Ulster assistant coach Dwayne Peel will leave the province in the summer to take up a role at Cardiff Blues.
The Welshman, capped 76 times for his country, joined Ulster in 2017 on an initial two-year deal, extending that by a further two years in 2019.
However he has made the decision to take the chance to return to his homeland, where he will serve as the Blues senior assistant coach.
"This is my fourth season at Ulster and it’s been an awesome experience for me," said the former Lions scrum-half.
"It was always in my plans to go back and coach in Welsh rugby at some point in my career, and I feel this opportunity has come around at the right time for me and my family.
"We’ve still got six months to go until the end of the season however, and my full focus and commitment remains on being successful with Ulster."
Ulster head coach, Dan McFarland praised Peel's influence, adding: "Dwayne has been an excellent part of our coaching team and organisation for the past four years, and on a personal level has been a great support to me.
"As a proud Welshman, this is a great opportunity for him to return home and get back into the Wales coaching system. I, along with the wider Ulster organisation, thank Dwayne for his work and wish him all the very best for the future."
Ulster host Toulouse at Kingspan Stadium on Friday night in the first round of the Heineken Champions Cup.
