Pemberton made his debut for Costa Rica in a September 2010 friendly match against Jamaica and has, as of December 2014, earned a total of 24 caps. He represented his country in 2 FIFA World Cup qualification matches and played at the 2013 and 2014 Copa Centroamericana as well as at the 2013 CONCACAF Gold Cup. He was a non-playing squad member at the 2014 FIFA World Cup. And played all three games of the Copa América Centenario.