Former New Zealand head coach John Mitchell will be joining Eddie Jones' staff as England's defence coach until the end of next year's Rugby World Cup in Japan.
Mitchell will leave his role of Executive of Rugby for South African Super Rugby side the Bulls and join up with former Wallabies boss Jones this month to help prepare for their upcoming run of internationals, including a clash against Australia on November 24 at Twickenham.
The 54-year-old replaces Paul Gustard, who took over as head coach of English premiership side Harlequins this season.
"This is an exciting opportunity to work with England Rugby and support Eddie Jones as head coach," Mitchell said.
"I will be joining an elite high-performance programme, test team and coaching group where I will use all my experience and focus to bring the necessary clarity and confidence to the players from a defensive perspective."
England's defence has come under intense scrutiny after a poor run of form in 2018 that has included five defeats in eight internationals.
Three of those losses came in the Six Nations as the defending champions finished a dismal fifth, and criticism has mounted in the wake of their 2-1 series defeat in South Africa.
The hope is that Mitchell's experience will aid an upturn in form. The New Zealander previously served as forwards coach to Clive Woodward when the latter was in charge of England between 1997 and 2000.
As head coach of the All Blacks, he won 23 of 28 tests and led the team to a third-place finish at the 2003 Rugby World Cup and consecutive Tri-Nations titles.
"Defence is a key pillar of our game and John is an experienced coach," said Australian Jones.
"He's coached the All Blacks, USA Rugby and a number of Super Rugby sides so he will bring a wealth of experience and add to the coaching mix we have here."
All Blacks fans are urged to get in quick if they are to secure seats at the 2019 Rugby World Cup in Japan, with officials warning tickets will sell out fast one year out from the tournament.
All Blacks captain Richie McCaw holds aloft the William Webb Ellis Cup after winning Rugby World Cup Final.
Half a million tickets have already been pre-sold with tickets set to be open for sale to the public at 1pm today (NZ time).
Head of the Rugby World Cup Alan Gilpin believes there will be an "unprecedented demand" for tickets which involves the home team, Japan's Brave Blossoms and the top tier nations.
"All the matches involving Japan, definitely all the matches involving New Zealand... England, Australia are experiencing high demand and we would expect they will be sold out very quickly," said Gilpin.
The All Blacks begin their title defence against the Springboks in Yokohama, the evening after the tournament opener between Japan and Russia in Tokyo on September 20, 2019.
Adult ticket prices are expected to range from ¥10,000 - ¥40,000 (NZD $136-$544) while tickets to the final on November 2 to cost anywhere between ¥25,000 - ¥100,000 (NZD $340-$1361).
"When you bring Rugby World Cup to a place like Japan, you hope that people will get behind it and the demand will be there – and it really has been," said Gilpin.
"It's a fantastic story for the event and a good message of confidence for the organising committee."