Praised for his leadership, offensive, and defensive skills, Giordano is one of the NHL’s top defencemen and was named to play his first NHL All-Star Game in 2015. The Flames have also honoured him for his charitable contributions; he was named recipient of the J. R. "Bud" McCaig Award in 2012. Internationally, Giordano played with Team Canada at the 2010 IIHF World Championship and was a member of the 2007 Spengler Cup winning team. In 2019, he was awarded the James Norris Memorial Trophy as the NHL's best defenceman, while having a career-best performance at the age of 35.