Muserskiy began playing volleyball at the age of 8 under the guidance of Boris Osnach. In 2006 Muserskiy defended the colors of the junior national team. On 4 June 2010 in Yekaterinburg, in his first match for the Russian national team against USA in the FIVB World League Muserskiy scored 13 points and became the best scorer of the Russian team that day. In 2011, with his national team, he won the FIVB World League and the FIVB World Cup.