Bath have agreed a deal to bring South African back row Nick Koster to the Rec from Western Province.
The 23-year-old has four years' experience in Super Rugby and has represented his country at all age group levels.
Bath head coach Gary Gold said: "Nick is a very exciting young player and we are delighted he has agreed to move to Bath.
"We are sure he will fit in with the club ethos we are developing."
Gold continued: "We have a very talented and competitive back row at present, and Nick knows he will have to fight for his place, but he is up for the challenge and we can't wait to see the results.
"We'd like to thank Western Province for their co-operation in allowing Nick to join us and we look forward to a long and prosperous relationship with them.
"Hopefully it will allow players to potentially spend time with the other club as and when the opportunity should arise."