The Sun says the different support departments at the Carrington training complex have been told of his plans.
Ten Hag wants to spend time with each of them to see how they work and meet the staff on a personal level.
This includes everyone from the technical analysis team to the nutritionists and conditioners.
Even the kitchen staff have been warned he wants to look at weekly menus and choose what will stay or go.
Ten Hag will speak to the groundsmen about daily training set-ups for drills ahead of pre-season.
The 52-year-old is a stickler for detail, even down to the length of the grass on different pitches.
A source said: “He’s bringing his own style. It feels like an army leader getting his troops in order.”
The ex-FC Utrecht boss took an official tour of the Aon Training Complex earlier this week and had his first press conference on Monday afternoon.