You'd think entering one of the biggest clubs in the world would be daunting for anyone. And managing that club - well, suffice to say it's not for the faint-hearted.
For a certain Louis van Gaal, however, no challenge seems too big.
After this summer, when his minimum target is to reach the World Cup semi-finals as Netherlands boss, the 62-year-old is holding no fear about what awaits him at Old Trafford.
Will Van Gaal be under any extra pressure during the World Cup knowing the task that follows?
"No. You do not know Louis Van Gaal. I give myself more pressure than anyone else. I will always win," he is quoted as saying by the Daily Mirror.
Hardly the words of a man short of confidence, even when the Dutchman knows that the last man who tried to do the job at Manchester United did not last a full season despite signing a six-year contract.
If Van Gaal's intention is to 'always win,' though, the tenure of David Moyes may be quickly forgotten by United fans. Indeed, if the 62-year-old fulfils his aims, the days of Sir Alex Ferguson may not seem to have been so long ago.
But Van Gaal is grateful to Moyes for his treatment of the injured Robin van Persie. The Man United striker is now fit enough to take part in the Netherlands' World Cup bid, something LVG says could not have happened without the permission of Moyes.
“He is coming out of injury. We built him already up in our federation, our medical department," he said.
“It was under the permission of David Moyes. So we could control him. He has worked very hard. Then he played two matches of 20 or 30 minutes and the last match 30 minutes.
“Van Persie had a heavy injury. So I think of course he is not 100% fit. He is not 100% fit. But he can play.”