Alex Codling initially joined Munster as forwards coach consultant in November 2024, a role he combined with his position as forwards coach with the Ireland Women's team.
The 52-year-old made an immediate impact as Munster reached the Investec Champions Cup and BKT United Rugby Championship quarter-finals.
He joined on a full-time basis last summer after helping Ireland to reach the quarter-finals of the Women's Rugby World Cup in England.
A former head coach of Premiership club Newcastle Red Bulls, the Lewisham-born former England lock has also coached with the England Men's team, Harlequins, and Oyonnax.
Very popular among both players and staff, the province wishes Alex and his family the very best for the future.
"It was an incredibly tough decision to leave Munster as I have loved every minute of working with this special group of players," admitted Codling.
"I just wanted to give a big shout out to the incredible Red Army. Seeing thousands of you away at La Rochelle last year is something that I will treasure for the rest of my life.
"You really are the 16th man! I wish everyone associated with the club every success moving forward."
Munster head coach Clayton McMillan commented: "Alex has an unparalleled passion for lineouts. This is reflected through his outstanding work ethic, high attention to detail, and strong connection to the players.
"We understand the significant sacrifices he has made over the last two seasons to help us grow at Munster, and whilst we will miss his influence, we wish him all the best in his exciting new chapter."
The province's General Manager, Ian Costello, added: "We would like to sincerely thank Alex for such a positive contribution he has made to Munster in the last two seasons, and wish him all the best in the next stage of his career."