The former Gunners midfielder was on the hunt for a club to train with and Arsenal offered to allow him to use their facility.
He will only be training with the senior squad and start his journey on the road to management.
Wilshere will be looking to get his coaching badges and Mikel Arteta insists that the club will help him in every possible way to achieve that.
Arteta told the club’s website: ‘What we should believe is that we want to help him to prepare for his next stage, physically, mentally, he wants to do his coaching badges again and we are prepared to fulfill all the needs that he wants. That’s basically the idea and there is nothing further than that.
‘I am very happy to have him back. We had a conversation with Jack and understand the needs that he has, the period that he is going through and I think everyone at the club agreed it was the right moment to help him.
‘He is going to be training sometimes with us. He is going to be around the place. He is going to be continuing his coaching badges that he is very interested in.
‘(We will) try to get him fit, try to get his experiences across to our players, our young players, our academy and I think it is great influence to have around.’
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