Evans, the Harlequins assistant coach and former New Zealand fly-half, will fill a role that has been undertaken since August 2021 by Martin Gleeson, who now faces an uncertain future.
A player for Quins from 2008 until 2017 when he moved into a tracksuit role, Evans has helped shaped one of the most effective attacks in the Gallagher Premiership and has also been responsible for mentoring Marcus Smith.
Harlequins have revealed that Evans will resume club duties during the Six Nations’ two fallow weeks and will return to Twickenham Stoop full-time once the tournament is finished.
“I’m delighted that Nick is joining our team ahead of the Six Nations,” Borthwick said. “Nick brings with him a wealth of different experiences as a player and coach, which will be incredibly valuable to the growth of our team.
“I know that Nick understands the pride and responsibility that comes with representing your country.
“We aim to build an England team that our nation can be proud of and I know that our supporters will be very excited by what Nick can bring to our side.
“We’d particularly like to thank Harlequins for their support in allowing Nick to work with us during this period. It’s a great example of club and country working together.”
England play their opening match of the Six Nations in four weeks’ time when Scotland visit Twickenham.
Evans’ appointment is an exciting development given he oversaw Quins’ attack for their title-winning 2021 season when they swept aside their rivals with an all-action style of rugby.
The Rugby Football Union has declined to say what impact Evans’ presence will have on Gleeson’s role within the coaching team.