The 43-year-old was part of the 2003 World Cup-winning England side and had previously been working with the RFU on a part-time basis mentoring up-and-coming flankers.
The former Saracens player will now join Eddie Jones's backroom staff in the newly-created role which will begin on October 2 and will see him provide off-field support to the team.
"Richard is an icon of English rugby and I'm very pleased he has agreed to join the management team," Jones said in a statement.
"Richard's vast international experience and in-depth knowledge of the RFU player pathway means he's a great fit for this role in the England set-up. It's important we use the knowledge of former international players and keep an historical link with the past. I'm in no doubt he'll excel in his role.
"I look forward to working with him again as we continue our preparation for the Old Mutual Wealth Series later this year."
Hill added: "It's a great honour to take up this position with the national team. These are exciting times for English rugby and I look forward to supporting the team and management in our journey to the World Cup in 2019."
Hill won 71 caps for England during his eight-year international career, in addition to five Test appearances for the British and Irish Lions.