Gary Holt has "verbally accepted" a rolling one year deal to become Livingston head coach, the club have confirmed.
Holt arrived at Livingston's stadium on Thursday morning to be appointed as Kenny Miller's replacement.
The club said they hope "contractual formalities will be officially completed" by Friday, in time to take charge of Saturday's trip to St Mirren.
Miller left his post as player-boss on Sunday after seven weeks.
Former Falkirk boss Holt, 45, had been out of football since leaving his role as Norwich City's first-team coach two years ago.
Holt guided Falkirk to the Championship play-offs in his sole season in charge in 2013/14.
The former Scotland midfielder then left in to return to Norwich, where he spent four years as a player.
Livingston said they "amicably agreed to part company" with former Rangers striker Miller after talks over the weekend.
The club added that they "felt the player-manager role wasn't working" and wanted the 38-year-old "to revert to a full-time manager's role".
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'I worry for Holt' - analysis
Former Livingston manager John Hughes on Sportsound
I worry for him. Talking to Kenny Miller in recent weeks, I just picked up wee vibes that he felt the handcuffs were on him when he wanted to do things. The assistant manager David Martindale is apparently putting money in and will want a say and that brings conflict.
Hearts striker Steven Naismith on Sportsound
I had 18 months with him at Norwich. He was enthusiastic, he was on the level of the players, he knows how to set a team up and he wants to play good football.
Former Livingston head coach Allan Preston on Sportsound
I don't know Gary Holt at all as a coach, but I think that they need someone with more experience now. Giving someone a manager's job that's not really managed up here for any length of time is going to be very, very difficult.