The 53-year-old returned to the Bramall Lane to take over as boss in May 2016 and has since led the club – which he grew up supporting and later played for – on a remarkable journey from League One to the Premier League – and to within a whisker of qualifying for the Europa League last season.
Here we take a quick trip down memory lane to look at some of Wilder’s more memorable and magical moments during his time on the touchline at United.
1. The beginning . . .
Wilder and his assistant Alan Knill are welcomed to the Lane by then co-owner Kevin McCabe in May 2016. Photo: Sport Image
2. Let's celebrate
Wilder is about to celebrate with John Fleck after the Scottish midfielder scores the second goal in a 2-0 win over Coventry City in April 2017 - a victory which took the Blades to within touching distance of promotion to the Sky Bet Championship. Photo: Simon Bellis
3. Going up!
Wilder and team psychologist Steve Sylvester celebrate winning promotion to the Sky Bet Championship after a 2-1 win at Northampton Town in April 2017. Photo: Robbie Stephenson
4. Champions
Wilder and legendary Blades striker Billy Sharp celebrate winning the Sky Bet League One title in April 2017. Photo: Nathan Stirk