His father, Dmytro Frolovych, who had retired, worked as a forklift driver at the Simferopol furniture factory.

He took part in the work of the campaign headquarters of candidates for deputies of all levels from the Russian community of Crimea.

In September 2004, he was elected a member of the Board of the International Association of Youth Organizations of Russian Compatriots.

He worked on a volunteer basis as an assistant to the deputy of the Supreme Council of Crimea Sergei Tsekov.

and was a member of the standing committees: on economic, fiscal and tax policy; science and education; on culture, youth affairs and sports; on interethnic relations and problems of deported citizens; control commission on privatization issues.

From January to October 2009, he was Deputy Minister of Labor and Social Policy of the Autonomous Republic of Crimea.

He took part in the preliminary voting of the United Russia party on the eve of the 2016 State Duma elections.

[4] In the elections to the State Duma of the VII convocation, held according to a mixed system, Kozenko ran in the single-mandate constituency No.

On 5 October 2016, Kozenko was elected a member of parliament, a deputy of the State Duma of the VII convocation.

[5] Between 2016 and 2019, during the term of office of a deputy of the State Duma of the VII convocation, he co-authored 24 legislative initiatives and amendments to draft federal laws.

In December 2016, he became a member of the Committee for Public Support of Residents of the South-East of Ukraine under the Federation Council.

[9] In response, Kozenko said that he was indifferent to the European Union sanctions imposed on him the day, since the parliamentarian does not have a business in Europe and does not plan to travel there.