A permanent bowling coach is yet to be identified after Rory Kleinveldt did the job in an interim capacity last summer.
Gwavu joins the national men's set-up after four seasons at the Johannesburg-based Lions team, where he won five titles. He has also worked with the Jozi Stars in the now defunct Mzansi Super League and with the Joburg Super Kings in the SA20. In addition, he been involved with South Africa's Under-19 and A sides.
"He brings a wealth of experience at the highest level in South African cricket with a coaching career that speaks volumes," Enoch Nkwe, South Africa's director of cricket said. "With the fine margins and the ever-increasing stakes in 50-over and T20 cricket, fielding has become a critical part of any successful team and we strongly believe Wandile's expertise will help the Proteas maintain their strong tradition of fielding excellence across both formats."