[3] He graduated from Uzhhorod University (1979, majoring in history) and the National Academy of Government Managerial Staff of Culture and Arts (2008).

[3] Kozhan worked as a laboratory assistant at the Department of Museology (1975–1976), a senior laboratory assistant at the Department of Carpathian Studies (1976–1980) at the Museum of Ethnography and Arts and Crafts of the Academy of Sciences of the USSR, a junior researcher at the Lviv Branch of the Rylsky Institute of Art History, Folklore and Ethnography of the Academy of Sciences of the USSR (1980–1984), an educator and teacher of social disciplines at the Lviv Film College (1985–1988).

[3] He worked at the Andrey Sheptytsky National Museum of Lviv: junior researcher (1988), head of the folk art sector (1989–1990), scientific secretary (1990–1991), deputy director for research (1991–1994), head of the department of exhibition and exposition and scientific and educational work (1994–2005), director general (from 2005 to the present).

[5] He contributed to the development of international relations with museums and scientific institutions in Poland, Lithuania, the Czech Republic, Romania, Austria, France, Italy, Germany, Mexico, Canada, and the United States.

[2] Head of the Museum Council at the Ministry of Culture of Ukraine (2010–2012),[5] State Examination Commission at the History Department of Ivan Franko National University of Lviv (2010–2015).