Richard Cockerill and Anthony Seibold have joined Eddie Jones' England coaching set-up.
Former Leicester Tigers and Edinburgh head coach Cockerill has been appointed as forwards coach and will work alongside Matt Proudfoot.
Australian Seibold takes over as defence coach following John Mitchell's departure for Premiership club Wasps.
Seibold switches codes, with his most recent role being as head coach of NRL side Brisbane Broncos.
England head coach Jones said: "We're two years from the World Cup so we wanted to freshen up our coaching team and get the right people in place for where we want to go – which is to win the World Cup.
"We've added Richard to the team to work with Matt to create a dominant forward pack. He's a former England player, has great coaching experience and comes in as a well-rounded, mature, driven English coach."
Jones said of his compatriot Seibold: "Anthony is a coach that I have had a relationship with since 2019 and have followed his career closely.
"He is a good coach and thinks deeply about the game. John Mitchell did a great job improving us in defence and Anthony will add further nuances to the good system that he has put into place.
"It's an exciting time for rugby with the new season starting, supporters back in the stadium and the return of the grassroots game this weekend – with the rugby community celebrating being back together at Pitch Up for Rugby events around the country. We're looking forward to getting the squad back together and growing this England team."