Borthwick joins Jones' England panel
Borthwick, who won 57 England caps and played in the 2007 World Cup Final, is a line-out specialist. He also captained England under Martin Johnson from 2008.
He will be reunited with Jones, having worked together for three years on Japan's 2015 World Cup campaign as well as at Saracens, where the Australian signed him as a player from Bath.
"This is a huge honour to be asked, as these chances don't come around often," said Borthwick, 36, in an RFU press release.
"We have an exciting group of players in England and I am really looking forward to the challenge and getting England beating the best teams in the world."
Jones began work earlier this month after being appointed on a four-year contract as the successor to Stuart Lancaster, whose tenure ended with a dismal group-stage exit at the World Cup on home soil.
"I'm delighted that Steve has joined my coaching set-up," Jones said.
"I have known him for a long time through Saracens and Japan and he has done fantastic work as a coach.
"Steve has a huge amount of international experience as a player and a captain and his coaching in Japan in recent years shows he can get the best out of the players at the highest level.
"He is a great addition and I look forward to working with him again as we look ahead to the start of the Six Nations next year."
Borthwick's playing career spanned 16 years which included captaining Bath and Saracens, before retiring at the end of the 2013/14 season with a record 265 Premiership appearances.
He began his transition into coaching while still playing for Saracens and took up the Japan forwards coach position in 2012.
