Referee since 1989. International referee since 1999.
From 2000 in Euroleague.
Refereeing EUROLEAGUE and EURO CUP games.

2003 - European Championship in Greece
2005 - Summer Universiade
2007 - World Champioship U20 in Moscow
2008 - Euroleague Final Four in Berlin
2009 - World Championship U19 in New Zeland
2009 - European Championship in Poland
2010 - World Championship in Turkey
2012 - World Championship U17 Man in Lithuania
2014 - Women World Championship Turkey
2015 - Eurobasket in Germany, Latvia, Croatia and France
2017 - VTB All Star Game, Sochi, Russia
2018 - VTB Final Four, Moscow, Russia
2019 - VTB All Star Game, Moscow, Russia

Kuba attended many camps and summer league in USA.
Since 2004, every year Kuba works as an instructor at EWM Camp. He was also twice invited to Japan as a lecturer.