So you've read our serious guide to the new gaffer... but did you know these 5 nuggets of information? Impress your mates down the pub with these!
John Sheridan scored the 100th Irish international goal at Lansdowne Road in 1994 against Bolivia.
Ireland won the match 1-0. Sheridan won 34 caps in his international career, scored 5 goals and went to three major tournaments.
He was born in Stretford, Greater Manchester, typically a Manchester United supporting area. So you might forgive him for being a fan of the Red Devils...
However, Sheridan has publicly said he is a supporter of the BLUE side of Manchester, and this was pre Premier League success!...
John Sheridan scored the winning goal in the 1991 League Cup final for Sheffield Wednesday, to defeat Manchester United at Wembley Stadium.
It was the only goal of the game in what was then known as the 'Rumbelows Cup' final. Some Wednesday fans refer to this goal as the 'laser beam'!
It's hard to see how we could argue with that.
John Sheridan has an impressive overall managerial win percentage at 38%.
As well as mounting title winning campaigns, this includes saving clubs from relegation. Here he is being interviewed after his Chesterfield side saw off Oldham to reach the Football League Trophy final in 2012.
And finally... John Sheridan is also a character in the TV series Babylon 5.
John Sheridan is the lead character in the fictional universe of the science-fiction television series Babylon 5, played by Bruce Boxleitner. For most of the series, he is the commander of the Babylon 5 station; during the series' final season he is the President of the Interstellar Alliance.
Here's a John Sheridan montage set to a cover of Bonnie Tyler's 'Holding Out For A Hero'. Yes, someone did take the time to create this. We don't know why.
To be honest, we're starting to question if this is actually the same guy.