Wales forwards coach Robin McBryde will join Leinster's coaching staff after the World Cup in Japan later this year.
McBryde, who has been a key part of Wales boss Warren Gatland's support team, will fill the vacancy at Leinster created by John Fogarty's appointment as Ireland scrum coach.
Gatland, McBryde and attack coach Rob Howley will all leave their Wales posts following the World Cup.
Former front-row forward McBryde, who won 37 caps for Wales, has been part of a national coaching team that masterminded three Six Nations Grand Slams.
The 48-year-old said: "I am delighted to be joining Leinster. They are one of the stand-out teams in Europe, with a strong identity and a proud history.
"I see it as a great opportunity to join a very experienced and exciting coaching team, and to help continue Leinster's great successes.
"I am hugely proud of my time with Wales, and it has been an honour to coach my country."
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