Munster assistant coach Anthony Foley says the opportunity to work with Ireland's backroom staff during November was too good to pass up.
Foley, who carried out a similar role during the Six Nations, is the defensive guru ahead of Test matches against South Africa, Fiji and Argentina.
"I was delighted when Declan approached Rob and me about the possibility of working with the Ireland team again," said former forward Foley.
"I enjoyed the opportunity I got during the Six Nations to work with the players and I felt once we were all comfortable with the balance between Munster and Ireland, I jumped at the chance.
"I certainly feel I can contribute positively and when you get the chance to coach with your country, you don't want to pass it up."
It seems that Foley's venture will not be a problem for Munster head coach Rob Penney, who is happy with the current agreement that is in place.
"We knew it was on the cards. It just means people within the organisation have to take a bit of a greater workload," he told the Irish Independent.
"He is not gone forever, he will still be in touch and we will still be working with him when he is with the national squads.
"We are comfortable that we will have everything in place to cater for any shortfalls."