The Scarlets defence coach, John Muggleton will be leaving the region in May at the end of his two-year contract.
Muggleton signed a two-year fixed contract with the Scarlets in July 2008 and has been an integral part of the coaching set up at Parc y Scarlets over the last two seasons helping develop a number of new and young players.
A highly experienced former defence coach of Australia with whom he spent 10 years, the 50-year-old Sydney born dual-code player and coach arrived in Llanelli in July 2008, with more than 17 years coaching experience in Australia.
Muggleton has not revealed where he will be heading next but will be continuing in rugby coaching and thanked the region for the past two years.
He said: "I have enjoyed my time in Llanelli and it has been great to work within this very passionate rugby region with an amazing heritage. I wish them all the very best going forward."
Scarlets Head Coach Nigel Davies said: "John came here with a lot of experience and has had a significant role in working with a number of our younger players in the squad and developing our team as a whole.
"He was brought here on a fixed term contract for two years to help us shape and develop this new-look squad and has been an important part of our coaching set-up during the past two seasons.
"We are grateful for all the work that he has done for the Scarlets and for his commitment to us and wish him all the best in his future coaching roles."
Following Muggleton's departure next month, the Scarlets will be restructuring their coaching set-up for next season and Nigel Davies is expected to announce his new look coaching team in the next few weeks.
All roads lead to Cardiff on Sunday for the SSE SWALEC Finals Day at the Millennium Stadium. Cambrian Welfare tackle Ystradgynlais in the Bowl final, Ystrad Rhondda play Newcastle Emlyn in the Plate final while defending champions Pontypridd face Bridgend in the Cup final.
WRU Chief Executive Roger Lewis, Deputy Minister for Culture, Sport and Tourism Ken Skates and WRU Chairman Gareth Davies earlier this week launched a new competition in conjunction with the WRU unveiling its archive room.
Welsh players and management joined Deputy Minister for Sport Ken Skates at the Pierhead Building, Cardiff Bay earlier this week to reveal the Union's pioneering school-club hub initiative has been so successful the project will now almost double the scale of the original project.
The Scarlets, Newport Gwent Dragons, Cardiff Blues and the Ospreys look ahead to Judgement Day III which sees the Blues take on the Ospreys (2.30) and the Dragons tackle the Scarlets (4.45pm) at the Millennium Stadium tomorrow afternoon.
Ystradgynlais and Ynysddu played out a titanic struggle at Taffs Well in the SSE SWALEC Bowl semi-final. At the end of the game neither team could be separated after a 15-15 stalemate but Ystradgynlais go through on try count.
Blues strike first in JD III battle - Newport Gwent Dragons lock Andrew Coombs, WRU referee Dylan Llyr Jones and Cardiff Blues hooker Matthew Rees decide dressing room allocations for Judgement Day III
Wales Under 18 captain Calum Haggett has received a conditional offer to read Biomedical Science at St Anne's College, Oxford. WRU chairman Gareth Davies went to meet Calum and Coleg y Cymoedd Principal Judith Evans to wish him luck in his exams and pass on some of his personal experience.