[4] In 2001, Oleksandr Korniyenko entered the National Technical University of Ukraine “Igor Sikorskyi Kyiv Polytechnic Institute”.

2 years later, in 2020 Oleksandr Korniyenko was enrolled to the Educational and Scientific Institute of Public Administration and Civil Service of Taras Shevchenko National University of Kyiv for a postgraduate course, completing it with the dissertation topic “Models of Territorial Organization of Public Authority: A Comparative Analysis”.

[citation needed] From 2005 till 2006, Korniyenko was a Deputy Chair of the youth wing of the Reforms and Order party (right-wing liberals).

Later, he worked as a consultant to the Secretariat in DemAlliance Party (Christian Democrats) for two years till 2017.

In 2018 Korniyenko joined the Servant of the People party (ALDE member), ZeTeam (the team of Volodymyr Zelenskyi).

From August 2019 till October 2021 Korniyenko was the First Deputy Head of the mono-majority faction – "Servant of the People" – in the Verkhovna Rada of Ukraine, the Head of the Subcommittee on the Organization of State Power of the Verkhovna Rada of Ukraine Committee on State Building, Local Governance, Regional and Urban Development.

Takes an active position on public administration reform in Ukraine and decentralization of power.