Kiss said: "Brian is working very hard and over the last two or three days he has put in some good rehab work with the medical staff who are doing a fantastic job there.
"Talking to him after the session he was very happy where he ended up, so he has another (rehab) session tomorrow and a couple of days rest where he will obviously be doing a little bit of stuff and we will see how he goes after that."
The South Africa clash will be the first in Ireland's all-new Aviva Stadium and Kiss expects it to be a fitting debut.
"It's a physical challenge right throughout the autumn," said Kiss.
"That starts in defence in a lot of ways with the Springboks in particular, as they challenge you at the set piece, they challenge you around the edge of the rucks and they also have the ability to shift the ball around the park and hurt you in that way as well.
"We are just really looking forward to that first game and obviously it being the Aviva's first game, we hope we can do it justice."