Ex-England hooker Cockerill has joined the national team as a forwards coach alongside Matt Proudfoot, making a swift return to coaching less than two months after he left Edinburgh.
Former Brisbane Broncos and South Sydney Rabbitohs chief Seibold has been recruited to replace John Mitchell as defence coach in what will be his first rugby union role.
It wasn’t long after Cockerill stepped down from the Edinburgh helm in July that rumours surfaced regarding England’s interest in his services.
“I am excited to be joining Eddie Jones and the England team, working with the players and staff,” Cockerill said in a statement.
“I look forward to being part of and contributing to the world class environment that is England Rugby.”
The 50-year-old did his reputation no harm in four seasons with Edinburgh, who reached the Pro14 play-offs for the first time during his maiden year in charge.
He also enjoyed a short spell as coach of French giants Toulon in 2017, helping to rescue the club following a nightmarish spell for the Stade Mayol outfit.
Looking beyond the upcoming autumn fixtures, Jones mentioned the 2023 Rugby World Cup in France as a primary target, with his contract set to conclude after the tournament.
“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,” said Jones.
“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.”
The decision to appoint Seibold as defence coach is an intriguing one given he holds no prior experience in the 15-a-side code, having last coached NRL outfit Brisbane in 2020.
However, Jones’ Australian compatriot stated his excitement to work with England, describing the vacancy as “an opportunity that I could not pass up.”
The new appointments will have their first chance to work alongside England’s players when the squad is called to The Lensbury in southwest London for a mini training camp in late September.
Players will then be summoned back at the end of October to prepare for their November Test schedule, at which point Cockerill will look to begin making his influence felt.