South African Sharks' tighthead prop Wiehahn Herbst will join Ulster Rugby this summer on a three-year deal.
The 25-year-old - from Klerksdorp, South Africa - played his first game for the club in Super Rugby in the 2019/10 season, before going on to make 37 appearances.
The latest acquisition for the club said he looked forward to a "great opportunity to develop my career and to take it to the next level".
"Ulster Rugby is a province on the up," he said.
"The team is doing extremely well at the moment and with the stadium being redeveloped there is a great set-up at Ravenhill - it will be exciting to be part of."
Ulster's director of rugby David Humphreys described Herbst as a "highly talented young player with a proven track-record in a specialist position".
"I have no doubt that he will be a huge success at the Province and that he will follow in the footsteps of the other overseas players that have come to Ravenhill in making a major contribution to the success of Ulster Rugby," he said.