Uran and Rolland arrive at Cannondale-Garmin after it lost the services of Canadian Ryder Hesjedal, who is moving to Trek Factory Racing, and Etixx-QuickStep bound Irishman Dan Martin.
During his career at the French registered Europcar team, Rolland has notched up three top-ten finishes (2011, 2012, 2015), two stage wins (2011 Alp d’Huez and 2012 La Toussuire) and Best Young Rider (2011) at the Tour de France, plus a fourth overall at the 2015 Giro d’Italia.
"I believe that for all of his talent, he still has untapped potential," Jonathan Vaughters, CEO of Slipstream Sports said.
"We hope to bring some work in aerodynamics and a bit of fresh air to help him maximize that potential, while retaining that panache and style that make him the great rider he is.
"He is a rider who I believe can one day win the polka dot jersey and is an exciting addition to our 2016 line-up.”
Colombian climber Uran (currently with Etixx-QuickStep) is another who can be regarded as not quite reaching his full potential despite a pair of second place finishes at the Giro d’Italia alongside stage wins in 2013 and 2014.
He is the 2015 Columbian national time trial champion, and finished third overall in the 2015 Tirreno-Adriatico in what could be regarded as a disappointing season given his prior successes.
“Rigo is a leader not just for his excellent skills on the road, but for his charisma, Vaughters said. "He brings style and passion to racing and he will be a huge asset to the team.
"Rigo has one more step to climb in the Giro and I will put my heart into helping make that happen. We are very excited to add him to our 2016 line up.”