How the men who've tried to fill Fergie's shoes at Old Trafford have fared November 21, 2021 Posted by Soccer Leave a comment Sir Alex Ferguson was manager at Manchester United for 27 years but the club are now looking for their fifth full-time boss since the Scot retired in 2013. Source: Sport Soccer-.Independent Author: Share this post: Share on Facebook Tweet this! Share on LinkedIn Share on Google+ Share on Pinterest