From an early age, Marik engaged in various types of educational and social activism. As an undergraduate at the Hebrew University of Jerusalem, Marik volunteered with the student chapter of the environmental organization Green Course. As the chapter manager on the Mount Scopus campus, he led several effective campaigns for public transportation and the preservation of green open spaces. Since 2010, Marik has been very active in the fields of social and political change in Jerusalem. He was one of the founding members of Yerushalmim, a pluralistic urban movement, HAshgacha Pratit -alternativeKosher system and other social initiatives. He is also an active member of the Shaharit Institute, through which he has founded a group of Israeli Russian-speaking activists called Generation 1.5 that has challenged the public discourse on Russian Israelis through successful social media campaigns. Since 2014, Marik has been pursuing a Ph.D. in politics and government at Ben Gurion University and works as a researcher at the Jerusalem Institute for Israel Studies. His field of research is the geography of Jewish-Arab relations in Jerusalem.