Since Jul 2022, he is the so-called “Deputy Head” of the so-called “Zaporizhzhia Regional Administration” established by Russian forces in occupied Melitopol.
In Mar 2014, Kozenko was appointed as a Deputy Chairperson of the State Council of the so-called "Republic of Crimea". He has publicly admitted his involvement in the events of 2014 that led to the illegal annexation of Crimea and Sevastopol, which he has publicly defended, including in an interview published on gazetacrimea.ru website on 12 Mar 2016. For his involvement in the annexation process he has been awarded with a medal "For the defence of "Republic of Crimea" by the local "authorities".