Jackson made his full international debut for Great Britain in 2007 Men's Hockey Champions Trophy and for England in 2009 Men's Hockey Champions Trophy. He was named FIH Young Player of the year 2009 and is the first English player to receive this accolade. He was a member of the Great Britain squad that finished ninth at the 2004 Summer Olympics in Athens, competed in the 2008 Summer Olympics in Beijing, and finishing 4th at the 2012 Summer Olympics in London. Jackson also played in the England squad that won Bronze at the 2014 Commonwealth Games.