Zadorozhnii was born on 26 June 1960 in the village of
Krasnyi Kut, which was then part of the
Ukrainian SSR in the
Soviet Union. His father, Viktor, was a professor at the Academy of Fine Arts & Architecture, and his mother Klavdiia was retired at the time of his birth. After graduuating in 1982 from the
University of Kyiv with a specialty in international law, he received his Candidate of Legal Sciences in 1988. Simultaneously, while as a postgraduate student, he was deputy dean of the faculty there. He worked at the University of Kyiv up until 2008, eventually becoming a professor and vice-rector. In 1990, he became the founder and director of the law firm "Prosken", which he ran until 1998. == Political career ==