In 2006, Docker made his Santos Tour Down Under debut for the United Water-Australia U/23 team where he finished 9th after the 147km stretch from Willunga to Willunga in Stage 4.
Docker returned to race in the Santos Tour Down Under another five times, where he raced for the UniSA Australia team in 2007 and 2011, and EF Education First in 2018, 2019 and 2020.
Throughout his career, Docker represented Australia at four World Championships and the Commonwealth Games. He told Cycling Tips José Been - “That was a proud moment because you know you are from one of the strong countries and are one of the strongest riders. It means you did something right!”
Docker plans to return to his hometown in Melbourne with his family after seeing out his 13-year career, which will end on the Roubaix velodrome in October.