The 68-year-old left management behind late last month after retiring from the dug-out all together.
But three weeks after stepping aside at Barnet he is back in a head of football role at the Gallagher Stadium.
Still served the Stones for three years between 1986 to 1989 and has always maintained a good relationship with the club and its fans.
Maidstone’s Bill Williams said: “I am absolutely delighted John has agreed to join us.
“He’s one of the best managers to ever grace the Non-League game and his record speaks for itself.
“For those who followed the Stones in the 80s, John’s place in our club’s history is assured and now a new generation of our supporters will get to see the enthusiasm, passion and skill this man has for the game.”
Braintree Town boss Hakan Hayrettin will be his number two after his old Luton Town assistant left Braintree on Wednesday night.
Simon Walton, stand in when Harry Wheeler was fired last month, will be retained as a player coach.
Maidstone have it all to do to avoid relegation back to the National League South.
Second from bottom of the table, Still’s first game will come against Leyton Orient on Saturday.