Career
He previously rode for Dutch UCI ProTeam Giant–Alpecin. Born in Virginia, Free State, Janse van Rensburg competed with MTN–Energade from 2010 to 2012. Janse van Rensburg left MTN–Qhubeka at the end of the 2012 season, and joined Argos–Shimano for the 2013 season.
Subsequently it was announced that he would be rejoining MTN-Qhubeka for 2015.
He was named in the start list for the 2015 Tour de France.