The Springboks have appointed Felix Jones as a defence consultant for the World Cup, the South Africa Rugby Union announced Wednesday.
The former Ireland international fullback will be reunited with head coach Rassie Erasmus after their time together at Munster.
His arrival comes after attack coach Swys de Bruin quit earlier this month citing personal and health reasons.
"I spoke to the players after Swys decided to step down and the consensus was that we didn't want a new attack coach," said Erasmus in a statement.
"The feeling was that bringing in someone in that role now with new ideas now would be destabilising at this last stage of the preparations.
"But they were interested in having more analysis of defensive patterns and structures to assist in breaking down the opposition."
Jones, 32, won 13 caps for Ireland and was part of the 2015 Six Nations title-winning squad. He also played for Irish sides Leinster and Munster.
After being forced to retire at the age of 28 due to a neck injury he went straight into the coaching staff at Munster, where he worked under Erasmus for the 2016/17 season.
Jones helped Munster to three consecutive Heineken Cup semifinals before leaving the province in June.
"Felix will bring a fresh eye to our analysis and planning, and I am looking forward to his input," said Erasmus. "He is a real student of the game and I believe the players will benefit from his contribution."
The Springboks open their World Cup campaign against New Zealand in Yokohama on Sept. 21. They have also been pooled with Italy, Namibia and Canada.