Wales should do everything they can to keep the defensive coach Shaun Edwards after the World Cup, according to former coach Mark Jones.
Edwards is in talks with the Welsh Rugby Union to continue his role in the Wayne Pivac reserve team.
Wales is coming up with Edwards to work with Byron Hayward.
"If Wales can keep Edwards in the system and is financially viable, they must do everything possible to keep it," Jones said.
Pivac takes over Warren Gatland from the 2019 World Cup in Japan.
Edwards would work with Hayward who announced the Scarlets on Saturday as he left the region alongside Pivac and Stephen Jones, who have already secured the Welsh training team.
Jones played Edwards in 2008 and trained in the reserve team in Wales who won the 2013 Six Nations title under Rob Howley.
"It's not incredible," Jones told BBC Scrum V.
"Shaun is the holder, the man who is currently setting the level.
"It's one of the best coaches I have ever worked with and with."
Jones also trained Pivac and Hayward for the Scarlets in the 2014-15 season before Stephen Jones replaced him.
The former wing in Wales is interested to see how Hayward and Edwards' dynamics worked.
“It is certain that Byron would come home,” said Jones.
"It worked with Wayne before. It will be interesting to see how Wayne would manage that case if it happened."