The South African Pro Continental team (currently known as MTN-Qhubeka) has hired Aldag as its performance manager.
I am really excited to have one of the most experienced individuals in cycling join our team," team principal Douglas Ryder said.
"Rolf has helped teams in the past excel on a performance level and a technical level and we look forward to the contribution he can make in our team as we embark on the next phase of our journey."
Aldag has previously worked with Cavendish on the old T-Mobile and HTC-Highroad squads, and of late, Etixx-QuickStep.
"I am happy to join Team Dimension Data, as the outfit will be known from 2016," Aldag said. "As a South African resident I have a good understanding of Qhubeka’s importance.
"I know how much impact the charity has on the lives of children and the future of the country. I am looking forward to play an active role for Qhubeka and hope to add some value to the team’s sporting success."