The decision to go for Tandy was overseen by new WRU director of rugby Dave Reddin.
“Steve’s coaching journey and the approach he has taken to his own learning and development since leaving the Ospreys impressed us during the interview process,” said Reddin.
“He embodies the collaborative and systematic approach to building success that I want to instil across our high-performance system.
“Steve is an excellent coach with the motivation and curiosity to continue to learn and develop very much a part of his DNA. These are hugely important characteristics for everyone in our system.”
There has been no official news of who will make up Tandy’s backroom staff, but Wales will look to recruit some coaches who have been involved in the past two campaigns.
Cardiff head coach Sherratt is in line to be attack coach, while current Harlequins scrum coach Adam Jones and Gloucester assistant Rhys Thomas are also being considered for roles under Tandy.
“Steve is a vital part of the future strategy for success in Welsh rugby and I will ensure he has the space, time and support to realise the potential of the exciting group of players he will have at his disposal,” said Reddin.
“He brings a wealth of experience, a unique understanding of Wales and the young talent we have at our disposal and a huge amount of passion and desire to excel in the role.”
