With Tinkoff set to be disbanded, Alberto Contador has signed a deal to ride for Trek-Segafredo in 2017, along with Jesus Hernandez.
Contador, a multiple champion in the Tour de France, Giro d'Italia and Vuelta a Espana, is among the most successful stage racers of the modern era.
The 33-year-old will end his association with Tinkoff - a team set to be disbanded - to join Trek-Segafredo, who also announced the arrival of Contador's long-time team-mate, climber Jesus Hernandez, on Thursday.
"I am thrilled about the opportunity that is in front of me," said Contador, who earlier this year reversed a decision to retire at the end of 2016.
"Trek-Segafredo is a very attractive and ambitious project that really inspires me. I had some excellent conversations with the team management, and we have a lot of goals and priorities in common. The big objective is to try and win the most important races on the calendar - first and foremost the Tour de France.
"The sporting side was the key point in my decision. This team is focused on performance, and there's a really strong group of riders with experience in all kinds of terrain, not only the mountains.
"I like that it's such an open, international group of riders. I am convinced that this team can provide me with the best structure and bring me in the best conditions to the races. I race to win, and I am determined to get intensely invested in this team."
Trek-Segafredo general manager Luca Guercilena added: "Alberto is a formidable rider and a real fighter. He's a champion. There is really no one like Alberto in the current peloton, and we are very happy to welcome him to the team."