The 2015 season for the Team Giant–Alpecin began in January with the Tour Down Under. As a UCI WorldTeam, they were automatically invited and obligated to send a squad to every event in the UCI World Tour.
In September 2014 German shampoo manufacturer Alpecin announced that they would co-sponsor the team alongside Giant for the 2015 season. In December 2014 Sunweb (a Dutch owned international tour operator) was announced as a new major sponsor of the team, signing a 2-year deal.
Team roster.
 ;section begin=roster / ;: "As of 1 January 2015"
 ;templatestyles src="Reflist/styles.css" / ;
 ;section end=roster / ;
 ;templatestyles src="Col-begin/styles.css"/ ;
References.
 ;templatestyles src="Reflist/styles.css" / ;