It is a decision I take with great humility and responsibility and know there is a huge legacy to live up to.
"Having coached against them you get to respect their identity so to get the opportunity to be part of that is a huge honour and privilege".
Little over two months ago, Proudfoot was masterminding England's defeat in the World Cup final as South Africa's forwards coach.
England has hired one of the key coaches behind South Africa's run to the Rugby World Cup title as part of a shake-up of the backroom staff under head coach Eddie Jones.
The two link up with Steve Borthwick, who moves into a skills coach capacity amid strong links with Leicester Tigers, and John Mitchell who stays on as defence coach.
"The Six Nations is a fresh start for the team so that is how we have approached our coaching staff", said Jones.
South African-born Proudfoot, a former Scotland global, has been involved with the Springboks since 2016 and joins England following the end of his contract with South Africa.
Having been in the opposite dugout in the World Cup final, he is set to join forces with Eddie Jones, who continues as England coach after guiding them to second place in the global showpiece event.
Jones welcomed the technical expertise that he believes Proudfoot would bring to the England coaching setup. "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".
Another arrival to the coaching staff is Simon Amor, who leaves his role as head coach of the England Sevens team to become attack coach under Jones.
"We used him in the run-up to the Rugby World Cup in some of our training camps. I'm also keen to work closely with the Premiership club coaches, keep improving and getting better myself, further developing what I've learned in my career so far".
"We have had our eyes on Simon for a while", said Jones. I have been very impressed with his dynamism and his rugby intellect. "The things I am most excited about are being able to learn in this environment and having an opportunity to help improve some great players and the team. We have done some great things under Scott Wisemantel and we will always be forever grateful for the work he did, but we are excited about Simon coming in and what he is going to bring".