The 23-year-old Italian will turn pro with the team and will shortly join up with his new team-mates at Team Sky’s December training camp in Mallorca.
On joining the team Leonardo Basso said: “It’s a dream come true to be joining Team Sky. My main objective is to help the team wherever I can. I want to learn about the job and what it means to be a pro bike rider. I want to learn as much as I can from my team-mates and increase my level day by day.
“From watching the team you can see they have a clear focus, they pay attention to equipment and the details that go into cycling. It’s impressive to see the innovation and to now be a part of that.”
Team Sky Sport Director Dario Cioni said: “We’re happy to see Leonardo turn pro with us next year. He’s got potential and we want to see where we can get to working together.
“He’s not a true sprinter but he can survive the punchy climbs and he has the speed to sprint from smaller groups. We’ve seen him pick up some results there in the last few years.
“He’s another good addition to the group of young guys who are developing within the team.”