As a player, Darren won five Premier League titles, one FA Cup, two League Cups, the UEFA Champions League and the FIFA Club World Cup, as well as 80 caps for Scotland.
Commenting on the appointment, first team manager Ole Gunnar Solskjaer said:
“Darren has the United DNA running through his veins and he knows exactly what it takes to be a Manchester United player.
“He is at the start of his coaching career and his experience both on and off the pitch along with his winning mentality, commitment and hard work will be a great addition to the staff.