After military service, he worked as an actor in the Vincent Dunin-Marcinkievich Drama and Comedy Theatre in Mahiliou.

The parliamentary elections of 2004 and 2008 were not recognized as free and fair by the OSCE, the United States and the European Union.

Since December 28, 2010, Davydko was chairman of the National State Television and Radio Company of the Republic of Belarus.

As head of the state television, Davydko personally read the background text in a widely known propaganda film denigrating the democratic opposition.

[6] In 2011, after the wave of repressions that followed the 2010 presidential election, Davydko and several other top managers and employees of major state media became subject to an EU travel ban and asset freeze as part of a sanctions list of 208 individuals responsible for political repressions, electoral fraud and propaganda in Belarus.