Five-time world time trial champion Tony Martin is to join Katusha.
Martin has competed for Eitxx-Quick-Step since 2012, claiming four of his five Tour de France stage wins in that period.
The German has won individual time trial gold at the World Championships on three occasions while winning the team event twice. He also took silver in the time trial at 2012 Olympic Games but could only manage 12th at Rio 2016.
Martin, who also has two Vuelta a Espana stage wins to his name, said: "I am excited to come to this strong team. Team Katusha showed last year that it was a winning team and, honestly, I really like the Katusha jersey.
"I will be proud to wear it in 2017 and 2018. Moreover, I also really like their Canyon bikes, and this is important for me as a TT rider. What convinced me the most to make the move was the fact that the team directors and the team manager really believe in me.
"I will be able to obtain more results than I have had so far. They have convinced me that I can still improve. On the other hand, and like in previous years, if I can help a team-mate win, I will be just as happy."