White replaces Alan Zondagh after the latter resigned in the wake of a poor start to the season that saw the side win just one of their six matches before the coronavirus outbreak forced a pause in the campaign.
"We need to re-build a winning culture at Loftus," White said in a media statement from the Bulls. "There's a great history and heritage here, and I'm looking forward to adding my contribution to the Bulls' legacy."
White led the Springboks to the 2007 Rugby World Cup title, and was most recently with Toyota Verblitz in Japan.
He has also previously coached the Sharks and Australia's ACT Brumbies in Super Rugby, and spent three years at Montpellier in the French Top14.
The Bulls are South Africa's most successful Super Rugby side with three previous victories in the Southern Hemisphere club competition. (Reporting by Nick Said Editing by Christian Radnedge)