Simon Amor, formerly head of the England Sevens set-up and brought in as attack coach, and Matt Proudfoot have come into the fold.
Proudfoot, who will work as the forwards coach, was part of Rassie Erasmus' staff during South Africa's Rugby World Cup triumph last year.
The duo will work alongside defence coach John Mitchell and former England international Steve Borthwick, who switches to skills coach.
"The Guinness Six Nations 2020 is a fresh start for the team so that is how we have approached our coaching staff," Jones said. "With Neal Hatley moving to Bath we felt we needed to regenerate the forwards coaching area. Matt Proudfoot has had an outstanding coaching career to date culminating in being a World Cup winning coach with South Africa.
"He brings great technical expertise and knowledge having coached in South Africa and Japan and having played in Scotland and South Africa.
"We feel he can take the forwards to another level and build on the great work Neal and Steve have done over the last four years.
"We have had our eyes on Simon for a while. We used him in the run up to the Rugby World Cup in some of our training camps.
"I have been very impressed with his dynamism, his rugby intellect and he will bring a fresh view on how we build our attack. "
Jones remains in talks to extend his England tenure, with his contract set to expire in 2021.