Nowakowski was in the Polish squad when the Polish national team won the gold medal at the 2009 European Championship. On September 14, 2009 he was awarded the Knight's Cross of Polonia Restituta. The Order was conferred on the following day by the Prime Minister of Poland, Donald Tusk. On July 10, 2011 Nowakowski, with the national team, won the first medal of the World League for Poland in history. They won a bronze medal after winning the match with Argentina. Then Poland played at the European Championship 2011, where they had to defend the title of European Champion. Nowakowski was a major player in the team and Polish national team won a second medal in 2011 - a bronze after winning match with Russia. In November 2011 Poland won a silver medal at the World Cup and therefore qualified for the 2012 Olympic Games. On July 8, 2012 the Polish team won gold medal of the World League 2012. Nowakowski was a main player of the Polish team at the Olympic Games London 2012, but Poland lost a quarterfinal with Russia. On August 16, 2014 he was named in the World Championship squad for the World Championship held in Poland. On September 21, 2014 the Polish team won the title of World Champion 2014. On October 27, 2014, he received a state award granted by the Polish President, Bronisław Komorowski: the Officer's Cross of Polonia Restituta "for outstanding sports achievements and promoting Poland in the world".