-