Marko obtained his Master’s degree from the University of Belgrade Faculty of Law in 2014. He specialized in Criminal Law, Family Law, and Environmental Law. He spent his Master's year studying international child abduction in the modern world. He was employed in the Ministry of Defense’s Legal Department and was also working as a legal secretary in numerous educational institutions. His freelance engagements are including more than 40 longterm clients and he also established a consulting agency in 2021. He is the head of the sector in a company specializing in intellectual property and his focus is in trademarking. In addition to professional literature editing, he published a novel on the subject of history and mythology in 2020. Out of office his main focus are environmental and ecological issues.