The most successful competition in his early career was 2009 European championships in Ufa, Russia, where he won silver in individual race and was 4th in sprint and pursuit.

Due to such good results he got a place in national team for 2010 Winter Olympics.

2010–11 season was marked with mixed relay podium in Pokljuka and World Championships.

The first ever World Championships medal was won at 2011 Worlds in Khanty-Mansiysk, Russia, when Ukrainian men's rely team (Semenov together with Deryzemlya, Sednev and Bilanenko) unexpectedly won bronze.

They became second Ukrainian pair to win these competitions after Andriy Deryzemlya and Oksana Khvostenko won in 2008.

[1] Due to poor physical conditions and illnesses he didn't show good results being just 46th in sprint.