Career
Impey is an all-rounder, acting as a domestique for puncheur Simon Gerrans, and as a lead-out man for pure sprinters, in his own right, he generally comes to the fore on tough uphill sprints. After riding for the South African team Barloworld in 2008 and 2009, in 2010 Impey joined Team RadioShack. Impey had originally signed for 2011 with the Australian team called Pegasus, but was forced to seek employment elsewhere after that team failed to secure a UCI license.
After riding for MTN–Qhubeka and Team NetApp in 2011, Impey joined GreenEDGE for the squad"s inaugural season in 2012.
In July 2014 Impey announced that he had tested positive for the banned substance Probenecid at the South African road championships in February, though he denied any wrongdoing. Impey was subsequently cleared of the doping charges at a hearing in August 2014, which accepted his explanation that the Probenecid had entered his system after ingesting contaminated gel capsules he had bought at a pharmacist.
In 2015, Impey had to abandon the Tour de France after being involved in a massive crash on the third stage. He was named in the start list for the 2015 Vuelta a España.