The Football Association of Wales has called a news conference for Monday afternoon in Cardiff, where the former Manchester United winger is expected to be unveiled.
Provided there is no late hitch, Giggs will be announced as the successor to Chris Coleman, who left for Sunderland in November.
Craig Bellamy, Osian Roberts and Mark Bowen were also interviewed.
The panel set up to conduct the search, led by FAW chief executive Jonathan Ford, is expected to put the finishing touches to the agreement on Monday morning.
The recruitment panel decision does not have to go to the ruling council of the association because they have full powers to make the choice.
Giggs, who has long been a target for the FAW, was one of the favourites for the role once Coleman departed after Wales failed to qualify for the 2018 World Cup.