Tretyakov is the first Russian who won the World Championships (2013 in St. Moritz), the overall Skeleton World Cup (2008–09) and an Olympics bronze medal (at the 2010 Winter Olympics). He is the silver medalist of the 2011 World Championships in Königssee and 2015 World Championships in Winterberg, as well as of bronze medalist of the 2009 World Championships in Lake Placid (men's skeleton event) and 2015 World Championships in Winterberg (mixed team). In 2013 in St. Moritz, he became the world champion.