Kieran Campbell, will move from Ulster to Connacht in the summer.
The 28-year-old has played for Ireland three times. He has been pushed down the pecking order in Ulster and sees this as an opportunity to re-ignite his career.
"I'm excited to be joining a Connacht side which is very competitive and gaining great impetus under the guidance of Michael Bradley and Eric Elwood," he said.
"Obviously, with Michael Bradley at the helm, I'm sure he'll have a significant influence on how I play, having been a former Irish scrum-half himself."
Connacht CEO Gerry Kelly reacted predictably: "Kieran sees this as an opportunity to push himself back into the Irish setup.
"While playing at Ulster he has been frustrated by the lack of playing opportunities due to the success of Isaac Boss and with that in mind he is a great asset for us to acquire for the forthcoming season," said Kelly.