Bedford Blues have signed Old Albanians scrum-half Stefan Liebenberg to replace Will Chudley, who has joined Newcastle.
Former Cambridge number nine Liebenberg, 27, has experience as an England Counties player.
Nick Walshe has agreed a new deal to remain as player-coach at Goldington Road while hooker Chris Locke has also committed for the next campaign.
On Liebenberg's signing boss Mike Rayer said: "Stefan is a player that we have been aware of for some time."
He added: "Now is a perfect opportunity for him to step up to the Championship and show everyone what he is capable of.
"He has plenty of experience and has more than served his apprenticeship at both Old Albanians and Cambridge under the tutelage of James Shanahan and we are delighted that he has signed."
Former England international Walshe said: "I'm thrilled to have signed on for another year with the Blues and I'm particularly looking forward to working with our new signings to help them fit straight into the system that we play.
"Mike has pinpointed a number of areas that need strengthening up and I'm sure that everyone will agree that we have made so very impressive signings."