Team Sky have signed Michal Kwiatkowski from Etixx - Quick-Step.
The Pole was the 2014 World Champion and has wins at Paris-Nice, the Tour de Romandie, Amstel Gold Race and the Tour of Britain.
He joins Alex Peters, Gianni Muscon, Michael Golas, Danny Van Poppel, Mikel Landa and Benat Intxausti in the squad for 2016 and speaking about his move, Kwiatkowski said: "Team Sky aim for the highest goals in cycling so I'm very happy that this move has become a reality.
"Sir Dave Brailsford believes in my ability, which gives me great confidence for next season, and I know that this team can help me raise my performance levels and win big races.
"The team's marginal gains philosophy really fits my approach to cycling and I have great respect for what this team has achieved in such a short time.
"I am excited and motivated to race for Team Sky next year."
Team Principal Sir Dave Brailsford said to his team's website: " Micha³ has performed fantastically well over the past couple of years.
"We have been following his career for a long time. We have attempted to sign him on two occasions previously and weren't going to miss out this time around.
"Team Sky can help him progress and develop both his one-day racing and stage racing. Micha³ is still young, a great talent for the future, and will keep getting better."