The former Magpies manager is back St James's Park on a three-year contract and will undertake a role overseeing "playing style and transfers" after a poor showing last seasonNewcastle have appointed former manager Joe Kinnear as director of football on a three-year contract.
The 66-year-old took over from Kevin Keegan at St James's Park in 2008 and left less than a year later after a series of health issues but he insists that he is much healthier than before thanks to a regular gym routine.
On his return to Newcastle, the former Wimbledon boss will work on transfers with chief scout Graham Carr and manager Alan Pardew, with Kinnear having the final verdict.
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"I intend to make Newcastle far better than they are now.
"I see a good player and know a good player. I have no other agenda. If I see players at the club right now and don't think they are good enough, I intend to move them on."
Kinnear only won five of his 26 games as Newcastle manager and was infamous for his first press conference, in which he immediately began a foul-mouthed tirade towards reporters.
The new director of football indicated that he would meet with Pardew, with whom he anticipates "no issues", on Monday.
"I'm not picking the team," Kinnear stressed. "I'm there solely to make sure he gets the best possible team on the pitch."